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call javascript from .net code

Posted on 2011-02-28
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Last Modified: 2012-05-11
Is it possible to call .net code from javascript? I want my button click event to launch javascript code contained in my <head> tag.

I there is another way I could better handle this I am open to suggestions
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Question by:vbnetcoder
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4 Comments
 
LVL 23

Expert Comment

by:Rajkumar Gs
ID: 34999369
<script>
function Test()
{
alert('Calling this function in Codebehind')
}
</script>

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In order to call Test() in page_load event of codebehind file ,I mean Cs /vb file
Button1.Attributes.Add("onclick", " return Test();");

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This will call Javascript from serverside when the corresponding event is fired.
Javascript in codebehind

To Use confirm message directly from codebehind
btnSubmit.Attributes.Add("onclick", "if(!confirm('Are you sure?')) return false;") 

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LVL 23

Accepted Solution

by:
Rajkumar Gs earned 500 total points
ID: 34999373
-- javascript function

  function alertMe() {

            alert('Hello');

        }

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-- code-behind c# code
if (!ClientScript.IsStartupScriptRegistered("alert"))

{

    Page.ClientScript.RegisterStartupScript

        (this.GetType(), "alert", "alertMe();", true);

}

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-- code-behind vb code
If (Not ClientScript.IsStartupScriptRegistered("alert")) Then

    Page.ClientScript.RegisterStartupScript _

    (Me.GetType(), "alert", "alertMe();", True)

End If

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Author Closing Comment

by:vbnetcoder
ID: 35000840
ty
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LVL 23

Expert Comment

by:Rajkumar Gs
ID: 35003856
Glad to help you
Raj
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