Page.IsStartupScriptRegistered Method (String)
Determines whether the client startup script is registered with the Page object.
Assembly: System.Web (in System.Web.dll)
[<ObsoleteAttribute("The recommended alternative is ClientScript.IsStartupScriptRegistered(string key). http://go.microsoft.com/fwlink/?linkid=14202")>] member IsStartupScriptRegistered : key:string -> bool
The string key of the startup script to search for.
Return ValueType: 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 following code example demonstrates the use of the RegisterStartupScript method in conjunction with the method. If the ECMAScript written in the code declaration block has not already been registered, as determined by , then a RegisterStartupScript call is made.
Available since 1.1