ASP.NET 5 Hosting - Belgium :: Filter and Sorting in GridView using DataView in ASP.NET 5

January 30, 2015 05:50 by author

In this article i will explain you how to Filter and Sorting in GridView using DataView in ASP.NET 5. First, you must create a new project and write the below code in ASP.NET:

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>Filter and Sorting in GridView using DataView</title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <table>
           <tr>
                <td>
                    Enter ID:
               </td>
                <td>
                    <asp:TextBox ID="txtId" runat="server"></asp:TextBox>
                </td>
            </tr>
            <tr>
                <td>
                    Enter User Name:
                </td>
                <td>
                    <asp:TextBox ID="txtUserName" runat="server"></asp:TextBox>
                </td>
            </tr>
            <tr>
                <td>
                    <asp:Button ID="btnSearch" runat="server" Text="Search"
                        onclick="btnSearch_Click"></asp:Button>
                </td>
            </tr>
        </table>
        <asp:GridView ID="GridFilter" runat="server" BackColor="White" BorderColor="#CC9966"
            AllowPaging="True" PageSize="5" BorderStyle="Solid" AutoGenerateColumns="False"
            BorderWidth="1px" CellPadding="4" Font-Names="Georgia" DataKeyNames="User_ID"
            Font-Size="Small" OnSorting="GridFilter_Sorting" AllowSorting="true">
            <Columns>
                <asp:BoundField DataField="User_ID" HeaderText="User_ID" SortExpression="User_ID" />       <asp:BoundField DataField="UserName" HeaderText="User Name" SortExpression="UserName" />
                <asp:BoundField DataField="Gender" HeaderText="Gender" SortExpression="Gender" />
                <asp:BoundField DataField="Country" HeaderText="Country" SortExpression="Country" />
            </Columns>
            <FooterStyle BackColor="Tan" />
            <FooterStyle BackColor="#FFFFCC" ForeColor="#330099" />
            <HeaderStyle BackColor="#990000" Font-Bold="True" ForeColor="#FFFFCC" />
        </asp:GridView>
    </div>
    </form>
</body>
</html>

C#
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
public partial class GridRowFilter : System.Web.UI.Page
{
    DataSet ds;
    protected void Page_Load(object sender, EventArgs e)
    {
       if (!IsPostBack)
        {
            GridFilter.DataSource = BindUsers();
            GridFilter.DataBind();
        }
    }
    private DataSet BindUsers()
    {
        ds = new DataSet();
        SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["con"].ConnectionString);
        SqlCommand cmd = new SqlCommand("Select User_ID,UserName,Gender,Country from User_Details", con);
        SqlDataAdapter da = new SqlDataAdapter(cmd);
        da.Fill(ds);
        return ds;
    }
    protected void btnSearch_Click(object sender, EventArgs e)
    {
        try
        {
            ds = BindUsers();
            DataTable dt = new DataTable();
            dt = ds.Tables[0];
            DataView dvData = dt.DefaultView;
            string strFilter = " 1=1 ";
            if (!string.IsNullOrEmpty(txtId.Text))
                strFilter = strFilter + " And User_ID = " + Convert.ToInt32(txtId.Text);
            if (!string.IsNullOrEmpty(txtUserName.Text))
                strFilter = strFilter + " And UserName Like '%" + txtUserName.Text + "%'";            dvData.RowFilter = strFilter;
            GridFilter.DataSource = dvData;
            GridFilter.DataBind();
        }
        catch (Exception ex)
        {
            throw ex;
        }
    }
    protected void GridFilter_Sorting(object sender,GridViewSortEventArgs e)
    {
        try
        {
            DataSet ds = BindUsers();
            DataTable dt = new DataTable();
            dt = ds.Tables[0];
            DataView dvData = dt.DefaultView;
            if (ViewState["SortDirection"] != null && ViewState["SortDirection"].ToString() != "")
                dvData.Sort = e.SortExpression + " " + ConvertSortDirection(ViewState["SortDirection"].ToString());
            else
                dvData.Sort = e.SortExpression + " " + ConvertSortDirection("ASC");
            GridFilter.DataSource = dvData;
            GridFilter.DataBind();
        }
        catch (Exception ex)
        {
            throw ex;        }
    }
    private string ConvertSortDirection(string sortDireciton)
    {
        try
        {
            if (sortDireciton != null)
            {
                switch (sortDireciton)
                {
                    case "ASC":
                        ViewState["SortDirection"] = "DESC";
                        break;
                    case "DESC":
                        ViewState["SortDirection"] = "ASC";
                        break;
                }
            }
            return sortDireciton;
        }
        catch (Exception err)
        {
            throw err;
        }
    }
}

