European ASP.NET 4.5 Hosting BLOG

BLOG about ASP.NET 4, ASP.NET 4.5 Hosting and Its Technology - Dedicated to European Windows Hosting Customer

HostForLIFE.eu Proudly Launches DotNetNuke 7.3.4 Hosting

clock December 23, 2014 07:47 by author Peter

European leading web hosting provider, HostForLIFE.eu announced support for DotNetNuke 7.3.4 hosting plan due to high demand of DotNetNuke CMS users in Europe.

HostForLIFE.eu proudly launches the support of DotNetNuke 7.3.4 on all our newest Windows Server  environment. HostForLIFE.eu DotNetNuke 7.3.4 Hosting plan starts from just as low as €3.00/month only and this plan has supported ASP.NET 5, ASP.NET MVC 5/6 and SQL Server 2012/2014.

DotNetNuke 7.3.4, as well known in the web industry and familiar among .NET developers, is a Web Content Management System (WCMS) based on Microsoft .NET platform. It is an excellent open source software that you can use to manage your website without having much technical knowledge.

HostForLIFE.eu clients are specialized in providing supports for DotNetNuke for many years. We are glad to provide support for European DotNetNuke 7.3.4 hosting users with advices and troubleshooting for our clients website when necessary.

DNN 7.3.4 is a smaller maintenance release than normal and is focused on addressing the most serious platform issues. DNN 7.3.4 addresses a number of platform issues and should be the last release before DNN 7.4.0. DNN 7.3.4 added ability to save localized lists to resource file, added method to remove all subscriptions from a ContentItem, fixed issue where AUM was not correctly handling 301 redirects, Fixed issue where popup iframe is not initialized correctly and fixed issue where multiple region/country controls in a profile did not work correctly.

DotNetNuke 7.3.4 will be a great content management system that support many advance website features such as blogs, forums, e-commerce system, photo galleries and more. DotNetNuke 7.3.4 is a great platform to build your web presence with. HostForLIFE.eu can help customize any web software that company wishes to utilize.

Further information and the full range of features DotNetNuke 7.3.4 Hosting can be viewed here http://www.hostforlife.eu/European-DotNetNuke-734-Hosting

About Company
HostForLIFE.eu is European Windows Hosting Provider which focuses on Windows Platform only. HostForLIFE.eu deliver on-demand hosting solutions including shared hosting, Reseller Hosting, Cloud Hosting, Dedicated Servers, and IT as a Service for companies of all sizes.

HostForLIFE.eu is awarded Top No#1 SPOTLIGHT Recommended Hosting Partner by Microsoft (see http://www.asp.net/hosting/hostingprovider/details/953). Our service is ranked the highest top #1 spot in several European countries, such as: Germany, Italy, Netherlands, France, Belgium, United Kingdom, Sweden, Finland, Switzerland and other European countries.



ASP.NET 5 Hosting France - HostForLIFE.eu :: Develop a Captcha Image Generator in ASP.NET

clock December 19, 2014 05:38 by author Peter

In this tutorial, I will explain you how to Develop a Captcha Image Generator in ASP.NET 5 with C# or VB.NET. CAPTCHA stands for "Completely Automated Public Turing test to tell Computers and Humans Apart".  And here is the code that I use to generate take one .aspx page as GenerateCaptcha.aspx :

GenerateCaptcha.aspx.cs:
using System.IO;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
public partial class GenerateCaptcha : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        Response.Clear();
        int height = 40;
        int width = 110;
        Bitmap bmp = new Bitmap(width, height);
        RectangleF rectf = new RectangleF(12, 6, 0, 0);
        Graphics g = Graphics.FromImage(bmp);
        g.Clear(Color.White);
        g.SmoothingMode = SmoothingMode.AntiAlias;
        g.InterpolationMode = InterpolationMode.HighQualityBicubic;
        g.PixelOffsetMode = PixelOffsetMode.HighQuality;
        g.DrawString(Session["captcha"].ToString(), new Font("Cambria", 13, FontStyle.Bold), Brushes.Red, rectf);
        g.DrawRectangle(new Pen(Color.Green), 1, 1, width - 15, height -10);
        g.Flush();
        Response.ContentType = "image/jpeg";
        bmp.Save(Response.OutputStream, ImageFormat.Jpeg);
        g.Dispose();
        bmp.Dispose();
    }
}

