Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

Why doesn't custom validator work?

Posted on 2010-08-12
9
Medium Priority
?
258 Views
Last Modified: 2013-11-08
In asp.net 3.5, I'm using a custom validator.  I set a breakpoint in the code behind.  It is never hit and I never see an error display.  How can I figure what is wrong with the implementation?
<asp:CustomValidator ID="myVal" ControlToValidate="txtTextBox" 
                    runat="server" Display="Dynamic" EnableClientScript="false" 
                    ErrorMessage="An error has occurred" 
                    OnServerValidate="IsThisValid/>

//In code behind
protected void IsThisValid(object sender, ServerValidateEventArgs args)
        {
            args.IsValid = MyValidator.IsThisValid(args.Value);
        }

Open in new window

0
Comment
Question by:brettr
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 4
9 Comments
 
LVL 41

Expert Comment

by:guru_sami
ID: 33424640
just wondering if that's a typo or missing " after "IsThisValid?

OnServerValidate="IsThisValid"/>
0
 

Author Comment

by:brettr
ID: 33424667
Typo.  The quote is there in the real code.
0
 
LVL 18

Expert Comment

by:Anil Golamari
ID: 33424679
<asp:TextBox runat="server" id="txtCustom" />
<asp:CustomValidator runat="server" id="cusCustom" controltovalidate="txtCustom" onservervalidate="IsThisValid"
errormessage="The text must have a value!" />


//Code Behind.
protected void IsThisValid(object sender, ServerValidateEventArgs e)
{
    if(e.Value.Length == "")
        e.IsValid = true;
    else
        e.IsValid = false;
}

Can you try this code and see what it returns.

Good Luck.
0
Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 41

Expert Comment

by:guru_sami
ID: 33424700
Then you might want to make sure if no other client-side validation is failing.....and the isn't any postback at all.
0
 

Author Comment

by:brettr
ID: 33424750
@lucky85:

I tried your example.  Still nothing.
0
 
LVL 41

Accepted Solution

by:
guru_sami earned 2000 total points
ID: 33424827
Did you set ValidationGroup for your submit button?
If so then you need to include that for your CustomValidator as well.
0
 

Author Comment

by:brettr
ID: 33424834
Apparently I needed to add a ValidationGroup attribute for this to work.  I'm using a value that matches that used by other validators.  Not sure why ValidationGroup causes it to work now.
0
 

Author Closing Comment

by:brettr
ID: 33424892
I posted just after you sami.  Thanks.
0
 
LVL 41

Expert Comment

by:guru_sami
ID: 33424900
If you Button has ValidationGroup="abc" then when you click that button the Validators that has ValidationGroup="abc" are only validated.
So if you don't include it with your CustomValidator, it won't fire.
0

Featured Post

Efficient way to get backups off site to Azure

This user guide provides instructions on how to deploy and configure both a StoneFly Scale Out NAS Enterprise Cloud Drive virtual machine and Veeam Cloud Connect in the Microsoft Azure Cloud.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

IntroductionWhile developing web applications, a single page might contain many regions and each region might contain many number of controls with the capability to perform  postback. Many times you might need to perform some action on an ASP.NET po…
This article aims to explain the working of CircularLogArchiver. This tool was designed to solve the buildup of log file in cases where systems do not support circular logging or where circular logging is not enabled
In this brief tutorial Pawel from AdRem Software explains how you can quickly find out which services are running on your network, or what are the IP addresses of servers responsible for each service. Software used is freeware NetCrunch Tools (https…
Have you created a query with information for a calendar? ... and then, abra-cadabra, the calendar is done?! I am going to show you how to make that happen. Visualize your data!  ... really see it To use the code to create a calendar from a q…

722 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question