Question

I have radio buttons within a datagrid which is within a repeater. There are 4 radiobuttons that are created for each “repeat” within the repeater and I want to make the selection of 1 of these 4 mandatory. I have already put these radiobuttons within the same GroupName, so only 1 of them can be selected.

They are not in a radiobuttonlist and I do not want to place it in a radiobutton list.

Answer 1

Since you have them in the same group name you can make a custom validator.

<asp:CustomValidator ID="myValidator" runat="server" ErrorMessage="you must select one" onservervalidate="myValidator_serverValidate" />

Then in the code behind,

   protected void myValidator_serverValidate(object sender, ServerValidateEventArgs e) 
    { 
      bool isSelected = false; 

      foreach (Control control in yourForm.Controls) 
      { 
         if (control == RadioButton) 
         { 
         RadioButton rb = (RadioButton)control; 
         if (rb.GroupName == "myGroup" && rb.Checked) 
         { 
           isSelected = true; 
         } 
         } 
      } 
       e.IsValid = isSelected; 
    }