Take .aspx where you want to use captcha.
UseCaptcha.aspx
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Create your own captcha image generator in ASP.NET using C#.NET/VB.NET</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:ScriptManager ID="ScriptManager1" runat="server">
        </asp:ScriptManager>
        <asp:UpdatePanel ID="UpdatePanel1" runat="server">
            <ContentTemplate>
                <table>
                    <tr>
                        <td style="height: 50px; width: 100px;">
                            <asp:Image ID="imgCaptcha" runat="server" />
                        </td>
                        <td valign="middle">
                            <asp:Button ID="btnRefresh" runat="server" Text="Refresh" OnClick="btnRefresh_Click" />
                        </td>
                    </tr>
                </table>
            </ContentTemplate>
        </asp:UpdatePanel>
        Enter Captcha:
        <asp:TextBox ID="txtCaptcha" runat="server"></asp:TextBox><br />
        <asp:Button ID="btnSubmit" runat="server" Text="Submit" OnClick="btnSubmit_Click" />
    </div>
    </form>
</body>
</html>

UseCaptcha.aspx.cs
using System.Text;
using System.Drawing.Imaging;
public partial class UseCaptcha : System.Web.UI.Page
{
   protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            FillCaptcha();
        }
    }
    void FillCaptcha()
    {
        try
            Random random = new Random();
            string combination = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
            StringBuilder captcha = new StringBuilder();
            for (int i = 0; i < 6; i++)
                captcha.Append(combination[random.Next(combination.Length)]);
            Session["captcha"] = captcha.ToString();
            imgCaptcha.ImageUrl = "GenerateCaptcha.aspx";
        }
        catch
        {
            throw;
        }
    }
    protected void btnRefresh_Click(object sender, EventArgs e)
    {
        FillCaptcha();
    }
    protected void btnSubmit_Click(object sender, EventArgs e)
    {
        if (Session["captcha"].ToString() != txtCaptcha.Text)
            Response.Write("Enter Valid Captcha Code");      
        FillCaptcha();
    }
}

And this is the result from the code:



HostForLIFE.eu Proudly Launches of WordPress 4.0.1 Hosting

clock December 15, 2014 07:55 by author Peter

European leading web hosting provider, HostForLIFE.eu announced the support for WordPress 4.0.1 hosting plan due to high demand of WordPress 4.0.1 users in Europe. HostForLIFE.eu is a popular online WordPress hosting service provider catering to those people who face such issues. The company has managed to build a strong client base in a very short period of time. It is known for offering fast, fully-managed and secured services in the competitive market.

HostForLIFE.eu hosts its servers in top class data centers that is located in Amsterdam (NL), London (UK), Paris (France) and Seattle (US) to guarantee 99.9% network uptime. All data center feature redundancies in network connectivity, power, HVAC, security, and fire suppression. All hosting plans from HostForLIFE.eu include 24×7 support and 30 days money back guarantee. All hosting plans from HostForLIFE.eu include 24×7 support and 30 days money back guarantee. The customer can start hosting our Wordpress 4.0.1 site on our environment from as just low €3.00/month only.

WordPress 4.0.1 patches a critical cross-site scripting vulnerability affecting comment boxes on websites running the content management system software. An attacker would need only to inject malicious JavaScript into a comment that would infect a reader viewing it on the webpage or an admin in the management dashboard.

