Before invoking the logger, project each event into a specific set of allowed fields to prevent sensitive data from appearing in AI application logs. Instead of relying on a final text replacement to capture everything, do not feed raw prompts, nested request objects, response bodies, or error messages into regular operational logs.

An operation identification, a controlled route name, status, duration, and a fixed error category are all recorded in the C# sample that follows. It renders renders renders renders renders renders renders renders renders renders renders renders.

The goal is a compact, inspectable logging contract with practical diagnostic evidence. This sample addresses one logging border; it does not verify an application's whole telemetry infrastructure.

Why can structured logs still expose sensitive data?
Structured logging preserves named fields so tools can search and aggregate events. Those fields can contain sensitive values just as easily as a formatted message can.

Masking the visible message does not establish that the underlying state is safe. A sink can serialize structured values separately. An exception can carry sensitive text in its message, inner exception, or data dictionary. A nested payload can acquire a new field after the original redaction code was written. The OWASP logging guidance identifies data such as credentials and sensitive personal information as requiring exclusion or appropriate handling. The practical implication here is to decide which operational facts are needed before selecting what to record.

What should the event contain?

Start with questions the operations team needs to answer: which route failed, how long the attempt took, and which related events belong to the same operation.

The operation ID should be generated for the workflow, not copied from arbitrary user input. Correlation identifiers can still reveal activity patterns, so access and retention remain relevant even when content is omitted.

What environment does the example require?
The code was compiled with SDK 8.0.414 and C# 12 and executed on .NET 8.0.20 on Linux. It uses Microsoft.Extensions.Logging from the ASP.NET Core shared framework.
Use a .NET 8 console project with a FrameworkReference to Microsoft.AspNetCore.App. This complete project file supplies that reference:
<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>net8.0</TargetFramework>
    <ImplicitUsings>enable</ImplicitUsings>
    <Nullable>enable</Nullable>
    <LangVersion>12</LangVersion>
  </PropertyGroup>
  <ItemGroup>
    <FrameworkReference Include="Microsoft.AspNetCore.App" />
  </ItemGroup>
</Project>

Replace Program.cs with the C# code below and run the project. The framework reference makes the logging abstractions available; it does not turn this console example into a web server.

All email-like strings, credentials, and request values are synthetic. The example does not call an AI provider or send telemetry to an external logging service.
Create a narrow logging boundary
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using System.Text.Json;
using System.Text.Json.Nodes;
using Microsoft.Extensions.Logging;

var sink = new CaptureLogger();
const string email = "[email protected]";
const string secret = "SECRET_47_SYNTHETIC";
var payload = new JsonObject
{
    ["prompt"] = $"Contact {email}",
    ["headers"] = new JsonObject { ["Authorization"] = secret },
    ["messages"] = new JsonArray(new JsonObject { ["content"] = secret })
};
var error = new HttpRequestException($"Failed with {secret}",
    new Exception($"Nested message: {email}"));
error.Data["raw_response"] = secret;
var attempt = new AiAttempt(Guid.NewGuid(), Route.Primary, 503, 120,
                            payload, error);
Audit.Write(sink, attempt);
payload["future_unknown_field"] = new JsonArray(secret, email);
Audit.Write(sink, attempt with { Status = 200, Error = null });
Audit.Write(sink, attempt with { Error = new OperationCanceledException(secret) });

foreach (var captured in sink.Events)
{
    string all = captured.Message + JsonSerializer.Serialize(captured.State)
                 + captured.Exception;
    if (all.Contains(secret) || all.Contains(email))
        throw new Exception("Sensitive sentinel reached a captured log surface");
    if (captured.Exception is not null)
        throw new Exception("Raw exception reached logger");
    string[] keys = captured.State.Keys.OrderBy(x => x).ToArray();
    string[] expected = ["{OriginalFormat}", "DurationMs", "ErrorKind",
        "OperationId", "Payload", "Route", "Status"];
    if (!keys.SequenceEqual(expected.OrderBy(x => x)))
        throw new Exception("Unexpected structured field");
    Console.WriteLine(captured.Message);
}
Console.WriteLine("PASS: 3 events; message, structured state, and exception checked");

enum Route { Primary, Backup }
record AiAttempt(Guid OperationId, Route Route, int Status, long DurationMs,
                 JsonNode Payload, Exception? Error);

static class Audit
{
    public static void Write(ILogger logger, AiAttempt a)
    {
        string route = a.Route switch
        {
            Route.Primary => "primary", Route.Backup => "backup", _ => "unknown"
        };
        string errorKind = a.Error switch
        {
            null => "none", OperationCanceledException => "canceled",
            HttpRequestException => "transport", _ => "internal"
        };
        int status = a.Status is >= 100 and <= 599 ? a.Status : 0;
        long duration = Math.Max(0, a.DurationMs);
        // Deliberately omit Payload and all exception content.
        logger.LogInformation(
            "AI attempt {OperationId} route={Route} status={Status} " +
            "duration_ms={DurationMs} error={ErrorKind} payload={Payload}",
            a.OperationId, route, status, duration, errorKind, "[REDACTED]");
    }
}

record Captured(string Message, Dictionary<string, object?> State,
                string? Exception);

sealed class CaptureLogger : ILogger
{
    public List<Captured> Events { get; } = [];
    public IDisposable? BeginScope<TState>(TState state) where TState : notnull
        => null;
    public bool IsEnabled(LogLevel level) => true;
    public void Log<TState>(LogLevel level, EventId eventId, TState state,
        Exception? exception, Func<TState, Exception?, string> formatter)
    {
        var fields = state is IEnumerable<KeyValuePair<string, object?>> values
            ? values.ToDictionary(x => x.Key, x => x.Value)
            : new Dictionary<string, object?>();
        Events.Add(new Captured(formatter(state, exception), fields,
                                exception?.ToString()));
    }
}

