Radio button to select one box only....ERROR - asp.net

Question

Something is wrong with the following code cause I can select more than one radiobutton at the same time.... How can I make the following code select only one radiobutton? Please help.
<asp:ListView ID="ListView1" runat="server" DataSourceID="SqlDataSource_BGlist">
<ItemTemplate>
<asp:RadioButton ID="Radio1" GroupName="BG_name" runat="server" Text='<%# Eval("BG_fileName") %>' />
<asp:Label ID="BG_fileNameLabel" runat="server" Text='<%# Eval("BG_fileName") %>' />
</ItemTemplate>
</asp:ListView>

Answer 1

The easiest way to accomplish this is to just wrap your listview in an ASP.NET Panel or GroupBox, and ASP will implement the grouping you want.
Adding a panel doesn't group radio buttons together if they are contained in some sort of repeater. Probably the best solution is to use a RadioButtonList as suggested in Grebets' Answer.
If that doesn't suit your needs you can use javascript to alter the radio buttons after they have been created. The following code will work when added to the bottom of your page:
<script type="text/javascript">
var inputElements = document.getElementsByTagName("input");
for (var inputName in inputElements) {
var input = inputElements[inputName];
if (input.type === "radio") {
input.name = "Group1";
}
}
</script>
The script can be simplified if you are using jQuery.

Answer 2

I think the most effective way will be use RadioButtonList:
<asp:RadioButtonList ID="RadioButtonList1" runat="server" DataTextField="BG_fileName" DataValueField="BG_fileName" DataSourceID="SqlDataSource_BGlist">
</asp:RadioButtonList>
And if you preffer to use datasources in codebehind (like I do):
public class MyClass
{
public string BG_fileName { get; set; }
public MyClass(string bgFileName)
{
BG_fileName = bgFileName;
}
}
public partial class _Default : Page
{
protected void Page_Load(object sender, EventArgs e)
{
RadioButtonList1.DataSource = new List<MyClass>
{
new MyClass("test string 1"),
new MyClass("test string 2"),
new MyClass("test string 3")
};
RadioButtonList1.DataBind();
}
}