The update also addresses three other cross-site scripting vulnerabilities, a cross-side request forgery flaw, a denial-of-service bug related to password checks, server-side request forgery issues, and what WordPress called “an extremely unlikely hash collision” that could lead to account compromise. WordPress said it also invalidates links in a password reset email if the user remembers our password and logs in and changes our email address.

WordPress 4.0.1 addresses an additional eight security issues, including three other XSS vulnerabilities that can be exploited by a contributor or an author, a cross-site request forgery (CSRF) that can be leveraged to trick a user into changing his/her password, and a denial-of-service (DoS) bug.

HostForLIFE.eu is a popular online Windows based hosting service provider catering to those people who face such issues. The company has managed to build a strong client base in a very short period of time. It is known for offering ultra-fast, fully-managed and secured services in the competitive market. Our powerful servers are specially optimized and ensure WordPress 4.0.1 performance.

For more information about this new product, please visit http://hostforlife.eu/European-WordPress-401-Hosting

About us:
HostForLIFE.eu is awarded Top No#1 SPOTLIGHT Recommended Hosting Partner by Microsoft (see http://www.asp.net/hosting/hostingprovider/details/953). Our service is ranked the highest top #1 spot in several European countries, such as: Germany, Italy, Netherlands, France, Belgium, United Kingdom, Sweden, Finland, Switzerland and other European countries. Besides this award, we have also won several awards from reputable organizations in the hosting industry and the detail can be found on our official website.



ASP.NET 5 Hosting Italy - HostForLIFE.eu :: Using ValidationSummary Control in ASP.NET

clock December 15, 2014 06:01 by author Peter

Today, I will show you how to ValidationSummary Control in ASP.NET 5. ValidationSummary control allow us to display summary of all validation errors. We can display validation errors summary inline of a web page or a message box or both by using ShowMessageBox and ShowSummary property value true or false.

ValidationSummary will display validation messages as bulleted list, 1 paragraph or only list based on DisplayMode. we can set a header text for validation summar. ASP.NET validationsummary control have many properties to design the error messages text as like fore color, back color, border color, border style, border width, theme, skin and after all CSS class.

This ValidationSummary, allow to summarize of all validation error messages from all validators in a single location. This code below will show you how can we display all validation error messages as summary using ValidationSummary control. In this example, I used three text box and make them required field using requiredfieldvalidator control. When user submit form without entering textboxes value, they got a validation error messages summary in one location as bulleted list.

And here is the example ValidationSummaryExample.aspx code:
<%@ Page Language="C#" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
    protected void Button1_Click(object sender, System.EventArgs e) {
        Label1.Text = "Your Country: " +
            TextBox1.Text.ToString() +
            "<br />Region: " +
            TextBox2.Text.ToString() +
            "<br />City: " +
            TextBox3.Text.ToString();
    }
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>ValidationSummary example: how to use ValidationSummary control in asp.net</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:Label ID="Label1" runat="server" Font-Size="Large" ForeColor="BlueViolet"></asp:Label>
        <br /><br />
        <asp:Label ID="Label2" runat="server" Text="Country Name" AssociatedControlID="TextBox1"></asp:Label>
        <asp:TextBox ID="TextBox1" runat="server"></asp:TextBox>
        <asp:RequiredFieldValidator
             ID="RequiredFieldValidator1"
             runat="server"
             ControlToValidate="TextBox1"
             ErrorMessage='Input Country!'
             EnableClientScript="true"
             SetFocusOnError="true"
             Text="*"
             >
        </asp:RequiredFieldValidator>
        <br />
        <asp:Label ID="Label3" runat="server" Text="Region Name" AssociatedControlID="TextBox2"></asp:Label>
        <asp:TextBox ID="TextBox2" runat="server"></asp:TextBox>
        <asp:RequiredFieldValidator
             ID="RequiredFieldValidator2"
             runat="server"
             ControlToValidate="TextBox2"
             ErrorMessage='Input Region!'
             EnableClientScript="true"
             SetFocusOnError="true"
             Text="*"
             >
        </asp:RequiredFieldValidator>
        <br />       
        <asp:Label ID="Label4" runat="server" Text="City Name" AssociatedControlID="TextBox3"></asp:Label>
        <asp:TextBox ID="TextBox3" runat="server"></asp:TextBox>
        <asp:RequiredFieldValidator
             ID="RequiredFieldValidator3"
             runat="server"
             ControlToValidate="TextBox3"
            ErrorMessage='Input Region!'
            EnableClientScript="true"
            SetFocusOnError="true"
             Text="*"
             >
        </asp:RequiredFieldValidator>
        <br />
        <asp:Button ID="Button1" runat="server" Text="Submit" OnClick="Button1_Click" />
       <br /><br />
        <asp:ValidationSummary ID="ValidationSummary1" runat="server" HeaderText="Following error occurs:" ShowMessageBox="false" DisplayMode="BulletList" ShowSummary="true" />
    </div>
    </form>
</body>
</html>