In VB.NET
Imports System.Collections.Generic
Imports System.Linq
Imports System.Web
Imports System.Web.UI
Imports System.Web.UI.WebControls
Imports System.Data
Imports System.Data.SqlClient
Imports System.Configuration
Partial Public Class GridRowFilter
    Inherits System.Web.UI.Page
    Private ds As DataSet
    Protected Sub Page_Load(sender As Object, e As EventArgs)
        If Not IsPostBack Then
            GridFilter.DataSource = BindUsers()
            GridFilter.DataBind()
        End If
    End Sub
    Private Function BindUsers() As DataSet
        ds = New DataSet()
        Dim con As New SqlConnection(ConfigurationManager.ConnectionStrings("con").ConnectionString)        Dim cmd As New SqlCommand("Select User_ID,UserName,Gender,Country from User_Details", con)        Dim da As New SqlDataAdapter(cmd)
        da.Fill(ds)
        Return ds
    End Function
   Protected Sub btnSearch_Click(sender As Object, e As EventArgs)
        Try
            ds = BindUsers()
            Dim dt As New DataTable()
            dt = ds.Tables(0)
            Dim dvData As DataView = dt.DefaultView
            Dim strFilter As String = " 1=1 "
            If Not String.IsNullOrEmpty(txtId.Text) Then
                strFilter = strFilter & " And User_ID = " & Convert.ToInt32(txtId.Text)
            End If
            If Not String.IsNullOrEmpty(txtUserName.Text) Then
                strFilter = (strFilter & " And UserName Like '%") + txtUserName.Text & "%'"
            End If
            dvData.RowFilter = strFilter
            GridFilter.DataSource = dvData
            GridFilter.DataBind()
        Catch ex As Exception
            Throw ex
        End Try
    End Sub
    Protected Sub GridFilter_Sorting(sender As Object, e As GridViewSortEventArgs)
        Try
            Dim ds As DataSet = BindUsers()
            Dim dt As New DataTable()
            dt = ds.Tables(0)
            Dim dvData As DataView = dt.DefaultView
            If ViewState("SortDirection") IsNot Nothing AndAlso ViewState("SortDirection").ToString() <> "" Then
                dvData.Sort = e.SortExpression & " " & ConvertSortDirection(ViewState("SortDirection").ToString())
            Else
                dvData.Sort = e.SortExpression & " " & ConvertSortDirection("ASC")
            End If
            GridFilter.DataSource = dvData
            GridFilter.DataBind()
        Catch ex As Exception
            Throw ex
        End Try
    End Sub
   Private Function ConvertSortDirection(sortDireciton As String) As String
        Try
            If sortDireciton IsNot Nothing Then
                Select Case sortDireciton
                    Case "ASC"
                        ViewState("SortDirection") = "DESC"
                        Exit Select
                    Case "DESC"
                        ViewState("SortDirection") = "ASC"
                        Exit Select
                End Select
            End If
            Return sotDireciton
        Catch err As Exception
            Throw err
       End Try
    End Function
End Class

HostForLIFE.eu ASP.NET 5 Hosting
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 customers from around the globe, spread across every continent. We serve the hosting needs of the business and professional, government and nonprofit, entertainment and personal use market segments.

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HostForLIFE.eu Proudly Launches Sitefinity 7.3 Hosting

January 26, 2015 10:08 by author

Peter

HostForLIFE.eu, a leading web hosting provider, has leveraged its gold partner status with Microsoft to launch its latest Sitefinity 7.3 Hosting support.

European Recommended Windows and ASP.NET Spotlight Hosting Partner in Europe, HostForLIFE.eu, has announced the availability of new hosting plans that are optimized for the latest update of the Sitefinity 7.3 hosting technology.

HostForLIFE.eu supports Sitefinity 7.3 hosting on our latest Windows Server and this service is available to all our new and existing customers. Sitefinity 7.3 offers a natural extension to all customer SharePoint workflows and wrap a compelling presentation around client core business documents. Contextual task-oriented approach to organizing documentation on any topic.

HostForLIFE.eu hosts its servers in top class data centers that is located in Amsterdam, London, Paris 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 Sitefinity 7.3 site on our environment from as just low €3.00/month only.

