IsStartupScriptRegistered Method
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Page.IsStartupScriptRegistered Method (String)

Note: This API is now obsolete.

Determines whether the client startup script is registered with the Page object.

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

[ObsoleteAttribute("The recommended alternative is ClientScript.IsStartupScriptRegistered(string key).")]
public bool IsStartupScriptRegistered(
	string key


Type: System.String

The string 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 Page.RegisterStartupScript to avoid unnecessarily assembling the client-side script. This is particularly important if the script requires a large amount of server resources to create.

The IsStartupScriptRegistered method has been deprecated. Use the IsStartupScriptRegistered method in the ClientScriptManager class.

The following code example demonstrates the use of the RegisterStartupScript method in conjunction with the IsStartupScriptRegistered method. If the ECMAScript written in the code declaration block has not already been registered, as determined by IsStartupScriptRegistered, then a RegisterStartupScript call is made.

.NET Framework
Available since 1.1
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