European ASP.NET 4.5 Hosting - UK :: Zip File Manipulation in ASP.NET 4.5

clock December 11, 2014 08:16 by author Scott

One of the missing feature of .NET framework was a support for Zip file manipulation such as reading the zip archive, adding files, extracting files, etc. and we were using some third party libraries such as excellent the DotNetZip. In .NET 4.5, we have an extensive support for manipulating .zip files.

First thing that you should do is to add System.IO.Compression assembly as reference to your project. You may also want to reference System.IO.Compression.FileSystem assembly to access three extension methods (from the ZipFileExtensions class) for the ZipArchive class: CreateEntryFromFile,CreateEntryFromFile, and ExtractToDirectory. These extension methods enable you to compress and decompress the contents of the entry to a file.

Let’s cover the bits and pieces that we get from System.IO.Compression assembly at first. The below sample shows how to read a zip archive easily with ZipArchive class:

static void Main(string[] args) {

    const string zipFilePath = @"C:\apps\Sample Pictures.zip";

    using (FileStream zipFileToOpen = new FileStream(zipFilePath, FileMode.Open))
    using (ZipArchive archive = new ZipArchive(zipFileToOpen, ZipArchiveMode.Read)) {

        foreach (var zipArchiveEntry in archive.Entries)
            Console.WriteLine(
                "FullName of the Zip Archive Entry: {0}", zipArchiveEntry.FullName
            );
    }
}

In this sample, we are opening the zip archive and iterate through the collection of entries. When we run the application, we should see the list of files inside the zip archive:

It’s also so easy to add a new file to the zip archive:

static void Main(string[] args) {

    const string zipFilePath = @"C:\apps\Sample Pictures.zip";

    using (FileStream zipFileToOpen = new FileStream(zipFilePath, FileMode.Open))
    using (ZipArchive archive = new ZipArchive(zipFileToOpen, ZipArchiveMode.Update)) {

        ZipArchiveEntry readMeEntry = archive.CreateEntry("ReadMe.txt");
        using (StreamWriter writer = new StreamWriter(readMeEntry.Open())) {
            writer.WriteLine("Lorem ipsum dolor sit amet...");
            writer.Write("Proin rutrum, massa sed molestie porta, urna...");
        }

        foreach (var zipArchiveEntry in archive.Entries)
            Console.WriteLine(
                "FullName of the Zip Archive Entry: {0}", zipArchiveEntry.FullName
            );
    }
}

In this sample, we are adding a file named ReadMe.txt at the root of archive and then we are writing some text into that file.

