ASP.NET Tutorial/Validation/Error Highlight

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Highlighting Validation Errors

   <source lang="csharp">

<%@ Page Language="C#" %> <!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>Validation Image</title>

</head> <body>

   <form id="form1" runat="server">
   <asp:Label
       id="lblFirstName"
       Text="First Name"
       AssociatedControlID="txtFirstName"
       Runat="server" />
   
<asp:TextBox id="txtFirstName" Runat="server" /> <asp:RequiredFieldValidator id="reqFirstName" ControlToValidate="txtFirstName" Text="<img src="Error.gif" alt="First name is required." />" Runat="server" />

<asp:Button id="btnSubmit" Text="Submit" Runat="server" />
   </form>

</body> </html></source>