private void addQuestionToolStripMenuItem_Click(object sender, EventArgs e)
        {
            ManageQuestion MQ = new ManageQuestion();

            MQ.MdiParent = this;
            MQ.Show();
        }
 private void BtLogin_Click(object sender, EventArgs e)
 {
     try
     {
         if (CmbLoginSelect.Text == "<--Select Login Type-->")
         {
             MessageBox.Show("Select Login Type.");
         }
         else
         {
             if (CmbLoginSelect.Text == "Admin")
             {
                 if (txtusername.Text == "" || txtpassword.Text == "")
                 {
                     MessageBox.Show("Enter Uesername or Password.");
                 }
                 else
                 {
                     SqlCommand cmd = new SqlCommand("Select * from Login where Username=@Username and Password=@Password", DtConnection.Con);
                     DtConnection.Con.Open();
                     cmd.Parameters.AddWithValue("@Username", txtusername.Text.ToString().Trim());
                     cmd.Parameters.AddWithValue("@Password", txtpassword.Text.ToString().Trim());
                     SqlDataAdapter adp = new SqlDataAdapter(cmd);
                     DataTable      dt  = new DataTable();
                     adp.Fill(dt);
                     int q = Convert.ToInt32(cmd.ExecuteScalar());
                     if (q > 0)
                     {
                         DtConnection.Type = "Admin";
                         MDIParent Main = new MDIParent();
                         this.Hide();
                         Main.Show();
                     }
                     else
                     {
                         MessageBox.Show("Invalid Username or Password!");
                     }
                 }
             }
             else if (CmbLoginSelect.Text == "Faculty")
             {
                 if (txtusername.Text == "" || txtpassword.Text == "")
                 {
                     MessageBox.Show("Enter Uesername or Password.");
                 }
                 else
                 {
                     SqlCommand cmd = new SqlCommand("Select * from Faculty_Master where EmailId=@EmailId and Password=@Password", DtConnection.Con);
                     DtConnection.Con.Open();
                     cmd.Parameters.AddWithValue("@EmailId", txtusername.Text.ToString().Trim());
                     cmd.Parameters.AddWithValue("@Password", txtpassword.Text.ToString().Trim());
                     SqlDataAdapter adp = new SqlDataAdapter(cmd);
                     DataTable      dt  = new DataTable();
                     adp.Fill(dt);
                     int q = Convert.ToInt32(cmd.ExecuteScalar());
                     if (q > 0)
                     {
                         DtConnection.Type  = "Faculty";
                         DtConnection.FId   = dt.Rows[0]["FId"].ToString();
                         DtConnection.SubId = dt.Rows[0]["SubId"].ToString();
                         //MDIParent Main = new MDIParent();
                         this.Hide();
                         //Main.Show();
                         ManageQuestion MQ = new ManageQuestion();
                         MQ.Show();
                     }
                     else
                     {
                         MessageBox.Show("Invalid Username or Password!");
                     }
                 }
             }
         }
         DtConnection.Con.Close();
     }
     catch (Exception)
     {
         throw;
     }
 }