Extracting files is into a folder is so easy as well. You need reference the System.IO.Compression.FileSystem assembly along with System.IO.Compression assembly as mentioned before for this sample:

static void Main(string[] args) {

    const string zipFilePath = @"C:\apps\Sample Pictures.zip";
    const string dirToExtract = @"C:\apps\Sample Pictures\";

    using (FileStream zipFileToOpen = new FileStream(zipFilePath, FileMode.Open))
    using (ZipArchive archive = new ZipArchive(zipFileToOpen, ZipArchiveMode.Update))
        archive.ExtractToDirectory(dirToExtract);
}

There are some other handy APIs as well but it is so easy to discover them by yourself. 



HostForLIFE.eu Proudly Launches ASP.NET 5 Hosting

clock December 8, 2014 10:06 by author Peter

European leading web hosting provider, HostForLIFE.eu announces the launch of ASP.NET 5  support on the recently released Windows Server 2012 R2.

HostForLIFE.eu was established to cater to an under served market in the hosting industry; web hosting for customers who want excellent service. HostForLIFE.eu – a cheap, constant uptime, excellent customer service, quality, and also reliable hosting provider in advanced Windows and ASP.NET technology. HostForLIFE.eu proudly announces the availability of the ASP.NET 5 hosting in our entire servers environment.

ASP.NET is Microsoft's dynamic website technology, enabling developers to create data-driven websites using the .NET platform and the latest version is 5 with lots of awesome features. ASP.NET 5 is a lean .NET stack for building modern web apps. Microsoft built it from the ground up to provide an optimized development framework for apps that are either deployed to the cloud or run on-premises. It consists of modular components with minimal overhead.

According to Microsoft officials, much of the functionality in the ASP.NET 5 release is a new flexible and cross-platform runtime, a new modular HTTP request pipeline, Cloud-ready environment configuration, Unified programming model that combines MVC, Web API, and Web Pages, Ability to see changes without re-building the project, etc.

HostForLIFE.eu hosts its servers in top class data centers that is located in Amsterdam (NL), London (UK), Paris (FR) and Seattle (US) to guarantee 99.9% network uptime. All data center feature redundancies in network connectivity, power, HVAC, security, and fire suppression. All hosting plans from HostForLIFE.eu include 24×7 support and 30 days money back guarantee. The customers can start hosting our ASP.NET 5 site on our environment from as just low €3.00/month only.

HostForLIFE.eu is a popular online ASP.NET  based hosting service provider catering to those people who face such issues. The company has managed to build a strong client base in a very short period of time. It is known for offering ultra-fast, fully-managed and secured services in the competitive market.

HostForLIFE.eu offers the latest European ASP.NET 5 hosting installation to all our new and existing customers. The customers can simply deploy our ASP.NET 5 website via our world-class Control Panel or conventional FTP tool. HostForLIFE.eu is happy to be offering the most up to date Microsoft services and always had a great appreciation for the products that Microsoft offers.

Further information and the full range of features ASP.NET 5 Hosting can be viewed here http://hostforlife.eu/European-ASPNET-5-Hosting

About Company
HostForLIFE.eu is European Windows Hosting Provider which focuses on Windows Platform only. HostForLIFE.eu deliver on-demand hosting solutions including Shared hosting, Reseller Hosting, Cloud Hosting, Dedicated Servers, and IT as a Service for companies of all sizes.

HostForLIFE.eu is awarded Top No#1 SPOTLIGHT Recommended Hosting Partner by Microsoft (see http://www.asp.net/hosting/hostingprovider/details/953). Their service is ranked the highest top #1 spot in several European countries, such as: Germany, Italy, Netherlands, France, Belgium, United Kingdom, Sweden, Finland, Switzerland and other European countries. Besides this award, we have also won several awards from reputable organizations in the hosting industry and the detail can be found on our official website.



ASP.NET 5 Hosting - HostForLIFE.eu :: Auto Resize Text Box in ASP.NET

clock December 5, 2014 06:53 by author Peter

In this article, we want to talk about How to to develop a simple Example of text box control with ASP.NET 5. Once we enter data during this text box control we want to the length (re-size height and width) of text box. Text box is an ASP.NET web control, use for obtaining input by user as similar to the login web site we see username and password Textbox exactly in which we enter username and password. Inside the Toolbox we obtain a textbox only drag and drop it on ASP.NET web site and then it is automatically create our html code. We think about a text box and attempt to Auto re-size it once we enter value in text box.

