CheckBoxList.Render Method

Displays the CheckBoxList on the client.

Namespace: System.Web.UI.WebControls
Assembly: System.Web (in system.web.dll)

protected public:
virtual void Render (
	HtmlTextWriter^ writer
) override
protected void Render (
	HtmlTextWriter writer
)
protected internal override function Render (
	writer : HtmlTextWriter
)
Not applicable.

Parameters

writer

A System.Web.UI.HtmlTextWriter that contains the output stream for rendering on the client.

The Render method is used primarily by control developers, when deriving a custom control from the CheckBoxList class.

The Render implementation for a CheckBoxList control initializes a RepeatInfo object for the list, and calls the RenderRepeater method, which in turn uses the RenderItem method to render individual check box list items.

The following code example demonstrates how to override the Render method in a custom server control so that the CheckBoxList always displays an image.

No code example is currently available or this language may not be supported.
<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.JSL.Controls" Assembly="Samples.AspNet.JSL" %>
<%@ Page language="VJ#" %>
<!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>Custom CheckBoxList - Render - VJ# Example</title>
  </head>
  <body>
    <form id="Form1" method="post" runat="server">
      <h3>Custom CheckBoxList - Render - VJ# Example</h3>

      <aspSample:CustomCheckBoxListRender
        id="CheckBoxList1" runat="server">
        <asp:ListItem Selected="True">Item 1</asp:ListItem>
        <asp:ListItem>Item 2</asp:ListItem>
        <asp:ListItem>Item 3</asp:ListItem>
        <asp:ListItem>Item 4</asp:ListItem>
        <asp:ListItem>Item 5</asp:ListItem>
        <asp:ListItem>Item 6</asp:ListItem>
      </aspSample:CustomCheckBoxListRender>

    </form>
  </body>
</html>

	...

package Samples.AspNet.JSL.Controls;

public class CustomCheckBoxListRender
    extends System.Web.UI.WebControls.CheckBoxList
{
    protected void Render(System.Web.UI.HtmlTextWriter writer)
    {
        // Create and render a new Image Web control.
        System.Web.UI.WebControls.Image image = 
            new System.Web.UI.WebControls.Image();
        image.set_ID("Image1");
        image.set_ImageUrl("image.jpg");
        image.set_AlternateText("Image for CheckBoxList1.");
        image.RenderControl(writer);
        // Call the base class's Render method.
        super.Render(writer);
    } //Render
} //CustomCheckBoxListRender

Windows 98, Windows Server 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

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