How to make an asp Validator validate through jQuery/javascript

Question

I've got an asp:RequiredFieldValidator, which checks an asp:TextBox to see if it is blank or not.

On a button press, I would like to make the validator validate the textbox. This must be done through jQuery/javascript, as the button is an html input button.

Any ideas? I've read many resources on the web, but have not managed to accomplish this (i.e. the calling of validation through jquery)

My answer does what you're looking for. I've provided a full example of how to implement it. — James Johnson
– James Johnson, Commented Nov 4, 2011 at 17:08

James Johnson · Accepted Answer · 2011-11-04 17:53:21Z

2

You can trigger validation from JavaScript like this:

var isValid = Page_ClientValidate("");

If you only want to validate controls in a certain group just pass the group name into the function:

var isValid = Page_ClientValidate("GroupName");

Here's a quick example:

<script type="text/javascript">
    validateStuff = function(){
       return Page_ClientValidate("ValidateTextBox");
    }
</script>  
<asp:TextBox ID="TextBox1" runat="server" />
<asp:RequiredFieldValidator ID="RequiredFieldValidator1" runat="server" 
    ControlToValidate="TextBox1" 
    ValidationGroup="ValidateTextBox" 
    Display="Dynamic" 
    ErrorMessage="*" ...>
</asp:RequiredFieldValidator>
<input type="button" value="Click Me" onclick="return validateStuff();" />

edited Nov 4, 2011 at 17:53

answered Nov 4, 2011 at 16:12

James Johnson

46.1k8 gold badges75 silver badges111 bronze badges

Sign up to request clarification or add additional context in comments.

5 Comments

drdwilcox Over a year ago

I didn't down vote you, but possibly because this side-steps the framework. Just set the ValidationGroup in the Button and create a CustomValidator it will work.

s_hewitt Over a year ago

The original question says there is no ASP Button. So there wouldn't be a ValidationGroup property to assign.

James Johnson Over a year ago

The same principle still applies. Just use onclick to call the function instead. This approach doesn't side-step the framework at all. It just manually triggers the validation.

s_hewitt Over a year ago

Yea, I was just pointing out why @drdwilcox solution was not complete.

viper Over a year ago

Thanks man. Had to look everywhere only to find this perfect solution sitting over here. cheers!

Manse · Accepted Answer · 2011-11-04 15:42:13Z

0

if its jQuery validation your after - there are few better / easier to implement than this one -> http://bassistance.de/jquery-plugins/jquery-plugin-validation/

answered Nov 4, 2011 at 15:42

Manse

38.1k11 gold badges88 silver badges112 bronze badges

3 Comments

Dot NET Over a year ago

I'd rather not use a plugin. There's no way to do what I'm after?

drdwilcox Over a year ago

My answer tells you how. It's really not that hard.

James Johnson Over a year ago

It may not seem difficult to you, but others are just learning the ropes. I think OP IS just trying to survey the different options.

drdwilcox · Accepted Answer · 2011-11-04 15:44:08Z

0

All you need is a CustomValidator. Add OnServerValidate for server-side, and ClientValidationFunction to your javascript. Here is a reasonably good intro to CustomValiditors but no jQuery reference: https://web.archive.org/web/20211020145934/https://www.4guysfromrolla.com/articles/073102-1.aspx

answered Nov 4, 2011 at 15:44

drdwilcox

3,96121 silver badges19 bronze badges

2 Comments

Dot NET Over a year ago

I'll try implementing this! Many thanks for the assistance :)

James Johnson Over a year ago

The CustomValidator is actually not the right solution here. OP simply needs a RequiredFieldValidator to validate on button click. Using a CustomValidator would be overkill for such a simple task.

Collectives™ on Stack Overflow

How to make an asp Validator validate through jQuery/javascript

3 Answers 3

5 Comments

3 Comments

2 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

5 Comments

3 Comments

2 Comments

Your Answer

Sign up or log in

Post as a guest

Related