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ScriptManager.RegisterClientScriptInclude Method (Page, Type, String, String)

Registers client script with the ScriptManager control every time that an asynchronous postback occurs, and then adds a script file reference to the page.

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

public static void RegisterClientScriptInclude(
	Page page,
	Type type,
	string key,
	string url


Type: System.Web.UI.Page
The page object that is registering the client script file.
Type: System.Type
The type of the client script file. This parameter is usually specified by using the typeof operator (C#) or the GetType operator (Visual Basic) to retrieve the type of the control that is registering the script.
Type: System.String
A unique identifier for the script file.
Type: System.String
The URL of the script file.


The client script file type is null.

- or -

The page that is registering the script file is null.


url is null.

- or -

url is empty.

When you register a script file with this method, the script is rendered every time that an asynchronous postback occurs. To register a script file for a control that is inside an UpdatePanel control so that script is registered only when the UpdatePanel control is updated, use the RegisterClientScriptInclude(Control, Type, String, String) overload of this method.

If you want to register a script block that does not pertain to partial-page updates, and if you want to register the script block only one time during initial page rendering, use the RegisterClientScriptBlock method of the ClientScriptManager class. You can get a reference to the ClientScriptManager object from the ClientScript property of the page.

.NET Framework

Supported in: 4, 3.5

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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