I would like to have a Javascript function to be called when ever my required field validator control is true (i.e when the validator control is fired / error message shown).
Kindly let me know how this can be done.
Thanks in advance.
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3 Answers
You can call a JS function on OnClientlick of the button.
for ex.
function CheckValidation()
{
if (Page_ClientValidate())
{
// Call Your custom JS function and return value.
}
}
// Calling JS function
<asp:Button ID="btnSubmit" runat="server"
OnClientClick="return CheckValidation();" />
Comments
Assuming you're validating a TextBox control, the following snippet should do what you want:
<asp:TextBox id=txtZip runat=server OnChange="txtZipOnChange();" />
<asp:RegularExpressionValidator id="valZip" runat="server"
ControlToValidate="txtZip" ...>
<script>
function txtZipOnChange() {
// get the validator and check if it is valid
var val = <%= valZip.ClientID %>;
if (val.isvalid == false) {
// do something
}
}
</script>
Comments
Use CustomValidator control. Set the CustomValidator.ClientValidationFunction property to the javascript function and the CustomValidator.ValidateEmptyText property to false.
