My program does not save or load infomation in or from data base - c#-3.0

Question

I created a database and three pages for a register & login form & the third is for a lottery between my usernames .
I don't have any errors but the whole thing is not using the data base,
it does not save or load from database .
This is my register form:
using System;
using System.Collections.Generic;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
public partial class _2 : System.Web.UI.Page
{
protected void btnRegister_Click(object sender, EventArgs e)
{
string strcon = "Data Source=.;uid=sa;pwd=123;database=Login_Register";
SqlConnection con = new SqlConnection(strcon);
SqlCommand com = new SqlCommand("strlogin", con);
com.CommandType = System.Data.CommandType.StoredProcedure;
SqlParameter p1 = new SqlParameter("username", txtUserName.Text.ToString());
SqlParameter p2 = new SqlParameter("email", txtEmail.Text.ToString());
SqlParameter p3 = new SqlParameter("password", txtpassword.Text.ToString());
com.Parameters.Add(p1);
com.Parameters.Add(p2);
com.Parameters.Add(p3);
con.Open();
Label4.Text ="ثبت نام با موفقیت انجام شد".ToString();
Label4.Visible = true;
con.Close();
com.ExecuteNonQuery();
}
private SqlDbType ToString(object text)
{
throw new NotImplementedException();
}
}
public class Label4
{
internal static object Text;
internal static bool Visible;
}
public class txtUserName
{
internal static object Text;
internal static bool Visible;
}
public class txtEmail
{
internal static object Text;
internal static bool Visible;
}
public class txtpassword
{
internal static object Text;
internal static bool Visible;
}

Answer 1

Look at your code
con.Open();
Label4.Text ="ثبت نام با موفقیت انجام شد".ToString();
Label4.Visible = true;
con.Close();
com.ExecuteNonQuery();
You are opening the connection, closing it and then executing.
it should be:
con.Open();
Label4.Text ="ثبت نام با موفقیت انجام شد".ToString();
Label4.Visible = true;
com.ExecuteNonQuery();
con.Close();//close connection after execute.
also it would be a good idea to add try/catch block around it - in case connection cannot be opened