Sitefinity 7.3 is a Web Content and Experience Management Platform that enables business to engage, convert and retain customers through multiple channels. Sitefinity 7.3 is the only truly mobile web content management on the market that supports all three mobile strategies out of the box – responsive design, mobile apps and mobile sites.

Sitefinity 7.3’s intuitive user interface delights both developers and business users alike, making it a more efficient environment to get more work done faster. There’s no long training required, so even new non-technical users will be up and running in no time. Because it’s built on a modern code-base, Sitefinity is best equipped to meet the long term needs of today’s expanding businesses, including tackling challenges like mobile, ecommerce, multisite management, content personalization, and so much more.

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 Sitefinity 7.3 performance.

For more information about this new product, please visit http://hostforlife.eu/European-Sitefinity-73-Hosting

About HostForLIFE.eu :
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.

Tags: best sitefinity 7.3 hosting, cheap sitefinity 7.3 hosting, recommended sitefinity 7.3 hosting, sitefinity 7.3 hosting, top sitefinity 7.3 hosting
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ASP.NET 5 Hosting Germany - HostForLIFE.eu :: Create Validation Control Error Messages with Alert Box in ASP.NET 5

January 26, 2015 06:23 by author

Peter

At this short article, we will Create validation control's Error messages in Alert box in ASP.NET 5. First step, you need to know about how to show validation control's Error messages in Alert box in ASP.NET. Then, write the following code:

ASP.NET
<%@ Register Assembly="AjaxControlToolkit" Namespace="AjaxControlToolkit" TagPrefix="ajax" %>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>How to show validation control's Error messages in Alert box in ASP.NET</title>
</head>
<body>
    <form id="form1" runat="server">
    <table>
        <tr>
            <td>
                <asp:Label ID="lblName" runat="server" Text="Name"></asp:Label>
            </td>
            <td>
                <asp:TextBox ID="txtName" runat="server" ValidationGroup="Validation"></asp:TextBox>
                <asp:RequiredFieldValidator ID="rfvName" runat="server" ControlToValidate="txtName"
                    Display="None" ErrorMessage="Name is Required" ValidationGroup="Validation"></asp:RequiredFieldValidator>
            </td>
        </tr>
        <tr>
            <td>
                <asp:Label ID="lblGender" runat="server" Text="Gender"></asp:Label>
            </td>
            <td>
                <asp:DropDownList ID="ddlGender" runat="server" ValidationGroup="Validation">
                    <asp:ListItem Selected="True" Value="0">--Select--</asp:ListItem>
                    <asp:ListItem Value="1">Male</asp:ListItem>
                    <asp:ListItem Value="2">Female</asp:ListItem>
                </asp:DropDownList>
                <asp:CompareValidator ID="CVGender" runat="server" ControlToValidate="ddlGender"
                    Display="None" ErrorMessage="Gender is Required" Operator="NotEqual" ValidationGroup="Validation"
                    ValueToCompare="0"></asp:CompareValidator>
            </td>
        </tr>
        <tr>
            <td>
                <asp:Label ID="lblEmail" runat="server" Text="Email Address"></asp:Label>
            </td>
            <td>
                <asp:TextBox ID="txtEmail" runat="server" ValidationGroup="Validation"></asp:TextBox>
                <asp:RegularExpressionValidator ID="regEmail" runat="server" ControlToValidate="txtEmail"
                    Display="None" ValidationGroup="Validation" ErrorMessage="Enter Valid Email address "
                    ValidationExpression="^([a-zA-Z][\w\.-]*[a-zA-Z0-9]@[a-zA-Z0-9][\w\.-]*[a-zA-Z0-9]\.[a-zA-Z][a-zA-Z\.]*[a-zA-Z]){1,70}$">
                </asp:RegularExpressionValidator>
            </td>
        </tr>
        <tr>
            <td>
                <asp:Label ID="lblValidation" runat="server" Text="* Marked fields are mandatory"
                    ForeColor="Red"></asp:Label>
            </td>
        </tr>
        <tr>
            <td colspan="2">
                <asp:Button ID="btnShowAlert" runat="server" Text="Show Alert" ValidationGroup="Validation" />
                <asp:ValidationSummary ID="ValidationSummary1" runat="server" ShowMessageBox="True"
                    ShowSummary="False" ValidationGroup="Validation" />
            </td>
        </tr>
    </table>
    </form>
</body>
</html>

And here is the result:

HostForLIFE.eu ASP.NET 5 Hosting
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 customers from around the globe, spread across every continent. We serve the hosting needs of the business and professional, government and nonprofit, entertainment and personal use market segments.

