Why ClientValidationFunction function is not working properly?

Question

<script type="text/javascript">
    function clientValidation(sender, arguments)
    {
        if (arguments.value == "hello world")
            arguments.isvalid = true;
        else
            arguments.isvalid = false;

        alert(arguments.isvalid);
    }
</script>

<asp:Label ID="lblName" runat="server" Text="Enter Your Name" />
<asp:TextBox ID="txtbxName" runat="server" />
<asp:CustomValidator ID="CustomValidator1" runat="server" ErrorMessage="You are Not allowed" Display="None" ClientValidationFunction="clientValidation" ValidationGroup="ValidationSummary1" />
<br />
<asp:Label ID="lblClass" runat="server" Text="Class" />
<asp:TextBox ID="txtClass" runat="server" />
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" ErrorMessage="Please enter Clas" ControlToValidate="txtClass" Display="None" ValidationGroup="ValidationSummary1" />
<br />            
<asp:ValidationSummary ValidationGroup="ValidationSummary1" ID="ValidationSummary1" runat="server" />
<br />
<asp:Button ID="Button1" runat="server" Text="Validate" ValidationGroup="ValidationSummary1" />

@ El Ronnoco : In the above code there is always value false in alert box why so? — Learner
– Learner, Commented Jan 29, 2011 at 14:59
try arguments.Value instead of arguments.value. Javascript is case-sensitive. — El Ronnoco
– El Ronnoco, Commented Jan 29, 2011 at 15:23

KV Prajapati · Accepted Answer · 2011-01-29 15:16:09Z

4

Try this,

function clientValidation(sender, arguments)
{
  if (arguments.Value == "hello world")
     arguments.IsValid = true;
  else
     arguments.IsValid = false;
}

EDIT: Set ControlToValidate property.

<asp:CustomValidator ID="CustomValidator1" runat="server" 
         ErrorMessage="You are Not allowed" 
         ClientValidationFunction="clientValidation" 
         ValidationGroup="ValidationSummary1" 
         ControlToValidate="txtbxName">
</asp:CustomValidator>

edited Jan 29, 2011 at 15:16

answered Jan 29, 2011 at 15:03

KV Prajapati

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3 Comments

Learner Over a year ago

Thanks for answer; Tried the code but still there is error. Thanks in advance

Learner Over a year ago

It works but why does this not work if i dont use controltovalidate?

brenjt Over a year ago

@jagdeep, because the CustomValidator needs something to validate. ControlToValidate does just what it says, it validates a control that you specify.

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