CheckBox event can not find javascript function

Question

I have a few controls designed to verify certain data before a user may do a soft delete on server data.

The error:

Compiler Error Message: CS1061: 'ASP.editdivision_aspx' does not contain a definition for 'show_confirm' and no extension method 'show_confirm' accepting a first argument of type 'ASP.editdivision_aspx' could be found (are you missing a using directive or an assembly reference?)

Line 28:         <td><asp:TextBox runat="server" ID="txtDivisionName"  Width="250"  /></td>
Line 29:     </tr>
Line 30:     <tr><td><asp:CheckBox ID="chkDelete" runat="server" Text="Delete" OnCheckedChanged="show_confirm" /></td></tr>
Line 31:     <tr><td><asp:Button ID="btnSave" runat="server" Text="Save" OnClick="SaveClick" /></td></tr>
Line 32: </table>

The script:

<script type="text/jscript" >
function show_confirm() {
    PageMethods.VerifyDelete(CallSuccess, CallFailed);
}
function CallSuccess(res, destCtrl) {}
function CallFailed(res, destCtrl) {
    var r = confirm("There are active Campaigns in this Division!\nAre you sure you want to proceed?");
    if (r == true) {
        PageMethods.Save();
        //alert("Division and related Campaigns deleted.");
    }
}
</script>

I have been unable to determine why I am getting this runtime error. I am new to asp and javascript so I am sure it is something simple I missed, but I have been searching for 2 days on what the problem is.

Didier Ghys · Accepted Answer · 2011-11-16 16:41:31Z

3

The attribute OnCheckedChanged requires a server-side event handler, not a javascript function.

Try the onchange attribute which is the standard html attribute for the client-side event:

<asp:CheckBox ID="chkDelete" runat="server" Text="Delete" onchange="show_confirm()" />

Edit:

It seems asp.net is generating a element and applies the 'onchange' on the span and not the .

Found this post that deals with this problem: Add client-side onchange handler to ASP.NET CheckBox control

edited Nov 16, 2011 at 16:41

answered Nov 16, 2011 at 16:29

Didier Ghys

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6 Comments

scott.smart Over a year ago

I was trying that yesterday with some co-workers help. That assigns those to the span tag.

Didier Ghys Over a year ago

You mean that the 'onchange' attribute is set on the <span> that asp.net generates along with the checkbox ?

scott.smart Over a year ago

Yes. Sorry, I just got a new job and this is the first time I'm running page design.

Didier Ghys Over a year ago

Don't be sorry. ASP.net generates too much unnecessary html in my opinion and it's not easily controllable. Found this post about this problem. Have a look.

scott.smart Over a year ago

That did not help :( While the attribute showed up in the input and not span, the method still did not get called.

|

Enkode · Accepted Answer · 2016-04-22 06:31:17Z

0

This is what worked for me, onchange and OnClientClick did not work, onclick did:

    <asp:CheckBox ID="EnabledCheckBox" runat="server" OnClick="showDiv(this.checked);"/>
<div id="ShowDiv">Show me now</div>

Javascript:

function showDiv(show) {
  if (show) {
    $('#ShowDiv').show("slow");
  } else {
    $('#ShowDiv').hide("slow");
  }
}

answered Apr 22, 2016 at 6:31

Enkode

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