Radio Buttons within Group box confirm on is selected before code continues

Question

I'm fairly new to C# and visual studio however have a problem.

I have 10 Radio buttons within one group box. I need to confirm one of these radio buttons is selected before continuing the code. And if one is not selected then a message box pop-up to ask user to select a radio button.

Can anyone help with this?

Answer 1

You could do this in two ways.

The first way is the back-end validation . Ie, after the form is submitted.

Eg:

if(FormModel.RadioButton != null || FormModel.RadioButton != "") 
//this can be used(For MVC in the Action Method)

The second way is, the client-side/Front-end validation(JavaScript validation) .

eg:

<script language="javascript">
   function ClientValidate() //To be called during submit button-click
   {
        if ($('#RadioButton1').checked //Where RadioButton1 is the Id of the first element
            || $('#RadioButton2').checked ) {
            arguments.IsValid = true;
        } else {
            arguments.IsValid = false;
        }
   }
</script>

hope this helps.