how to call a js function from code behind? .. which is acceding form control id's within it.

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im working on a web app. and i need to call a such type of js function which is using form controls's id . actually i am am familiar to call js function from code behind but those js functions which are accessing form control ids, not able to access. showing error.

error is like this : 'cannot find the button'.

so what i shouls do ? code behind calling process is below-
ScriptManager.RegisterClientScriptBlock(this, this.GetType(), "Script", "javascript:open_redirect();", true);

and function is this: -

<script type = "text/javascript">
function open_redirect() {

document.getElementById('<%= click_call_button.ClientID%>').click();
}

</script>

Posted 25-Dec-15 21:16pm

Ashutosh shukla207

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OriginalGriff · Accepted Answer · 2015-12-25T21:41:00

Um.
You do realize that the <%= click_call_button.ClientID%> part of that accesses the server variable, pass that to a JS get id and then click the control it finds?

And you want to call that from the server...which isn't going to work.

Why?
I'd just replicate the JS operations on the server side instead of just trying to complicate matters by running a server function (as a result of client activity) which calls a client function to access a server variable and then execute a client operation which almost certainly activates a server function...all of which is while the first operation is trying to build some HTML to send back from the first server call...and so is the second...

I'd sit down, and rethink what I'm doing here, it's getting unnecessarily overcomplicated (and won't work properly anyway).