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ASP.NET 5 Hosting Germany - HostForLIFE.eu :: Create DropDownList Validation with JQuery JavaScript In ASP.NET

January 19, 2015 07:19 by author

Peter

This article will explain you how Create DropDownList Validation with JQuery JavaScript in ASP.NET 5 where DropDown is either bind with SqlDataSource or listItems. Place one drop down and button on the page in design view and add JQuery javascript file in solution and add it's reference in head section of page. Then, Write following JQuery script in head section of page.

<head runat="server">
<title></title>
<script src="Scripts/jquery-1.7.2.min.js" type="text/javascript"></script>
<script type="text/javascript" language="javascript">
$(document).ready(function() {
$('#Button1').on('click', function(e) {
var selectedText = $('#DropDownList1
option:selected').text().toLowerCase();
if (selectedText == 'select')
{
alert('Please select any language.');
e.preventDefault();
}
else
alert('You selected ' + selectedText);
       })
})
</script>
</head>

HTML Code for Drop Down And Button
<asp:DropDownList ID="DropDownList1" runat="server">
<asp:ListItem>Select</asp:ListItem>
<asp:ListItem>C#</asp:ListItem>
<asp:ListItem>VB</asp:ListItem>
<asp:ListItem>Java</asp:ListItem>
<asp:ListItem>C</asp:ListItem>
</asp:DropDownList>
<asp:Button ID="Button1" runat="server" Text="Button" />

Now if DropDownList is obtaining populated from database by SqlDataSource then we'd like to line AppendDataBoundItems property of dropdown to true and add one list item with text choose at 0th index in Page_Load event.
<asp:DropDownList ID="DropDownList2" runat="server"
AppendDataBoundItems="True"
DataSourceID="SqlDataSource1"
DataTextField="ProductName"
DataValueField="ProductID">
</asp:DropDownList>
<asp:SqlDataSource ID="SqlDataSource1" runat="server"
ConnectionString="<%$ ConnectionStrings:TestDbConnectionString %>"
SelectCommand="SELECT [ProductID], [ProductName] FROM [Products]">
</asp:SqlDataSource>
<asp:Button ID="Button2" runat="server" Text="Button" />

Next step, write the following code in code behind.
protected void Page_Load(object sender, EventArgs e)
    {
        DropDownList2.Items.Add(new ListItem("select", "0"));
    }

Then write following JQuery code in head section of html source of page.
<script type="text/javascript" language="javascript">
$(document).ready(function() {
$('#Button2').on('click', function(e) {
var selectedValue = $('#DropDownList2').val();
if (selectedValue == 0)
{
alert('Please select any product.');
e.preventDefault();
}
else
alert('you selected product with ID ' + selectedValue);
})
})
</script>

If you wanna use the JavaScript code Instead of Jquery then write the following code:
<script type="text/javascript">
function Validation() {
var selectedValue =       document.getElementById('<%=DropDownList2.ClientID%>').value;
if (selectedValue == "0")
{
alert("Please Select Product");
}
else {
alert("You selected " + selectedValue);
}
}
</script>

Finally, Call the function bellow in OnClientClick Event of button:
<asp:Button ID="Button2" runat="server" Text="Button" OnClientClick="Validation>

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 customers from around the globe, spread across every continent. We serve the hosting needs of the business and professional, government and nonprofit, entertainment and personal use market segments.

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ASP.NET 5 Hosting Spain - HostForLIFE.eu :: Sending Data to Another Page Using jQuery with QueryString in ASP.NET 5

January 12, 2015 06:37 by author

Administrator

With this article, I will tell you about sending data to another page using jQuery with QueryString in ASP.NET 5. The page PassDataJQueryQueryString.aspx (Source Page), this is the page from where we want to send the data (value). The page consists of an TextBox for Name ,TextBox for Qualification and DropDownList for Technology whose values we need to send to the other page ( In this tutorial I named it: DestinationPage.aspx).