And this is the example code that I used:
JavaScript function for resize ASP.NET control
And here is the Text Box auto resize function.

function resizemultilineTextBox(txt) {
            txt.style.height = "1px";
            txt.style.height = (1 + txt.scrollHeight) + "px";
        }
Asp.net web page code with Textbox:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Autoresizetextboxcontrol.aspx.cs" Inherits="Autoresizetextboxcontrol" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <title></title>
        <script>
        function resizemultilineTextBox(txt) {
            txt.style.height = "1px";
            txt.style.height = (1 + txt.scrollHeight) + "px";
        }
    </script>
    <style type="text/css">
        .style1
        {
            color: #990000;
            text-decoration: underline;
            font-family: Arial, Helvetica, sans-serif;
        }
    </style>
</head>
<body>
    <form id="form2" runat="server">
        <div align="center" style="height: 123px; background-color: #6699FF">
        <h1 class="style1">Auto Resize ASP.NET TextBox Control</h1>
            <table style="width: 494px">
                <tr>
                    <td>Enter Text Here: </td>
                    <td>                      
                        <asp:TextBox ID="txtDescription" runat="server"                            

onkeyup="resizemultilineTextBox(this)" TextMode="MultiLine" Width="212px">
</asp:TextBox>                      
                    </td>
                </tr>
            </table>
        </div>
    </form>
</body>
</html>



European ASP.NET 4.5 Hosting - France :: Using HTML 5 and ASP.NET to Upload Files

clock December 4, 2014 07:03 by author Scott

ASP.NET web applications that require uploading files from the client machine to the server use the file field to select files. The selected files are uploaded to the server using form submission techniques. In addition to the file field, HTML5 also allows you to select files using drag and drop. Using this feature you can drag files from Windows Explorer or Desktop and drop them on a predefined area of a web page. The files can then be uploaded to the server. This article illustrates how the HTML5 drag and drop feature can be used to upload files on the server.  

Traditionally you use the HTML file field to select files that are to be uploaded to the server. ASP.NET web forms wrap the file field into the FileUpload server control and ASP.NET MVC applications can use an <input> element with type attribute set to file. Another alternative offered by HTML5 is dragging one or more files from Windows Explorer or Desktop and drop them onto some predefined HTML element of a web page. You can then access the dropped files using the dataTransfer object available to drag and drop events.

To understand how files can be selected using the drag and drop features of HTML5, let's develop a new ASP.NET web forms application. The HTML markup of the default web form is shown below:

<form id="form1" runat="server">
<center>
 
<div id="box">Drag & Drop files from your machine on this box.</div>
 
<br />
 
<input id="upload" type="button" value="Upload Selected Files" />
</center>
</form>

As you can see, the <form> consists of a <div> element and a button. The <div> element is intended to drop the files dragged from the local machine. Merely dropping the files won't upload them to the server. Clicking on the button initiates the file upload operation.

To handle the file drop operation you need to wire certain event handlers to the box <div> element. The following jQuery code shows how that can be done:

var selectedFiles; 

$(document).ready(function () {
  var box;
  box = document.getElementById("box");
  box.addEventListener("dragenter", OnDragEnter, false);
  box.addEventListener("dragover", OnDragOver, false);
  box.addEventListener("drop", OnDrop, false);
...
}