AiAttempt represents the broader application event. Audit.Write selects only the permitted operational fields. It receives the raw payload but never passes it to ILogger; the Payload logging field always contains the same marker. The exception category comes from a controlled type switch. Neither Message, InnerException, nor Data is serialized. The original exception is also omitted from the logging call, so a sink cannot receive it through that argument.

The custom logger captures both the formatted message and the structured state. This makes the test inspect the event's data, instead of checking only what happens to appear on a console.

Why omit a nested payload instead of walking every key?
A key-based redaction rule must recognize every sensitive location. A newly added messages, attachments, or diagnostic field can bypass an incomplete list. A projection that never includes the raw object has a smaller contract to inspect.

In the test, a new nested field is added after the first event. The later events still contain only the approved operational fields and the constant marker. The test does not depend on recognizing the new field's name. A technical walkthrough for Ranknod could use this distinction to show why redaction should be evaluated at the logging boundary. A clean-looking sample line alone does not establish that structured data and exception arguments are equally clean.

If selective content logging is necessary, design that as a separate, reviewed path with explicit purpose, access, and retention. Do not gradually expand an operational event into a transcript archive because each extra field is convenient.

What did the checks establish?
The executed sample captured three events: a transport failure, an event without an exception after the payload mutation, and a cancellation-category event. It checked each event for both sensitive sentinel strings, required the expected structured keys, and required the exception field to be null.

The final output was:
PASS: 3 events; message, structured state, and exception checked
The event messages retained status, duration, route, error category, and the redaction marker. The randomly generated operation GUID varies between runs.

These checks are intentionally scoped. They establish the behavior of Audit.Write with the supplied fixtures. They do not test background HTTP diagnostics, logging scopes, tracing spans, crash dumps, SDK diagnostics, or a production sink's enrichment rules.

How does this relate to .NET's redaction APIs?
Microsoft's .NET redaction documentation describes data classification, redactor configuration, and integration with logging. Those facilities can support applications that need classified fields and consistent redaction policies across many event types.

The example here uses explicit projection and a constant payload marker. It does not configure the compliance-redaction packages or claim that installing a package automatically classifies every field.

Choose the approach that fits the data contract, then inspect the actual emitted event. With either approach, an unclassified free-form field or a separate raw-exception call can create a path around the intended protection.

What should you check in the real application?
Exercise success, provider failure, timeout, cancellation, and retry paths with synthetic sentinels. Inspect every enabled sink, including structured exports. Add a new nested payload field and confirm that it does not enter an existing event unnoticed. Review scopes and automatic enrichers separately. This capture logger does not implement scope storage, so its success says nothing about a real application's scope contents. Also inspect SDK logging that occurs before your application wrapper receives the error.

Keep the fixed template and permitted-field list under review when the event changes. A useful operational log should explain what happened without copying the conversation that happened to trigger it.

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In this tutorial, I will show you how to create login form in ASP.NET core. You can easily implement this concept anywhere in .NET applications. I have used some controls to build the login form in a .NET application.

•  Text Box
•  Label and Button

Please follow these steps to make this application.
Step 1
First, open your Visual Studio -> File -> New -> Website -> ASP.NET Empty website and click OK. Now, open Solution Explorer and go to Add New Item -> Web form -> click Add.

Step 2
Now, make a Login page like the one given below.
.aspx or design page (front-end)
    <html xmlns="http://www.w3.org/1999/xhtml">  
      
    <head runat="server">  
        <title>Login Form</title>  
    </head>  
      
    <body>  
        <form id="form1" runat="server">  
            <div>  
                <table>  
                    <tr>  
                        <td> Username: </td>  
                        <td>  
                            <asp:TextBox ID="txtUserName" runat="server" />  
                            <asp:RequiredFieldValidator ID="rfvUser" ErrorMessage="Please enter Username" ControlToValidate="txtUserName" runat="server" /> </td>  
                    </tr>  
                    <tr>  
                        <td> Password: </td>  
                        <td>  
                            <asp:TextBox ID="txtPWD" runat="server" TextMode="Password" />  
                            <asp:RequiredFieldValidator ID="rfvPWD" runat="server" ControlToValidate="txtPWD" ErrorMessage="Please enter Password" /> </td>  
                    </tr>  
                    <tr>  
                        <td> </td>  
                        <td>  
                            <asp:Button ID="btnSubmit" runat="server" Text="Submit" /> </td>  
                    </tr>  
                </table>  
            </div>  
        </form>  
    </body>  
      
    </html>  

Now, create an event for click button, such as -  onclick="<>".
    onclick="btnSubmit_Click"  

So, our button tag will be like <asp:Button ID="btnSubmit" runat="server" Text="Submit" onclick="btnSubmit_Click" />. And in login.aspx.cs page, we need to write the following code.

