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Content.ContentPlaceHolderID Property

Gets or sets the ID of the ContentPlaceHolder control that is associated with the current content.

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

public string ContentPlaceHolderID { get; set; }
<asp:Content ContentPlaceHolderID="String" />

Property Value

Type: System.String
A string containing the ID of the ContentPlaceHolder associated with the current content. The default is an empty string ("").


An attempt was made to set the property at run time.

All content that is encapsulated by the Content control renders within the referenced ContentPlaceHolder control in a master page. A Content control is not added to the control hierarchy at runtime.

This property cannot be set by themes or style sheet themes. For more information, see ThemeableAttribute and ASP.NET Themes and Skins Overview.

The following code example shows how to use the ContentPlaceHolderID property of a ContentPlaceHolder control in an ASP.NET Web page.

This code example is part of a larger example provided for the Content class.

<%@ Page Language="C#" MasterPageFile="~/MasterPageSample_1cs.master" Title="Content Page"%>

    contentplaceholderid="ContentPlaceHolder1" >Hello, Master Pages!</asp:content>

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0