RegularExpressionValidator.AddAttributesToRender Method
Assembly: System.Web (in system.web.dll)
protected void AddAttributesToRender ( HtmlTextWriter writer )
protected override function AddAttributesToRender ( writer : HtmlTextWriter )
Parameters
- writer
An HtmlTextWriter that represents the output stream to render HTML content on the client.
The following code example demonstrates how to override the AddAttributesToRender method in a custom server control so that the RegularExpressionValidator error message always displays as bold.
package Samples.AspNet.JSL.Controls;
public class CustomRegularExpressionValidatorAddAttributesToRender
extends System.Web.UI.WebControls.RegularExpressionValidator
{
protected void AddAttributesToRender(System.Web.UI.HtmlTextWriter writer)
{
// Show the CompareValidator's error message as bold.
writer.AddStyleAttribute(System.Web.UI.HtmlTextWriterStyle.FontWeight,
"bold");
// Call the Base's AddAttributesToRender method.
super.AddAttributesToRender(writer);
} //AddAttributesToRender
} //CustomRegularExpressionValidatorAddAttributesToRender
The following code example demonstrates how to use the use the CustomRegularExpressionValidatorAddAttributesToRender control, defined in the preceding example, on a Web Forms page.
<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.JSL.Controls" Assembly="Samples.AspNet.JSL" %>
<%@ Page Language="VJ#" AutoEventWireup="True" %>
<HTML>
<HEAD>
<title>Custom RegularExpressionValidator - AddAttributesToRender - VJ# Example</title>
<script runat="server">
void Button1_Click(Object sender, EventArgs e)
{
if (get_Page().get_IsValid()) {
Label1.set_Text("Page is valid.");
}
else {
Label1.set_Text("Page is invalid!");
}
} //Button1_Click
</script>
</HEAD>
<body>
<form id="Form1" method="post" runat="server">
<h3>Custom RegularExpressionValidator - AddAttributesToRender - VJ# Example</h3>
<table bgcolor="#eeeeee" cellpadding="10">
<tr valign="top">
<td colspan="3">
<asp:Label ID="Label1"
Text="Enter a 5 digit zip code"
runat="server"/>
</td>
</tr>
<tr>
<td colspan="3">
<b>Personal Information</b>
</td>
</tr>
<tr>
<td align="right">
Zip Code:
</td>
<td>
<asp:TextBox id="TextBox1" runat="server"/>
</td>
<td>
<aspSample:CustomRegularExpressionValidatorAddAttributesToRender
id="Regularexpressionvalidator1"
runat="server"
ControlToValidate="TextBox1"
ValidationExpression="\d{5}"
ErrorMessage="Zip code must be 5 numeric digits"
Display="Static"
EnableClientScript="False" />
</td>
</tr>
<tr>
<td></td>
<td>
<asp:Button text="Button1"
OnClick="Button1_Click"
runat=server ID="Button1"/>
</td>
<td></td>
</tr>
</table>
</form>
</body>
</HTML>
Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.