ValidationSummary.Render Method
.NET Framework 2.0
This method supports the .NET Framework infrastructure and is not intended to be used directly from your code.
Sends server control content to a provided HtmlTextWriter object, which writes the content to be rendered on the client.
Namespace: System.Web.UI.WebControlsAssembly: System.Web (in system.web.dll)
The following code example demonstrates how to override the Render method in a custom server control so that the ValidationSummary control is surrounded by a Small tag.
<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.JSL.Controls" Assembly="Samples.AspNet.JSL" %>
<%@ Page Language="VJ#" AutoEventWireup="True" %>
<HTML>
<HEAD>
<title>Custom ValidationSummary - Render - VJ# Example</title>
</HEAD>
<body>
<form id="Form1" method="post" runat="server">
<h3>Custom ValidationSummary - Render - VJ# Example</h3>
<TABLE id="Table1" cellPadding="4" cellspacing="0">
<TR>
<TD>
<TABLE id="Table2" cellPadding="4" cellspacing="0" bgColor="#eeeeee">
<TR>
<TD colSpan="3"><B>Credit Card Information</B> </TD>
</TR>
<TR>
<TD align="right">Card Type: </TD>
<TD>
<asp:RadioButtonList id="RadioButtonList1" runat="server" RepeatLayout="Flow">
<asp:ListItem>MasterCard</asp:ListItem>
<asp:ListItem>Visa</asp:ListItem>
</asp:RadioButtonList>
</TD>
<TD align="center" rowSpan="1">
<asp:RequiredFieldValidator
id="RequiredFieldValidator1"
runat="server"
ErrorMessage="Card Type"
Width="100%"
Display="Static"
ControlToValidate="RadioButtonList1">*
</asp:RequiredFieldValidator>
</TD>
</TR>
<TR>
<TD align="right">Card Number: </TD>
<TD><asp:TextBox id="TextBox1" runat="server"></asp:TextBox></TD>
<TD>
<asp:RequiredFieldValidator
id="RequiredFieldValidator2"
runat="server"
ErrorMessage="Card Number"
Width="100%"
Display="Static"
ControlToValidate="TextBox1">*
</asp:RequiredFieldValidator>
</TD>
</TR>
<TR>
<TD></TD>
<TD><asp:Button id="Button1" runat="server" text="Validate"></asp:Button></TD>
<TD></TD>
</TR>
</TABLE>
</TD>
</TR>
<TR>
<TD vAlign="top">
<aspSample:CustomValidationSummaryRender
id="ValidationSummary1"
runat="server"
DisplayMode="BulletList"
HeaderText="You must enter a value in the following fields:" />
</TD>
</TR>
</TABLE>
</form>
</body>
</HTML>
...package Samples.AspNet.JSL.Controls;
public class CustomValidationSummaryRender
extends System.Web.UI.WebControls.ValidationSummary
{
protected void Render(System.Web.UI.HtmlTextWriter writer)
{
// Write out begining Small HTML tag.
writer.RenderBeginTag(System.Web.UI.HtmlTextWriterTag.Small);
// Call the base class's Render method.
super.Render(writer);
// Write out ending Small HTML tag.
writer.RenderEndTag();
} //Render
} //CustomValidationSummaryRender
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.
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