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Validating A WebForms Checkbox . . .

. . . and other ASP.NET controls that the Validation controls can not be wired to.

The presentation today may be something you already know how to do.  But, this question comes up repeatedly in my work as a .NET coach, which means there are still people who don’t know how to do this.  There are other people who think they know how to do this but are hacking the solution.  I encourage you to watch the video.  My bet is that 80% of you that do will learn something you didn’t already know about the validation controls and how to use them properly.

Here’s the basic problem.  There are controls in the .NET framework that can not be wired to the standard validation controls.  The checkbox control is one example.  You can’t use the RequiredFieldValidator because it has a value.  It’s either true or false.  And you can’t provide a RegularExpressionValidator or one of the others because it is a boolean value.

So, if I want to make sure a check box is checked before the user continues, for example.  And, I want to make sure that the error message shows up in the error summary control like every other error, how do I do that?

 

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About Dave Bush

Dave Bush is a Full Stack ASP.NET developer focusing on ASP.NET, C#, Node.js, JavaScript, HTML, CSS, BootStrap, and Angular.JS. Does your team need additional help in any of the above? Contact Dave today.

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5 Comments on "Validating A WebForms Checkbox . . ."

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Brian
Guest

Hi Dave,
I’ve just watched your YouTube video of how to validate a checkbox – it almost worked but I’m a little confused with the code as I use C# in VWD 2008.

Can you help?

Thanks
Brian.

Dave Bush
Admin

Probably. Let’s try to do it through the comment system so that others will benefit.

Andrew
Guest

Hi Dave, May i get the example validate the checkbox its checked or not? Please

Thanks

Andrew

Viney Dhiman
Guest

WebForms UnobtrusiveValidationMode requires a
ScriptResourceMapping for ‘jquery’. Please add a ScriptResourceMapping
named jquery(case-sensitive).
this error occur what shou i do ?

wpDiscuz