Solved

Why doesn't custom validator work?

Posted on 2010-08-12
9
257 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
VIDEO: THE CONCERTO CLOUD FOR HEALTHCARE

Modern healthcare requires a modern cloud. View this brief video to understand how the Concerto Cloud for Healthcare can help your organization.

 
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 500 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

PeopleSoft Has Never Been Easier

PeopleSoft Adoption Made Smooth & Simple!

On-The-Job Training Is made Intuitive & Easy With WalkMe's On-Screen Guidance Tool.  Claim Your Free WalkMe Account Now

Question has a verified solution.

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

This article is for Object-Oriented Programming (OOP) beginners. An Interface contains declarations of events, indexers, methods and/or properties. Any class which implements the Interface should provide the concrete implementation for each Inter…
International Data Corporation (IDC) prognosticates that before the current the year gets over disbursing on IT framework products to be sent in cloud environs will be $37.1B.
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…
If you’ve ever visited a web page and noticed a cool font that you really liked the look of, but couldn’t figure out which font it was so that you could use it for your own work, then this video is for you! In this Micro Tutorial, you'll learn yo…

627 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