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I'm a new in C# and creating Mdiparent form in that form toolstrip menu items are Login,Invoice,Transaction like...when I login form open it opened and other menu items are Enabled(previously disabled)..

This is login form code:
C#
private void login_Click(object sender, EventArgs e)
        {
            bool flag = false;

            try
            {
                System.Data.OleDb.OleDbConnection conn = new System.Data.OleDb.OleDbConnection();
                conn.ConnectionString = BillingApplication.Properties.Settings.Default.DB_BillingConnectionString;
                conn.Open();

                string selectString = "SELECT * FROM login WHERE (Username = '" + textBox1.Text + "' AND Password = '" + textBox2.Text + "')";
                OleDbCommand cmd = new OleDbCommand(selectString, conn);
                OleDbDataReader dr = cmd.ExecuteReader();
                if (dr.HasRows)
                {
                    while (dr.Read())
                    {
                        flag = true;

                    }
                }
            }
            catch (Exception)
            {
                MessageBox.Show("Error with Database Connection");
            }
            if (flag == true)
            {
                frmLogin login = new frmLogin();
                login.Hide();

                foreach (Form form in Application.OpenForms)
                {
                    if (form.GetType() == typeof(MDIParent1))
                    {
                        form.Activate();
                        return;
                    }
                }
                
              
            }
        }
Posted
Updated 23-Nov-12 20:39pm
v2

1 solution

Main Form Code
C#
private void frmMain_Load(object sender, EventArgs e)
   {
       this.Hide();

       DialogResult dr;
       frmLogin lStudent = new frmLogin();
       dr = lStudent.ShowDialog(this);
       lStudent.Dispose();

       if (dr != System.Windows.Forms.DialogResult.OK)
           this.Dispose();
       else
          this.Show();
   }

Login Form Code
C#
string u = "tochal",p="1357";
               if (txtUserName.Text == u && p == txtPassword.Text)
               {
                   this.DialogResult = System.Windows.Forms.DialogResult.OK;
                   this.Dispose();
               }
   
v2
Comments
Ali91Asadi 24-Nov-12 3:17am
   
ShowDialog(this)=>Locking Main Form

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