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Tuesday, December 29, 2015
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ASP.NET : How to use image in error message in validation Control

12:41 AMTuesday, December 29, 2015
If you are generating error  message to the client side then you can use any type of validation in given ToolBox such as RequiredField validator , compare validator , custom validator etc. If you want to use Image for easy understand then you should insert image in Text property of the validation control.

 <asp:RequiredFieldValidator  ControlToValidate ="TextBox1" Text="<img width='40px' height='40px' src='error.jpg' />" ID="RequiredFieldValidator1" runat="server" ErrorMessage="RequiredFieldValidator"></asp:RequiredFieldValidator>


Here we have used HTML Image Tag inside Text property of control.
Example
<%@ Page Language="C#" %>

<!DOCTYPE html>

<script runat="server">

</script>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title></title>
</head>
<body>
    <form id="form1" runat="server">
    <div>
     <asp:TextBox ID="TextBox1" runat="server" Width="201px"></asp:TextBox>
        <asp:RequiredFieldValidator  ControlToValidate ="TextBox1" Text="<img width='40px' height='40px' src='error.jpg' />" ID="RequiredFieldValidator1" runat="server" ErrorMessage="RequiredFieldValidator"></asp:RequiredFieldValidator>

        <asp:Button ID="Button1" runat="server" Text="Check RequiredField" />
    </div>
    </form>
</body>
</html>


Output
ASP.NET : How to use image in error message in validation Control

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