C# Code --Code behind(Aspx.cs)
    using System;  
    using System.Data;  
    using System.Data.SqlClient;  
    using System.Configuration;  

After adding the namespaces, write the following code in code behind.
    protected void btnSubmit_Click(object sender, EventArgs e) {  
        SqlConnection con = newSqlConnection(ConfigurationManager.ConnectionStrings["dbconnection"].ConnectionString);  
        con.Open();  
        SqlCommand cmd = new SqlCommand("select * from UserInformation where UserName =@username and Password=@password", con);  
        cmd.Parameters.AddWithValue("@username", txtUserName.Text);  
        cmd.Parameters.AddWithValue("@password", txtPWD.Text);  
        SqlDataAdapter da = new SqlDataAdapter(cmd);  
        DataTable dt = new DataTable();  
        da.Fill(dt);  
        if (dt.Rows.Count > 0) {  
            Response.Redirect("Details.aspx");  
        } else {  
            ClientScript.RegisterStartupScript(Page.GetType(), "validation", "<script language='javascript'>alert('Invalid Username and Password')</script>");  
        }  
    }  

Now, for connecting it with the database, write the database connection string like the following.

Web Config
    <connectionStrings>  
        <add name="dbconnection" connectionString="Data Source=BrajeshKr;Integrated Security=true;Initial Catalog=MyDB" /> </connectionStrings>

That's it. Now, our Login page is ready to be executed. You can download the code for this application and run that on your Visual Studio.

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In this tutorial, I will show you How To Drag And Upload Multiple Image Files In ASP.NET. First, I create a blank ASP.NET WebForm Project. And then, right click on the Project ==>select NuGet Package Manager ==> Select DropZone and Download it.

Design a WebForm having a file upload control.
    <head runat="server"> 
        <title></title> 
        <script src="scripts/dropzone/dropzone.min.js"></script> 
        <link href="scripts/dropzone/basic.min.css" rel="stylesheet" /> 
        <link href="scripts/dropzone/dropzone.css" rel="stylesheet" /> 
          
        <script src="scripts/ai.0.15.0-build58334.min.js"></script> 
    </head> 
    <body> 
        <form id="form1" runat="server" class="dropzone"> 
            <div> 
                <div class="fallback"> 
                    <asp:FileUpload ID="file" runat="server" AllowMultiple="true" /> 
                </div> 
            </div> 
        </form> 
    </body> 
    </html> 

Write the following code in the code behind(.cs) file.
    protected void Page_Load(object sender, EventArgs e) 
           { 
               foreach (string s in Request.Files) 
               { 
                   HttpPostedFile file = Request.Files[s]; 
     
                   int fileSizeInBytes = file.ContentLength; 
                   string fileName = file.FileName; 
                   string fileExtension = ""; 
     
                   if (!string.IsNullOrEmpty(fileName)) 
                       fileExtension = Path.GetExtension(fileName); 
     
                   // IMPORTANT! Make sure to validate uploaded file contents, size, etc. to prevent scripts being uploaded into your web app directory 
                   // string savedFileName = Path.Combine(@"..\Files\", Guid.NewGuid().ToString() + fileExtension); 
                  string savepath = Path.Combine(Request.PhysicalApplicationPath, "Files"); 
                   string savefile = Path.Combine(savepath, file.FileName); 
                   file.SaveAs(savefile); 
               } 
           } 

Run the project and select multiple files and drag to the box.

Drag and drop all the images to the box. It will upload the images and save them to your local folder (here in Files Folder).

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Today, I will explain you about how to implement Generic CSV Writer which may take an input from any list and return a CSV string or write to a certain file, if specified. Although, this is a generic C# implementation and can be used in any .NET Framework supporting generics. Yet, we are going to discuss this with .NET Core. We are going to use .NET Core Console Application which is in continuation to Welcome to .NET Core Console Application.

Add new Class in DotNetCore.ConsoleApplication
We are going to add a new class CsvWriter in DotNetCore.ConsoleApplication.

• Open existing solution in Visual Studio 2015.

• Now, add a new class CsvWriter.cs.

        Open Add New Item Screen through DotNetCore.ConsoleApplication Context Menu of Common folder >> Add >> Class >> Installed >> .NET Core >> Class.

        Name it CsvWriter.cs.
        Click OK button.

• Add CsvWriter implementation.

        Write<T> (IList<T> list, bool includeHeader = true).
        Creates and returns the generated CSV.
        Write<T> (IList<T> list, string fileName, bool includeHeader = true)
        Creates and returns the generated CSV and saves the generated CSV to the specified path.
        CreateCsvHeaderLine
        Creates CSV header line, if includeHeader is set true.
        CreateCsvLine<T>(T item, PropertyInfo[] properties).
        Creates a CSV line for the given type of the object.
        CreateCsvLine(IList<string> list).
        Creates a CSV line for the given list of the string by joining them, demarcated by comma.

        CreateCsvItem
        Adds the provided value item to the processed list, used to create CSV line.

        CreateCsvStringListItem
        Adds the provided string list as a single item to the processed list, which is used to create CSV line.

        CreateCsvStringArrayItem
        Adds the provided string array as a single item to the processed list, which is used to create CSV line.

        CreateCsvStringItem
        Adds the provided string value item to the processed list, used to create CSV line.