Source Page(PassDataJQueryQueryString.aspx)
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title> Sending Data to Another Page Using jQuery with QueryString in ASP.NET 5</title>
    <script type="text/javascript" src="http://code.jquery.com/jquery-1.8.2.js"></script>
    <script type="text/javascript">
        $(document).ready(function () {
            $("#btnSubmit").click(function () {
                var url = "DestinationPage.aspx?name=" + encodeURIComponent($("#txtName").val()) + "&Qualification=" + encodeURIComponent($("#txtQualification").val()) + "&technology=" + encodeURIComponent($("#ddlTechnology").val());
                window.location.href = url;
                return false;
            });
        });
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <table>
            <tr>
                <td>
                    Name
                </td>
                <td>
                    :
                </td>
                <td>
                    <asp:TextBox ID="txtName" runat="server"></asp:TextBox>
                </td>
            </tr>
            <tr>
                <td>
                    Qualification
                </td>
                <td>
                    :
                </td>
                <td>
                    <asp:TextBox ID="txtQualification" runat="server"></asp:TextBox>
                </td>
            </tr>
            <tr>
                <td>
                    Technology
                </td>
                <td>
                    :
                </td>
                <td>
                    <asp:DropDownList ID="ddlTechnology" runat="server">
                        <asp:ListItem Value=".NET" Text=".NET">
                        </asp:ListItem>
                        <asp:ListItem Value="Java" Text="Java">
                        </asp:ListItem>
                        <asp:ListItem Value="PHP" Text="PHP">
                        </asp:ListItem>
                        <asp:ListItem Value="SAP" Text="SAP">
                        </asp:ListItem>
                    </asp:DropDownList>
                </td>
            </tr>
            <tr>
                <td colspan="3">
                    <asp:Button ID="btnSubmit" runat="server" Text="Submit" />
                </td>
            </tr>
        </table>
    </div>
    </form>
</body>
</html>

Destination Page(DestinationPage.aspx):
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
    <script type="text/javascript" src="http://code.jquery.com/jquery-1.8.2.js"></script>
    <script type="text/javascript">
        var getData = new Array();
        $(function () {
            if (getData.length == 0) {
                if (window.location.search.split('?').length > 1) {
                    var params = window.location.search.split('?')[1].split('&');
                    for (var i = 0; i < params.length; i++) {
                        var key = params[i].split('=')[0];
                        var value = decodeURIComponent(params[i].split('=')[1]);
                        getData [key] = value;
                    }
                }
            }
            if (getData["name"] != null && getData["Qualification"] != null && getData["technology"] != null) {
                var data = "<u>Values in Previous Page</u><br /><br />";
                var name;
                name = getData["name"];
                $("#lblName").html(name);
                var qualification;
                qualification = getData["Qualification"];
                $("#lblQualification").html(qualification);
                var technology;
                technology = getData["technology"];
                $("#lblTechnology").html(technology);
            }
        });
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <table>
            <tr>
                <td>
                    Name
                </td>
                <td>
                    :
                </td>
                <td>
                    <asp:Label ID="lblName" runat="server"></asp:Label>
                </td>
            </tr>
            <tr>
                <td>
                    Qualification
                </td>
                <td>
                    :
                </td>
                <td>
                    <asp:Label ID="lblQualification" runat="server"></asp:Label>
                </td>
           </tr>
            <tr>
                <td>
                    Technology
                </td>
               <td>
                    :
                </td>
                <td>
                    <asp:Label ID="lblTechnology" runat="server"></asp:Label>
                </td>
            </tr>
        </table>
    </div>
    </form>
</body>
</html>

And this is the output:

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ASP.NET 5 Hosting Italy - HostForLIFE.eu :: How to Create ImageButton Control in ASP.NET ?

January 9, 2015 05:35 by author

Peter

With this post, I will tell you how to create ImageButton Control in ASP.NET 5. First, you need to declare ASP.NET ImageButton Control. Declare the ImageButton by the below code with property,As like Alternative text, ImageUrl,Height,Width.Image Button is predefined Asp.net web control Use in web development.

Declare ImageButton by fallowing code with property,As like Alternative text, ImageUrl,Height,Width.Image Button is predefined Asp.net web control Use in web development.
And here is the code:
<asp:ImageButton id="imagebutton1" runat="server"
    AlternateText="ImageButton 1"
    ImageAlign="left"
    ImageUrl="~/Images/image1.jpg"
    OnClick="ImageButton_Click" Height="148px" Width="274px"/>

For Access ImageButton by javascript we use following code:
<script language="C#" runat="server">
void ImageButton_Click(object sender, ImageClickEventArgs e)
      {
         Label1.Text = "You clicked ImageButton control at the coordinates: (" +
                       e.X.ToString() + ", " + e.Y.ToString() + ")";
      }
   </script>
The JavaScript code we get clicked position in Image.and print this on the Label Text.

