Gridview radio button Delete

protected void Button1_Click(object sender, EventArgs e)
    {
        //string empid;
        foreach(GridViewRow r in GridView1.Rows)
        {
            RadioButton rb = new RadioButton();
//empid = rb.tostring();
            rb = (RadioButton)r.FindControl("Radio1");
            if (rb.Checked)
            {
                cmd = new SqlCommand("empdel", con);
                cmd.CommandType = CommandType.StoredProcedure;
                cmd.Parameters.Add("@CustomerID", SqlDbType.Int);
              //  cmd.Parameters["@CustomerID"].Value = empid;
                con.Open();
                cmd.ExecuteNonQuery();
                con.Close();
                GridView1.EditIndex = -1;
                BindGrid();
            }
        }
    }

can any one modify and send