I am not able to get a successful login using this code... can somebody help me out

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C#

.NET

I have now checked whether read.Reader is returning the values.And Yes it it.!!
Its been displayed on the console but still when I run the code i get unsuccessful login box

private void button1_Click(object sender, EventArgs e)
   {
       String s1 = textBox1.Text;
       String s2 = textBox2.Text;

       SqlConnection cnn = new SqlConnection("Data Source=.\\SQLEXPRESS;Initial Catalog=register;Integrated Security=True");
           String sql = ("select Userid,Password from reg where Userid='" + s1 + "' and Password='" + s2 + "' ");
           cnn.Open();

           String userid="";
           String password="";

     SqlCommand cmd = new SqlCommand(sql,cnn);
          SqlDataReader reader  = cmd.ExecuteReader();



          if (reader.HasRows)
          {
              while(reader.Read())
              {
                  userid = reader.GetString(0);
                  password = reader.GetString(1);

                  Console.WriteLine(userid);
                  Console.WriteLine(password);
              }

       if((s1.Equals(userid)) && (s2.Equals(password)))
              {

                   MessageBox.Show("LOGIN SUCCESSFULLY DONE>>");
              }

              else
              {
                   MessageBox.Show("LOGIN UNSUCCESSFUL ....");
              }
          }

//
This is my reg table::

Userid Password Re-entered Mob.No
John 444 444 7895858201
Matt 101 101 9858964750
Bill bill bill 8579698940

Here is a screenshot of what i did