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Here is a code for my web form control
<asp:TextBox runat="server" ID="txtUsername"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" ControlToValidate="txtUsername" runat="server" ErrorMessage="RequiredFieldValidator"></asp:RequiredFieldValidator>
<asp:CustomValidator OnServerValidate="checkUsername" ID="CustomValidator1" runat="server" ControlToValidate="txtUsername" EnableClientScript="true" ClientValidationFunction="checkUsername" ErrorMessage="CustomValidator"></asp:CustomValidator>
Client side validation
<script type="text/javascript">
function checkUsername(source,args){
alert("test");
/* alert(args.Value);
args.IsValid=false;
*/
}
</script>
Server side validation
protected void checkUsername(object sender, System.Web.UI.WebControls.ServerValidateEventArgs e) {
String str=e.Value;
if(str.Length>6)
e.IsValid = false;
}
But for some reason this Costom Validation is not firing . Any clues ?
EDIT: I am coding in asp for first time , Server validation is in code-behind class
Here is a code asp.net page , Maybe some small mistake I am making ?
<%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Registration.aspx.cs" Inherits="lab1.Registration" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:Button ID="Button1" runat="server" Text="Recreate table"
onclick="Button1_Click" />
<asp:GridView ID="GridView1" runat="server">
</asp:GridView>
</div>
<script type="text/javascript">
function checkUsername(source,args){
args.IsValid=(args.Value.length<=6);
/* alert(source.Value);
args.IsValid=false;
alert(document.getElementById("txtUsername").nodeValue);*/
}
</script>
<asp:Table ID="Table1" runat="server" Height="106px" Width="469px">
<asp:TableRow>
<asp:TableCell>
<asp:Label runat="server" Text="Username"></asp:Label>
</asp:TableCell>
<asp:TableCell>
<asp:TextBox runat="server" ID="txtUsername"></asp:TextBox>
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" ControlToValidate="txtUsername" runat="server" ErrorMessage="RequiredFieldValidator"></asp:RequiredFieldValidator>
<asp:CustomValidator OnServerValidate="checkUsername" ID="CustomValidator1" runat="server" ControlToValidate="txtUsername" EnableClientScript="true" ClientValidationFunction="checkUsername" ErrorMessage="CustomValidator"></asp:CustomValidator>
</asp:TableCell>
</asp:TableRow>
</asp:Table>
</form>
</body>
</html>
810
Ok, try changing your two methods like this.
<script type="text/javascript">
function checkUsername(source,args){
args.IsValid=(args.Value.length<=6);
}
</script>
and
protected void checkUsername(object sender, System.Web.UI.WebControls.ServerValidateEventArgs e)
{
e.IsValid = (e.Value.Length <= 6);
}
The only real difference is it works out the true and the false IsValid, rather than only setting it to false.
If this isn't the problem then please elaborate a bit more on exactly what isn't working.
EDIT: Just to add to this... If it's just a length of input that you're interested then why not use a RegularExpressionValidator?
115
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