Disable and enable Mdiparent Toolstrip Menu Items

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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 23-Nov-12 19:49pm

jayaprakashthathagari

Updated 23-Nov-12 20:39pm

André Kraak

v2

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Ali91Asadi · Answer 1 · 2012-11-23T21:13:00

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();
               }