ServerClick event in .NET on button click

Question

I am trying to fire ServerClick event in .NET on button click. it works fine if I don't add onclick="return ValidateForm();"

<button runat="server" id="btn1" type="submit" onclick="return ValidateForm();">SAVE</button>

I have already declared a javascript function in head as below:

<script>
    function ValidateForm(){
        //some validation code, return true/false
        return true;
    }
</script>

Below button also works fine:

<button runat="server" id="btn1" type="submit" onclick="return true;">SAVE</button>

but if I add onclick="return somefunction" its not working.

What I am doing wrong ?

Thanks

Sorry, system picked that wrong title from cookies and I did not noticed it. I have changed the title. — Kartik Goyal
– Kartik Goyal, Commented Aug 2, 2014 at 11:41
set type as well in script tag <script type="text/javascript"> — Ehsan Sajjad
– Ehsan Sajjad, Commented Aug 2, 2014 at 12:57

Michael B. · Accepted Answer · 2014-08-03 00:45:30Z

1

change your markup to:

<button runat="server" id="btn1" type="submit" onclick="if( !ValidateForm() ) return false;" onserverclick="btn1_click">SAVE</button>

<script>
function ValidateForm() {
    //some validation code, return true/false
    return true;
}
</script>

don't forget that semi-colon at end of onlick attribute; If you inspect the result HTML code you will know why !

Assuming you have the click handler in code behind C# :

protected void btn1_click(object sender, EventArgs e)
{
}

or VB:

Protected Sub btn1_click(sender As Object, e As System.EventArgs)
End Sub

answered Aug 3, 2014 at 0:45

Michael B.

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