        ProcessStringEscapeSequence
        Processes the provided data to handle double quotes and comma value. If we do not apply escape sequences, they can corrupt the data.

        WriteFile
        Writes the generated CSV data to the file.

ConsoleApplication
    public class CsvWriter { 
        privateconst string DELIMITER = ","; 
     
        public string Write < T > (IList < T > list, bool includeHeader = true) { 
            StringBuildersb = new StringBuilder(); 
     
            Type type = typeof(T); 
     
            PropertyInfo[] properties = type.GetProperties(); 
     
            if (includeHeader) { 
                sb.AppendLine(this.CreateCsvHeaderLine(properties)); 
            } 
     
            foreach(var item in list) { 
                sb.AppendLine(this.CreateCsvLine(item, properties)); 
            } 
     
            returnsb.ToString(); 
        } 
     
        public string Write < T > (IList < T > list, string fileName, bool includeHeader = true) { 
            string csv = this.Write(list, includeHeader); 
     
            this.WriteFile(fileName, csv); 
     
            return csv; 
        } 
     
        private string CreateCsvHeaderLine(PropertyInfo[] properties) { 
            List < string > propertyValues = new List < string > (); 
     
            foreach(var prop in properties) { 
                stringstringformatString = string.Empty; 
                string value = prop.Name; 
     
                var attribute = prop.GetCustomAttribute(typeof(DisplayAttribute)); 
                if (attribute != null) { 
                    value = (attribute as DisplayAttribute).Name; 
                } 
     
                this.CreateCsvStringItem(propertyValues, value); 
            } 
     
            returnthis.CreateCsvLine(propertyValues); 
        } 
     
        private string CreateCsvLine < T > (T item, PropertyInfo[] properties) { 
            List < string > propertyValues = new List < string > (); 
     
            foreach(var prop in properties) { 
                stringstringformatString = string.Empty; 
                object value = prop.GetValue(item, null); 
     
                if (prop.PropertyType == typeof(string)) { 
                    this.CreateCsvStringItem(propertyValues, value); 
                } else if (prop.PropertyType == typeof(string[])) { 
                    this.CreateCsvStringArrayItem(propertyValues, value); 
                } else if (prop.PropertyType == typeof(List < string > )) { 
                    this.CreateCsvStringListItem(propertyValues, value); 
                } else { 
                    this.CreateCsvItem(propertyValues, value); 
                } 
            } 
     
            returnthis.CreateCsvLine(propertyValues); 
        } 
     
        private string CreateCsvLine(IList < string > list) { 
            returnstring.Join(CsvWriter.DELIMITER, list); 
        } 
     
        private void CreateCsvItem(List < string > propertyValues, object value) { 
            if (value != null) { 
                propertyValues.Add(value.ToString()); 
            } else { 
                propertyValues.Add(string.Empty); 
            } 
        } 
     
        private void CreateCsvStringListItem(List < string > propertyValues, object value) { 
            string formatString = "\"{0}\""; 
            if (value != null) { 
                value = this.CreateCsvLine((List < string > ) value); 
                propertyValues.Add(string.Format(formatString, this.ProcessStringEscapeSequence(value))); 
            } else { 
                propertyValues.Add(string.Empty); 
            } 
        } 
     
        private void CreateCsvStringArrayItem(List < string > propertyValues, object value) { 
            string formatString = "\"{0}\""; 
            if (value != null) { 
                value = this.CreateCsvLine(((string[]) value).ToList()); 
                propertyValues.Add(string.Format(formatString, this.ProcessStringEscapeSequence(value))); 
            } else { 
                propertyValues.Add(string.Empty); 
            } 
        } 
     
        private void CreateCsvStringItem(List < string > propertyValues, object value) { 
            string formatString = "\"{0}\""; 
            if (value != null) { 
                propertyValues.Add(string.Format(formatString, this.ProcessStringEscapeSequence(value))); 
            } else { 
                propertyValues.Add(string.Empty); 
            } 
        } 
     
        private string ProcessStringEscapeSequence(object value) { 
            returnvalue.ToString().Replace("\"", "\"\""); 
        } 
     
        public bool WriteFile(string fileName, string csv) { 
            boolfileCreated = false; 
     
            if (!string.IsNullOrWhiteSpace(fileName)) { 
                File.WriteAllText(fileName, csv); 
     
                fileCreated = true; 
            } 
     
            returnfileCreated; 
        } 
    } 

Add Test Model Class in DotNetCore.ConsoleApplication
We are going to add a new class TestVM in DotNetCore.ConsoleApplication.

• Open the existing Solution in Visual Studio 2015
• Now, add a new class TestVM.cs.

        Open Add New Item Screen through DotNetCore.ConsoleApplication Context Menu of Common folder >> Add >> Class >> Installed >> .NET Core >> Class.
        Name it TestVM.cs.
        Click OK button.

• Add TestVM implementation.
• Update Program.cs to initialize List<TestVM> with the dummy data and call CsvWriter.