The code declares a global variable named selectedFiles for storing a list of selected files. The ready() function wires three event handler functions to the respective events of the box <div> element, viz. dragenter, dragover and drop using addEventListener() method. The first parameter of the addEventListener() method is the event name and the second parameter is the event handler function. The event handler functions are shown below:

function OnDragEnter(e) {
  e
.stopPropagation();
  e
.preventDefault();
} 

function OnDragOver(e) {
  e
.stopPropagation();
  e
.preventDefault();
} 

function OnDrop(e) {
  e
.stopPropagation();
  e
.preventDefault();
  selectedFiles
= e.dataTransfer.files;
  $
("#box").text(selectedFiles.length + " file(s) selected for uploading!");
}

The OnDragEnter() and OnDragOver() event handler functions are simple and they merely prevent the event bubbling of the respective events. The OnDrop() function is important since it handles the drop event. The list of files dragged and dropped on the <div> element is obtained using the files property of the dataTransfer object. The files object is of type FileList and each item of the FileList collection is of type File. These two objects are available as a part of the HTML5 File API. The OnDrop() function stores the selected files in the global variable - selectedFiles and displays a message in the <div> using the text() method that indicates the number of files selected. The following figure shows how the default web form looks after dragging and dropping files on the <div> element.

Default web form after dragging and dropping files to the <div> element

How to Send Files to the Servere?

To send the selected files from the client to the server you can use different techniques but in this example you will use jQuery $.ajax() method for uploading the files. The following code shows how $.ajax() method can be used for this purpose.

$("#upload").click(function () {
  var data = new FormData();
  for (var i = 0; i < selectedFiles.length; i++) {
    data.append(selectedFiles[i].name, selectedFiles[i]);
  }
  $.ajax({
    type: "POST",
    url: "FileHandler.ashx",
    contentType: false,
    processData: false,
    data: data,
    success: function (result) {
      alert(result);
    },
    error: function () {
      alert("There was error uploading files!");
    }
  });
});

The code shown above first creates a FormData object. The FormData object encapsulates form's data that you wish to send to the server. All the selected files are added to the FormData object using its append() method. The first parameter of the append() method is the name of the file being added and the second parameter is the File object itself. Once the FormData object is ready you make a POST request to a Generic ASP.NET Handler (FileHandler.ashx) using jQuery $.ajax() method. You will create the generic handler in the next section.

The type of the request is POST. The url is FileHandler.ashx. Notice that the processData option is set to false. By default when you use the $.ajax() method the data is sent in URL encoded format. To prevent this behavior processData is set to false. The data option  is set to the FormData object created earlier. The success function simply displays the message returned by the generic handler. The error handler function displays an error message in case there is any error while calling FileHandler.ashx.

Receive the Uploaded Files

The ASP.NET generic handler - FileHandler.ashx - receives the files sent by the $.ajax() method. The generic handler also saves them to a folder on the server. The following code shows how the handler accomplishes this task:

public void ProcessRequest(HttpContext context)
{
   
if (context.Request.Files.Count > 0)
   
{
       
HttpFileCollection files = context.Request.Files;
       
foreach (string key in files)
       
{
           
HttpPostedFile file = files[key];
           
string fileName = file.FileName;
            fileName
= context.Server.MapPath("~/uploads/" + fileName);
            file
.SaveAs(fileName);
       
}
   
}
    context
.Response.ContentType = "text/plain";
    context
.Response.Write("File(s) uploaded successfully!");
}

The ProcessRequest() method of the FileHandler.ashx is called when the files are sent to the server using the $.ajax() method. The uploaded files can be accessed using the Files collection of the Request object. Each item inside the Files collection is of type HttpPostedFile. A foreach loop iterates through all the files from the Files collection and saves the individual file using the SaveAs() method of HttpPostedFile class. Once all files are saved a success message is sent to the client.

Note that by default ASP.NET sets request length to 4096 bytes. If you wish to upload large files you may adjust the request length using web.config file as shown below:

<httpRuntime
  
maxRequestLength="20000"
  
requestValidationMode="4.5"
  
targetFramework="4.5"
  
encoderType="..." />

As you can see the maxRequestLength attribute of the <httpRuntime> section is set to 20000 bytes. You need to adjust this value as per your requirement.