Code of ASP.NET Image Control:
<%@ Page Language="C#" AutoEventWireup="True" %>
<!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>
    <title>ImageButton Sample</title>
<script language="C#" runat="server">
      void ImageButton_Click(object sender, ImageClickEventArgs e)
      {
         Label1.Text = "You clicked ImageButton control at the coordinates: (" +
                       e.X.ToString() + ", " + e.Y.ToString() + ")";
      }
</script>
</head>
<body style="height: 261px">
   <form id="form1" runat="server">
      <h3>ImageButton Example:</h3>
      Click Anywhere on the image.<br /><br />
      <asp:ImageButton id="imagebutton1" runat="server"
           AlternateText="ImageButton 1"
           ImageAlign="left"
           ImageUrl="~/Images/Image1.jpg"
           OnClick="ImageButton_Click" Height="148px" Width="274px"/>
      <br />
      <br />
      <br />
      <asp:label id="Label1" runat="server"/>
      <br />
   </form>
</body>
</html>

Finally, this is the result:

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ASP.NET 5 Hosting Russia - HostForLIFE.eu :: How to Preview Image Before Upload with jQuery in ASP.NET ?

January 5, 2015 05:13 by author

Peter

With this article, I will explain you how to preview image before upload with jQuery using FileUpload in ASP.NET 5. While for the browsers that support HTML5 i.e. Internet Explorer, Mozilla FireFox, Google Chrome and Opera, the image preview will display usingHTML5 FileReader API. Preview image before upload using FileUpload control and jQuery in ASP.NET.

Method 1:
In this method 1, we will use the code below
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <title>Preview image before upload using FileUpload control and jQuery in ASP.NET </title>
    <script src="http://code.jquery.com/jquery-1.10.2.min.js" type="text/javascript"></script>
    <script type="text/javascript">
        function PreviewImageBeforeUpload(Imagepath) {
            if (Imagepath.files && Imagepath.files[0]) {
                var Filerdr = new FileReader();
                Filerdr.onload = function (e) {
                    $('#ImagePreview').attr('src', e.target.result);
                }
                Filerdr.readAsDataURL(Imagepath.files[0]);
            }
        }
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:FileUpload ID="FilePreview" runat="server" onchange="PreviewImageBeforeUpload(this);" />
        <br />
        <asp:Image ID="ImagePreview" runat="server" Width="150px" Height="150px" />
        <asp:Button ID="btnSubmit" runat="server" Text="Upload" />
    </div>
    </form>
</body>
</html>

Next, Method 2 will using the DXImageTransform filter CSS property in browsers that don’t support HTML5 i.e. Internet Explorer 8 and 9.

Method 2:
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
    <title>Preview image before upload using FileUpload control and jQuery in ASP.NET
    </title>
    <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
    <script language="javascript" type="text/javascript">
        $(function () {
            $("#FilePreview").change(function () {
                $("#ImagePreview").html("");
                var regex = /^([a-zA-Z0-9\s_\\.\-:])+(.jpg|.jpeg|.gif|.png|.bmp)$/;
                if (regex.test($(this).val().toLowerCase())) {
                    if ($.browser.msie && parseFloat(jQuery.browser.version) <= 9.0) {
                        $("#ImagePreview").show();
                        $("#ImagePreview")[0].filters.item("DXImageTransform.Microsoft.AlphaImageLoader").src = $(this).val();
                   }
                    else {

                        $("#ImagePreview").show();
                        $("#ImagePreview").append("<img />");
                        var Filerdr = new FileReader();
                        Filerdr.onload = function (e) {
                            $("#ImagePreview img").attr("src", e.target.result);
                        }
                        Filerdr.readAsDataURL($(this)[0].files[0]);
                    }
                } else {
                    alert("Please upload a valid image file.");
                }
            });
        });
    </script>
</head>
<body>
    <form id="form1" runat="server">
    <div>
        <asp:FileUpload ID="FilePreview" runat="server" />
        <br />
        <div id="ImagePreview" style="width: 150px; height: 150px">
        </div>
        <asp:Button ID="btnSubmit" runat="server" Text="Upload" />
    </div>
    </form>
</body>
</html>

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