  

    public class TestVM { 
        [Display(Name = "Test Id")] 
        publicintTestId { 
            get; 
            set; 
        } 
        [Display(Name = "Name")] 
        public string TestName { 
            get; 
            set; 
        } 
    } 
     
    public class Program { 
        public static void Main(string[] args) { 
            Console.WriteLine("Welcome to .NET Core Console Application"); 
            List < TestVM > tests = new List < TestVM > { 
                newTestVM { 
                    TestId = 1, TestName = "Bill Gates" 
                }, 
                newTestVM { 
                    TestId = 2, TestName = "Warren Buffett" 
                }, 
                newTestVM { 
                    TestId = 3, TestName = "Amancio Ortega" 
                }, 
                newTestVM { 
                    TestId = 4, TestName = "Carlos Slim Helu" 
                } 
            }; 
            stringstringfileName = string.Format("{0}\\test.csv", System.AppContext.BaseDirectory); 
            CsvWritercsvWriter = new CsvWriter(); 
            csvWriter.Write(tests, fileName, true); 
            Console.WriteLine("{0} has been created.", fileName); 
            Console.ReadKey(); 
        } 
    } 
Run Application in Debug Mode

• Press F5 or Debug Menu >> Start Debugging or Start Console Application button on the toolbar to start the Application in the debugging mode. It will start an Application Console in the debug mode.
• It will generate test.csv at given path. Therefore at C:\ASP.NET Core\CSV Writer\DotNetCore\ConsoleApplication.NetCore\bin\Debug\netcoreapp1.0.

  

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In this post, I will tell you about how to create multi step form in ASP.NET. Multiview will be used to display the content on the tap of Tab. 

To show tab on the top, we will use Menu control. Thus, let's go and Add menu control from toolbox. I have given the Horizontal orientation, so that Tab will display horizontally. 
<asp:Menu 
           ID="menuTabs" 
           Orientation="Horizontal" 
           Width="100%" 
           runat="server"> 
           <Items> 
               <asp:MenuItem Text="Employee Info" Value="0" Selected="true"/> 
               <asp:MenuItem Text="Contact Info" Value="1" /> 
               <asp:MenuItem Text="Salary Info" Value="2" /> 
           </Items> 
</asp:Menu> 

To display the content for each tab, we will use Multiview control. I have given a property Selected="true" for Employee Info, so that when a page is launched, it will display the content of Employee Info.
<asp:MultiView ID="multiviewEmployee" 
                      runat="server" ActiveViewIndex="0"> 

</asp:MultiView> 

Next step is to add view inside Multiview. As I have three menu items, I need to add three views inside Multiview.
<asp:MultiView ID="multiviewEmployee" 
                       runat="server" ActiveViewIndex="0"> 
              <asp:View runat="server"> 
                <div> 
                    <%--To do--%> 
                </div> 
              </asp:View> 
               <asp:View runat="server"> 
                <div> 
                    <%--To do--%> 
                </div> 
              </asp:View> 
               <asp:View runat="server"> 
                <div> 
                    <%--To do--%> 
                </div> 
              </asp:View> 
</asp:MultiView>  

ActiveViewIndex= "0" will display first view after page is launched. Now, we will open corresponding view, when it is clicked on menu items. For it, we need to handle OnMenuItemClick event of Menu control. Hence, add it in your code and it will look, as mentioned below.
<asp:Menu 
  ID="menuTabs" 
  Orientation="Horizontal" 
  Width="100%" 
  runat="server" 
  OnMenuItemClick="menuTabs_MenuItemClick"> 
  <Items> 
      <asp:MenuItem Text="Employee Info" Value="0" Selected="true"/> 
      <asp:MenuItem Text="Contact Info" Value="1" /> 
      <asp:MenuItem Text="Salary Info" Value="2" /> 
  </Items> 
</asp:Menu> 

In CS page, assign the value of menu item to multiview .
protected void menuTabs_MenuItemClick(object sender, MenuEventArgs e) 
    { 
        Menu menuTabs = sender as Menu; 
        MultiView multiTabs = this.FindControl("multiviewEmployee") as MultiView; 
        multiTabs.ActiveViewIndex = Int32.Parse(menuTabs.SelectedValue); 
         
    } 

Now, it's none. Your tab structure is ready. Full code for ASPX is mentioned below.
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head runat="server"> 
<title></title> 
<style> 
    .viewCSS { 
        border: solid 2px black; 
        padding: 20px; 
    } 


    #menuTabs a.static.selected { 
        border-bottom-color: red; 
        border-bottom-style: solid; 
        border-bottom-width: 3px; 
        color: red; 
    } 
</style> 
</head> 
<body> 
<form id="form1" runat="server" style="width: 100%"> 
    <div style="width: 100%; margin-left: 20px; margin-top: 50px; margin-right: 20px;"> 