That's it! You can now run the web form, drag and drop files on the <div> element and click on the "Upload Selected Files" button to upload them on the server. 



ASP.NET 5 Hosting - HostForLIFE.eu :: How to create “Remember Me” Login Page using checkbox with ASP.NET ?

clock December 1, 2014 06:12 by author Peter

In this tutorial, I will tell you How to create “Remember Me” Login Page using checkbox with ASP.NET 5 and C#. Whenever you tick Remember Me checkbox it will maintain username and password for web site user using Cookies.

When user click login button that could stores the username and password inside the cookie. First thing you need to do is confirm that the Remember Me checkbox is checked or not, if it's checked then store the username and password inside the cookie to the 1 month and if not checked then set the expiration day to 1 day in else condition to destroy the cookie.

And here is the code that I used:

protected void Page_Load(object sender, EventArgs e)  

      if (!Page.IsPostBack) 
      { 
           if (Request.Cookies["UserName"] != null) 
                txtUserName.Text = Request.Cookies["UserName"].Value; 
           if (Request.Cookies["Password"] != null) 
                txtPassword.Text = Request.Cookies["Password"].Value; 
           if (Request.Cookies["UserName"] != null && Request.Cookies["Password"] != null) 
                chkRember.Checked = true;  
      }  
}  
protected void btnLogin_Click(object sender, EventArgs e) 
 { 
       string stringconnection = ConfigurationManager.ConnectionStrings["ConnString"].ConnectionString; 
       MySqlConnection connection = new MySqlConnection(stringconnection); 
      try 
      {  
           int flag = 0; 
           if (chkRember.Checked == true) 
           { 
                Response.Cookies["UserName"].Value = txtUserName.Text; 
                Response.Cookies["Password"].Value = txtPassword.Text; 
                Response.Cookies["UserName"].Expires = DateTime.Now.AddMonths(1); 
                Response.Cookies["Password"].Expires = DateTime.Now.AddMonths(1); 
           } 
           else 
           { 
                Response.Cookies["UserName"].Expires = DateTime.Now.AddMonths(-1); 
                Response.Cookies["Password"].Expires = DateTime.Now.AddMonths(-1); 
           }  
           MySqlCommand com = new MySqlCommand("select * from tbl_user_details", connection); 
           connection.Open(); 
           if (connection.State == ConnectionState.Open) 
           { 
                MySqlDataReader objSqlDataReader;                
                objSqlDataReader = com.ExecuteReader();

                    while (objSqlDataReader.Read())                 
                     { 
                     if (objSqlDataReader[2].ToString().Equals(txtUserName.Text) && objSqlDataReader[5].ToString().Equals(txtPassword.Text)) 
                     { 
                          flag = 1; 
                          Session["UserName"] = txtUserName.Text; 
                          Session["UserType"] = objSqlDataReader[8].ToString(); 
                          Response.Redirect("ContactUs.aspx", false); 
                     } 
                     else 
                     { 
                          ClientScript.RegisterStartupScript(Page.GetType(), "validation", "<script language='javascript'>alert('Invalid Username and Password')</script>"); 
                    } 
                } 
           } 
      } 
      catch (Exception ex) 
      { 
           lblMsg.Text = ex.ToString(); 
      } 
      finally  
      { 
           connection.Close(); 
      }
 }



About HostForLIFE.eu

HostForLIFE.eu is European Windows Hosting Provider which focuses on Windows Platform only. We deliver on-demand hosting solutions including Shared hosting, Reseller Hosting, Cloud Hosting, Dedicated Servers, and IT as a Service for companies of all sizes.

We have offered the latest Windows 2012 Hosting, ASP.NET 4.5 Hosting, ASP.NET MVC 4 Hosting, ASP.NET MVC 5 Hosting and SQL 2014 Hosting.


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