You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5.
You write the following code fragment.
<asp:RadioButton ID=”RadioButton1″ runat=”server” oncheckedchanged=”RadioButton_CheckedChanged”/>
<asp:RadioButton ID=”RadioButton2″ runat=”server” oncheckedchanged=”RadioButton_CheckedChanged”/>
<asp:RadioButton ID=”RadioButton3″ runat=”server” oncheckedchanged=”RadioButton_CheckedChanged”/>
You need to ensure that the following requirements are met:
* Users can select only one RadioButton control at a time.
* The Web page is not reloaded when a RadioButton control is selected.
What you should do?
A.
Add the following attribute for each of the RadioButton controls. GroupName=”group1″
B.
Add the following attribute for each of the RadioButton controls. ValidationGroup=”group1″
C.
Add the following code fragment to the RadioButton_CheckedChanged method. (sender as RadioButton).Checked = true;
D.
Add the following code fragment to the RadioButton_CheckedChanged method.
RadioButton1.Checked = (RadioButton1 == sender);RadioButton2.Checked = (RadioButton2 == sender);RadioButton3.Checked = (RadioButton3 == sender);