asp.net ajax using UpdatePanel to update the prompts

Ajax|asp.net want to realize such a simple function, but toss for half a day. The reason is the first use of ASP.net Ajax, is not intended to use the MS. But wanted to see how his frame was.

There is an error using Response.Write (JS). Looking for some documents, the original use of ScriptManager static method RegisterStartupScript to implement the call. It is not known why the instance type does not provide this method. It cost me a lot of time.

Scriptmanager.registerstartupscript (this. UpdatePanel1, this. GetType (), "Updatescript", "alert (' Save Success ')", true);

It seems to be a good time to study it later.