        <asp:Menu 
            ID="menuTabs" 
            Orientation="Horizontal" 
            Width="100%" 
            runat="server" 
            OnMenuItemClick="menuTabs_MenuItemClick"> 
            <Items> 
                <asp:MenuItem Text="Employee Info" Value="0" Selected="true" /> 
                <asp:MenuItem Text="Contact Info" Value="1" /> 
                <asp:MenuItem Text="Salary Info" Value="2" /> 
            </Items> 
        </asp:Menu> 
        <asp:MultiView ID="multiviewEmployee" 
            runat="server" ActiveViewIndex="0"> 
            <asp:View runat="server"> 
                <div style="margin-top: 40px;"> 
                    <asp:Table runat="server" CssClass="viewCSS"> 
                        <asp:TableRow> 
                            <asp:TableCell> 
                                <asp:Label runat="server">First Name</asp:Label> 
                            </asp:TableCell> 
                            <asp:TableCell> 
                                <asp:TextBox runat="server"></asp:TextBox> 
                            </asp:TableCell> 
                        </asp:TableRow> 
                        <asp:TableRow> 
                            <asp:TableCell> 
                                <asp:Label runat="server">Last Name</asp:Label> 
                            </asp:TableCell> 
                            <asp:TableCell> 
                                <asp:TextBox runat="server"></asp:TextBox> 
                            </asp:TableCell> 
                        </asp:TableRow> 
                    </asp:Table> 
                </div> 
            </asp:View> 
            <asp:View runat="server"> 
                <div style="margin-top: 40px;"> 
                    <asp:Table runat="server" CssClass="viewCSS"> 
                        <asp:TableRow> 
                            <asp:TableCell> 
                                <asp:Label runat="server">Address</asp:Label> 
                            </asp:TableCell> 
                            <asp:TableCell> 
                                <asp:TextBox runat="server"></asp:TextBox> 
                            </asp:TableCell> 
                        </asp:TableRow> 
                        <asp:TableRow> 
                            <asp:TableCell> 
                                <asp:Label runat="server">Mobile</asp:Label> 
                            </asp:TableCell> 
                            <asp:TableCell> 
                                <asp:TextBox runat="server"></asp:TextBox> 
                            </asp:TableCell> 
                        </asp:TableRow> 
                    </asp:Table> 
                </div> 
            </asp:View> 
            <asp:View runat="server"> 
                <div style="margin-top: 40px;"> 
                    <asp:Table runat="server" CssClass="viewCSS"> 
                        <asp:TableRow> 
                            <asp:TableCell> 
                                <asp:Label runat="server">Hire Date</asp:Label> 
                            </asp:TableCell> 
                            <asp:TableCell> 
                                <asp:TextBox runat="server"></asp:TextBox> 
                            </asp:TableCell> 
                        </asp:TableRow> 
                        <asp:TableRow> 
                            <asp:TableCell> 
                                <asp:Label runat="server">Salary</asp:Label> 
                            </asp:TableCell> 
                            <asp:TableCell> 
                                <asp:TextBox runat="server"></asp:TextBox> 
                            </asp:TableCell> 
                        </asp:TableRow> 
                    </asp:Table> 
                </div> 
            </asp:View> 

        </asp:MultiView> 
    </div> 
</form> 
</body> 
</html> 

I Hope it works for you!

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In this post, I will tell you about How To Change app.config Data in ASP.NET. Please write the following code to change app.config data at runtime.
    private static void SetSetting(string key, string value) 
           { 
               Configuration configuration = 
                   ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None); 
               configuration.AppSettings.Settings[key].Value = value; 
               configuration.Save(ConfigurationSaveMode.Full, true); 
               ConfigurationManager.RefreshSection("appSettings"); 
           } 

The code given below is used to fetch app.config data.
    private static string GetSetting(string key) 
            { 
                return ConfigurationManager.AppSettings[key]; 
            } 

App.config file

Key is lang and value is English.
 
Output

We get the "lang" value as English, this value is fetched from App.config file.

Modify App.config value at runtime.

Code
    public Form1() 
    { 
        InitializeComponent();  
        string objAppConfigValue = GetSetting("lang"); 
        SetSetting("lang", "Tamil"); 
        string objModifiedAppConfigValue = GetSetting("lang"); 
        
    } 

    private static string GetSetting(string key) 
    { 
        return ConfigurationManager.AppSettings[key]; 
    } 

    private static void SetSetting(string key, string value) 
    { 
        Configuration configuration = 
            ConfigurationManager.OpenExeConfiguration(ConfigurationUserLevel.None); 
        configuration.AppSettings.Settings[key].Value = value; 
        configuration.Save(ConfigurationSaveMode.Full, true); 
        ConfigurationManager.RefreshSection("appSettings"); 
    } 

In this post, let me explain you about Create Circular Progress Bar Dynamically In ASP.NET. For it, we will take a div and apply style to make it circular.

<div id="circularProgess" class="circularprogress background" runat="server"> 
          <div id="ProgressText" class="overlay" runat="server"></div> 
</div> 

Add the style, mentioned below.
<style> 
    .background { 
        background-image: linear-gradient(<%= Val1 %>, <%= ColorCode %> 50%, rgba(0, 0, 0, 0) 50%, rgba(0, 0, 0, 0)), linear-gradient(<%= Val2 %>, #AC2D36 50%, #ffffff 50%, #ffffff); 
    } 
 
    /* -------------------------------------
     * Bar container
     * ------------------------------------- */ 
    .circularprogress { 
        float: left; 
        margin-left: 50px; 
        margin-top: 30px; 
        position: relative; 
        width: 180px; 
        height: 180px; 
        border-radius: 50%; 
    } 
 
        /* -------------------------------------
         * Optional centered circle w/text
         * ------------------------------------- */ 
        .circularprogress .overlay { 
            position: absolute; 
            width: 130px; 
            height: 110px; 
            color: white; 
            background-color: #CF5760; 
            border-radius: 50%; 
            margin-left: 25px; 
            margin-top: 23px; 
            text-align: center; 
            line-height: 90px; 
            font-size: 35px; 
            padding-top: 20px; 
        } 
</style> 

