when i try to check if a radio button is checked, the code doesnt execute - asp.net

Question

i am trying 2 make a quiz in asp.net.
the mcq choices r displayed using radio buttons. in code behind, when i try 2 check if radiobutton is checked, d code under that if statement does not execute.
aspx code:
<ItemTemplate>
<asp:Literal ID="Literal1" runat="server" Text='<%#Eval("ques") %>'></asp:Literal><br />
<asp:RadioButton GroupName="a" ID="RadioButton1" Text='<%#Eval("ch1") %>' runat="server" /><br />
<asp:RadioButton GroupName="a" ID="RadioButton2" Text='<%#Eval("ch2") %>' runat="server" /><br />
<asp:RadioButton GroupName="a" ID="RadioButton3" Text='<%#Eval("ch3") %>' runat="server" /><br />
<asp:RadioButton GroupName="a" ID="RadioButton4" Text='<%#Eval("ch4") %>' runat="server" /><br />
<asp:Label ID="Label1" runat="server" Text='<%#Eval("ans") %>' Visible="false"></asp:Label><br />
<asp:Label ID="Label3" runat="server" Text="Label"></asp:Label><br />
</ItemTemplate>
code behind:
protected void Button1_Click(object sender, EventArgs e)
{
int count = 0;
foreach(RepeaterItem Items in Repeater1.Items)
{
RadioButton r1 = (RadioButton)Items.FindControl("RadioButton1");
RadioButton r2 = (RadioButton)Items.FindControl("RadioButton2");
RadioButton r3 = (RadioButton)Items.FindControl("RadioButton3");
RadioButton r4 = (RadioButton)Items.FindControl("RadioButton4");
Label l3 = (Label)Items.FindControl("Label3");
Label l=(Label)Items.FindControl("Label1");
l3.Text = "hello?";
if (r1.Checked)
{
if(r1.Text==l.Text)
count++;
}
else
{
if (r2.Checked)
{
if(r2.Text==l.Text)
count++;
}
}
// and so on for all 4 options
}
Label2.Visible = true;
Label2.Text = "your score is " + count; //always zero!
}

Answer 1

If you're stepping through the debugger, and your line
if(r1.Text==l.Text)
count++;
isn't executing, then I would guess that the line if (r1.Checked) is evaluating to false.
On your Page_Load() method for this page, are there any databindings or manipulation of these radio buttons? If so, unless you wrap them in a if(!Page.IsPostBack){ ... } conditional then it will wipe out whatever the user did to the radio button, hence r1.Checked would be false.
I hope that might help :) Good luck.

Answer 2

You'll need to do the following:
Set the AutoPostBack on the radio button control to true.
Set the OnItemCommand on the repeater control to "Button1_Click"
Change the signature of the Button1_Click method to protected void Button1_Click(object sender, RepeaterCommandEventArgs e)
That will at least trigger the method in your code behind.