selected input type radio button asp.net

Question

<input type="radio" name="group1" />1
<input type="radio" name="group1" />2

How do i know witch one is selected when the form is posted ?

Answer 1

The inputs should have values:

<input type="radio" name="group1" value="1" />1
<input type="radio" name="group1" value="2" />2

Then, the value will be posted on the name group1. On Asp.net you can get it using:

Request.Form["group1"]

Answer 2

If you are using runat="server", it can happen that name attribute is changed at client, so you will get null as value.