Was this page helpful?
Your feedback about this content is important. Let us know what you think.
Additional feedback?
1500 characters remaining
Export (0) Print
Expand All

TableCell.AddAttributesToRender Method

Adds properties specific to the TableCell control to the list of attributes to render.

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

protected override void AddAttributesToRender(
	HtmlTextWriter writer


Type: System.Web.UI.HtmlTextWriter

The output stream that renders HTML content to the client.


A cell listed as an associated header cell was not found.

The AddAttributesToRender method overrides the base class's AddAttributesToRender method and first calls the base method and then adds the TableCell attributes corresponding to the RowSpan property, the ColumnSpan property and the AssociatedHeaderCellID property. If the AssociatedHeaderCellID property refers to a TableHeaderCell that can not be found, an HttpException is thrown.

The AddAttributesToRender method is used primarily by control developers extending the functionality of the TableCell control.

Notes to Inheritors

When overriding the AddAttributesToRender method in a derived class, be sure to call the AddAttributesToRender method of the base class so that the TableCell control attributes are properly rendered.

The following code example demonstrates how to override the AddAttributesToRender method in a custom server control so that a custom title attribute is rendered for each cell.

<%@ Page Language="C#" %>
<%@ Register TagPrefix="aspSample" Namespace="Samples.AspNet.CS.Controls" Assembly="Samples.AspNet.CS" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" 

<html xmlns="http://www.w3.org/1999/xhtml" >
<head id="Head2" runat="server">
    <title>Custom TableCell - AddAttributesToRender - C# Example</title>
    <form id="form1" runat="server">

    <h3>Custom TableCell - AddAttributesToRender - C# Example</h3>

    <asp:Table id="Table1" runat="server" 
      CellPadding="3" CellSpacing="2">
        <aspSample:CustomTableCellAddAttributesToRender Text="(0,0)" />
        <aspSample:CustomTableCellAddAttributesToRender Text="(0,1)" />
        <aspSample:CustomTableCellAddAttributesToRender Text="(0,2)" />
        <aspSample:CustomTableCellAddAttributesToRender Text="(1,0)" />
        <aspSample:CustomTableCellAddAttributesToRender Text="(1,1)" />
        <aspSample:CustomTableCellAddAttributesToRender Text="(1,2)" />

using System.Web;
using System.Security.Permissions;

namespace Samples.AspNet.CS.Controls
  [AspNetHostingPermission(SecurityAction.Demand, Level=AspNetHostingPermissionLevel.Minimal)]
  public sealed class CustomTableCellAddAttributesToRender : System.Web.UI.WebControls.TableCell
    protected override void AddAttributesToRender(System.Web.UI.HtmlTextWriter writer)
      // Write a Title attribute.
      writer.AddAttribute("title", "CustomAddAttributesToRender");

      // Call the base AddAttributesToRender method. 


.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1
© 2015 Microsoft