Calling JavaScript function from code beind (c#) catch block

Question

Hi,

I am trying to call a JavaScript function from my ascx control code behind in the catch block. I have tried the below two ways but they don't seem to work.

1. Page.ClientScript.RegisterClientScriptBlock(typeof(string), "script", "test();", true);

2. ScriptManager.RegisterStartupScript(Page, GetType(), "err_msg", "alert('error');", true);

The function is called if I place the code Under "PageLoad" but doesn't get called when placed in catch block.Should I do any different to call a JavaScript function from catch block. Please suggest.

Thanks

Answer 1

What is the catch block for and where is it?

If code in a catch block is executed it usually means that something failed, maybe that failure also is the reason the JS call does not go through.

Answer 2

Have you tried this?

Page.ClientScript.RegisterStartupScript(typeof(string), "script", "test();", true);

I cant recall off the top of my head if that is equivalent to the ScriptManager option in the question.

Also you need to make sure that the "script key" value you are passing in is unique otherwise asp.net will discard all but the first instance of the registered script with the same key.