In the background style, I have added val1 and val2, where I will assign from .cs page, so we can make a dynamic circular progress bar. Add the properties and methods, mentioned below in .cs file.
private string val1 = "90deg"; 
 
       public string Val1 
       { 
           get { return val1; } 
           set { val1 = value; } 
       } 
 
       private string val2 = "90deg"; 
 
       public string Val2 
       { 
           get { return val2; } 
           set { val2 = value; } 
       } 
 
       private string colorCode = "#ffffff"; 
 
       public string ColorCode 
       { 
           get { return colorCode; } 
           set { colorCode = value; } 
       } 
 
       protected void Page_Load(object sender, EventArgs e) 
       { 
           ProgressText.InnerText = "0%"; 
           CalculateActiveUsersAngle(75); 
       } 
 
       private void CalculateActiveUsersAngle(int TotalUser) 
       { 
           //int TotalUser = 50; 
 
           if (TotalUser == 0) 
           { 
               Val2 = "90deg"; 
               Val1 = "90deg"; 
               ColorCode = "#ffffff"; 
           } 
           else if (TotalUser < 50 && TotalUser > 0) 
           { 
               double percentageOfWholeAngle = 360 * (Convert.ToDouble(TotalUser) / 100); 
               Val2 = (90 + percentageOfWholeAngle).ToString() + "deg"; 
               Val1 = "90deg"; 
               ColorCode = "#ffffff"; 
           } 
           else if (TotalUser > 50 && TotalUser < 100) 
           { 
               double percentage = 360 * (Convert.ToDouble(TotalUser) / 100); 
               Val1 = (percentage - 270).ToString() + "deg"; 
               Val2 = "270deg"; 
               ColorCode = "#AC2D36"; 
           } 
           else if (TotalUser == 50) 
           { 
               Val1 = "-90deg"; 
               Val2 = "270deg"; 
               ColorCode = "#AC2D36"; 
           } 
           else if (TotalUser >= 100) 
           { 
               Val1 = "90deg"; 
               Val2 = "270deg"; 
               ColorCode = "#AC2D36"; 
           } 
 
           ProgressText.InnerText = TotalUser + "%"; 
 
       } 

CalculateActiveUsersAngle() method will calculate and show the exact angle .You can assign the angle if you want to CalculateActiveUsersAngle() method. For this example, I have assigned 75, so circular progress will display 75% on the radial. And here is the output:

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In this post, I will tell you how to Get IP Address In ASP.NET. An Internet Protocol address (IP address) is a numerical label assigned to each device (e.g., computer, printer) participating in a computer network that uses the Internet Protocol for communication. An IP address serves two principal functions: host or network interface identification and location addressing. Its role has been characterized as follows: "A name indicates what we seek. An address indicates where it is. A route indicates how to get there.”

There are two versions of IP address, earlier Version of IP address is IPv4 contains IP address as 32 bit number, and then because of growth of internet new version of IP is developed named IPv6 which takes 128 bit to store the IP Address.

There are different ways to get IP Address of visitor of the websites.

First method of getting IP Address is using “HTTP_X_FORWARDED_FOR” and “REMOTE_ADDR”. Where, “X_FORWARDED_FOR” is HTTP header field for identifying originating IP Address of the client who connected to internet and “REMOTE_ADDR” Returns the IP address of the remote machine.

Code to get IP Address using Method 1:

Second method of getting IP address is using built in functionality of ASP.NET. Here we use Request property of Page Class which gets the object of HttpRequest class for the requested page. HttpRequest is sealed class which enables ASP.NET to read the HTTP values sent by client machine during the web request. We access the UserHostAddress property of HttpRequest class to get the IP Address of the visitor.

Code to get IP Address using Method 2:

Default.aspx

Call above both method in Page_Load event, as soon as page will load you will get output like this.

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In this post, will tell you how to use Highchart in ASP.NET. Highchart in ASP.NET is purely a JavaScript and jQuery based API which can create interactive charts for representing the data. Highchart is a client-side API and it is flexible for use on different kinds of web browsers.

And here is the feature of highchart:

• Compatible: Highchart works on all kinds of browsers.
• Highchart is free for non-commercial purposes.
• Different types of charts are available.
• We can easily integrate it with .NET.

Types of Charts

Highcharts support different types of charts, such as:

• Gauges
• Basic Area chart
• Bar chart
• Column chart
• Line chart
• Pie chart
• Polar chart
• Range series

How it works

• Download this dll and add to your project:
• Download and add JavaScript to your project:
• Chart Creation
• Chart Output

Step 1

• Download this dll to add to your project or install NET Highcharts.
• You can follow the below steps.
  

