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ClientScriptManager.GetPostBackEventReference Method (Control, String, Boolean)

Returns a string to use in a client event to cause postback to the server. The reference string is defined by the specified control that handles the postback and a string argument of additional event information. Optionally, registers the event reference for validation.

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

public string GetPostBackEventReference(
	Control control,
	string argument,
	bool registerForEventValidation


Type: System.Web.UI.Control

The server Control that processes the postback on the server.

Type: System.String

A string of optional arguments to pass to control.

Type: System.Boolean

true to register the event reference for validation; otherwise, false.

Return Value

Type: System.String
A string that, when treated as script on the client, initiates the postback.


The specified Control is null.

To implement the IPostBackEventHandler interface for a Page, use the @ Implements directive.

The GetPostBackEventReference method can be used with the Button control when the UseSubmitBehavior property is false. In this scenario, the GetPostBackEventReference method returns the client postback event for the Button control.

If registerForEventValidation is true, the GetPostBackEventReference(PostBackOptions, Boolean) method calls the RegisterForEventValidation(String, String) method to register the event reference for validation with a unique control ID that represents the client control that is generating the event.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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