command failing in login code in C# on ASP.NET - asp.net

Question

I am making a website using ASP.NET framework.
My code for login page is as below, it is very simple since I'm trying to see step by step where it is going wrong. The C# code is:
protected void userLogin(object sender, EventArgs e)
{
string encoded_pass = encrypt_pass(Password.Text);
SqlConnection connection = new SqlConnection(ConfigurationManager.ConnectionStrings["Khulna_website"].ConnectionString);
connection.Open();
using (SqlCommand cmd = new SqlCommand ("Select * from users where user_email= #email and user_password = #password"))
{
cmd.Parameters.AddWithValue("#email", Email.Text);
cmd.Parameters.AddWithValue("#password", encoded_pass);
try
{
cmd.ExecuteNonQuery();
//SqlDataAdapter da = new SqlDataAdapter(cmd);
//DataTable dt = new DataTable();
//da.Fill(dt);
////Session["User"] = dt.Rows[0]["user_email"];
//Session["User_name"] = dt.Rows[0]["user_f_name"];
//loginlabel.Text = "Welcome, " + Session["User_name"];
}
catch
{
loginlabel.Text = "login error";
}
}
connection.Close();
}
Now every time I enter an email and password it always gives "login errorr".. Why the command is not executed?

Answer 1

Looks like you have declared the connection but haven't assigned it to the SqlCommand
using (SqlCommand cmd = new SqlCommand ("Select * from users where user_email= #email and user_password = #password",connection))
{
cmd.Parameters.AddWithValue("#email", Email.Text);
cmd.Parameters.AddWithValue("#password", encoded_pass);
Note i added the connection variable in the cmd declaration.
In future you may also like catching your errors in development:
catch (Exception ex)
{
loginlabel.Text = "login error: "+ ex.Message;
}
This will help you know what is going wrong.