  

Step 2
Download Highcharts and add reference of the JavaScript in your page or master page:
Add the below script
        <script src="../../Scripts/jquery-1.5.1.min.js" type="text/javascript"></script> 
        <script src="../../Scripts/highcharts.js" type="text/javascript"></script> 

Step 3
Chart Creation

Below code 
        for Mvc 
        public ActionResult Index() { 
                DotNet.Highcharts.Highcharts chart = new DotNet.Highcharts.Highcharts("chart").SetXAxis(new XAxis { 
                        Categories = new [] { 
                            "Jan", 
                            "Feb", 
                            "Mar", 
                            "Apr", 
                            "May", 
                            "Jun", 
                            "Jul", 
                            "Aug", 
                            "Sep", 
                            "Oct", 
                            "Nov", 
                            Dec " }  
                        }).SetSeries(new Series { 
                        Data = new Data(new object[] { 
                            29.9, 
                            71.5, 
                            106.4, 
                            129.2, 
                            144.0, 
                            176.0, 
                            135.6, 
                            148.5, 
                            216.4, 
                            .1, 
                            95.6, 
                            54.4 
                        }) 
                    }); 
                    return View(chart); 
                } 
                Below Code 
                for Asp.net 
                protected void Page_Load(object sender, EventArgs e) { 
                    DotNet.Highcharts.Highcharts chart = new DotNet.Highcharts.Highcharts("chart").SetXAxis(new XAxis { 
                        Categories = new [] { 
                            "Jan", 
                            "Feb", 
                            "Mar", 
                            "Apr", 
                            "May", 
                            "Jun", 
                            "Jul", 
                            "Aug", 
                            "Sep", 
                            "Oct", 
                            "Nov", 
                            "Dec" 
                        } 
                    }).SetSeries(new Series { 
                        Data = new Data(new object[] { 
                            29.9, 
                            71.5, 
                            106.4, 
                            129.2, 
                            144.0, 
                            176.0, 
                            135.6, 
                            148.5, 
                            216.4, 
                            194.1, 
                            95.6, 
                            54.4 
                        }) 
                    }); 
                    ltrChart.Text = chart.ToHtmlString(); 
                } 
    HTML Code
        For Mvc 
        @model DotNet.Highcharts.Highcharts 
        @(Model) 
        For Asp.net < asp: Content ID = "BodyContent" 
        runat = "server" 
        ContentPlaceHolderID = "MainContent" > < asp: Literal ID = "ltrChart" 
        runat = "server" > < /asp:Literal>  < /asp:Content> 

Step 4
We get the output like the below image.

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In this post, I will show you how to Built-In Logging In .NET Core. For an application, logging is very important to keep track of that application and keep it error-free.

In .NET Core, we don't need any third party logging; instead, we can use built-in logging whenever we want. This is very efficient in terms of code and performance. Now, develope a new .NET Core application and name it.

Step 1: Go to Package mManager View-->Other Windows--> Package manager Console  -->

Install-Package Microsoft.Extensions.Logging

Add Logging
Once  the extension's installed, we can add logging by adding ILogger<T> (custom logging) or ILoggerFactory. If we want to use ILoggerFactory, then we must create it using CreateLogger, to use logging add logging services under ConfigureServices. Moreover, we can use built-in logging with the other loggings (like Nlog) with very minimal code.
services.AddLogging(); 

Startup.cs
public class Startup 
    { 
        public Startup(IHostingEnvironment env) 
        { 
            var builder = new ConfigurationBuilder() 
                .SetBasePath(env.ContentRootPath) 
                .AddJsonFile("appsettings.json", optional: true, reloadOnChange: true) 
                .AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true) 
                .AddEnvironmentVariables(); 
            Configuration = builder.Build(); 
        } 
 
        public IConfigurationRoot Configuration { get; } 
 
        // This method gets called by the runtime. Use this method to add services to the container. 
        public void ConfigureServices(IServiceCollection services) 
        { 
            // Add framework services. 
            services.AddMvc(); 
            services.AddLogging(); 
        } 
 
        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline. 
        public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory) 
        { 
            loggerFactory.AddConsole(Configuration.GetSection("Logging")); 
            loggerFactory.AddDebug(); 
 
            if (env.IsDevelopment()) 
            { 
                app.UseDeveloperExceptionPage(); 
                app.UseBrowserLink(); 
            } 
            else 
            { 
                app.UseExceptionHandler("/Home/Error"); 
            } 
 
            app.UseStaticFiles(); 
 
            app.UseMvc(routes => 
            { 
                routes.MapRoute( 
                    name: "default", 
                    template: "{controller=Home}/{action=Index}/{id?}"); 
            }); 
        } 
    } 

ILoggerFactory: We can use  ILoggerFactory. For this, we must use CreateLogger.

_logger = Mylogger.CreateLogger(typeof(HomeController)); 

HomeController.cs
public class HomeController : Controller 
    { 
        private ILogger _logger; 
 
        public HomeController(ILoggerFactory Mylogger) 
        { 
            _logger = Mylogger.CreateLogger(typeof(HomeController)); 
        } 
 
        public IActionResult Index() 
        { 
            return View(); 
        } 
 
        public IActionResult About() 
        { 
            try 
            { 
                ViewData["Message"] = "Your application description page."; 
                _logger.LogInformation("About Page has been Accessed"); 
                return View(); 
            } 
            catch (System.Exception ex) 
            { 
                _logger.LogError("About: " + ex.Message); 
                throw; 
            } 
        } 
 
        public IActionResult Contact() 
        { 
            try 
            { 
                ViewData["Message"] = "Your contact page."; 
                _logger.LogInformation("Contact Page has been Accessed"); 
                return View(); 
            } 
            catch (System.Exception ex) 
            { 
                _logger.LogError("Contact: " + ex.Message); 
                throw; 
            } 
        } 
 
        public IActionResult Error() 
        { 
            return View(); 
        } 
    } 

Run and Test

LogLevel: We can add logging level by adding the level we want in appsettings.json.Trace

• Debug
• Information
• Warning
• Error
• Application failure or crashes