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ClientScriptManager.IsStartupScriptRegistered Method (String)

Determines whether the startup script is registered with the Page object using the specified key.

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

public bool IsStartupScriptRegistered(
	string key
)

Parameters

key
Type: System.String

The key of the startup script to search for.

Return Value

Type: System.Boolean
true if the startup script is registered; otherwise, false.

Call this method before calling the RegisterStartupScript method to avoid registering duplicate scripts. This is particularly important if the script requires a large amount of server resources to create.

A startup script is uniquely identified by its key and its type. Scripts with the same key and type are considered duplicates.

This overload of the IsStartupScriptRegistered method calls the overload that takes both a string key and a type parameter with the type set as a Page object

.NET Framework

Supported in: 4.6, 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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