Form.Hide() and Form.Visable = false; Don't Work

ziycon

This function is in a class file, can't get the frmLogin form to hide when a user logins in, the frmMain will open fine though!???

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 public void login(string username,string password)

       {

           DBConnect(); //Internal DB connection call
 
           frmLogin login = new frmLogin();
 
           md5 = new MD5CryptoServiceProvider();

           originalBytes = ASCIIEncoding.Default.GetBytes(password);

           encodedBytes = md5.ComputeHash(originalBytes);
 
           QueryString = "SELECT username,password FROM userdat WHERE username='" + username + "'";

           command.CommandText = QueryString;

           try

           {

               Reader = command.ExecuteReader();

               Reader.Read();

               try

               {

                   if (Reader.GetValue(0).ToString() != null)

                   {

                       if ((username == Reader.GetValue(0).ToString()) && (BitConverter.ToString(encodedBytes) == Reader.GetValue(1).ToString()))

                       {

                           login.Hide();

                           new frmMain().Show();

                       }

                       else

                       {

                           MessageBox.Show("Username or password are incorrect.", "Simplicity", MessageBoxButtons.OK, MessageBoxIcon.Warning);

                       }

                   }

               }

               catch(MySqlException)

               {

                   MessageBox.Show("Username is incorrect.", "Simplicity", MessageBoxButtons.OK, MessageBoxIcon.Warning);

               }
 
           }

           catch (MySqlException ex01)

           {

               MessageBox.Show("Error communicating with the database.\nInternal Error Code: x00001\nError Code: "+ex01, "Simplicity", MessageBoxButtons.OK, MessageBoxIcon.Error);

           }
 
           DBDisconnect(); //Internal DB close connection call.

       }

Plater

You are not hiding your existing login form, you are creating a new one and hiding THAT one.
You will need to hide the instance of the one already opened.

ziycon

I've added the function to return a boolean value to the login form so if the login details are all correct it'll return a true value so on the login form i have the below if statement and it seems to be working ok, thanks for that Plater.

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 validate = dbconn.login(txtUsername.Text, txtPassword.Text);

if (validate)

   this.Hide();

Form.Hide() and Form.Visable = false; Don't Work

re: Form.Hide() and Form.Visable = false; Don't Work

re: Form.Hide() and Form.Visable = false; Don't Work

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