private void btnUpdateSource_Click(object sender, EventArgs e)
 {
     try
     {
         if (comboBoxSorceName.Text == "")
         {
             MessageBox.Show("من فضلك اختر المكتب", "خطأ", MessageBoxButtons.OK, MessageBoxIcon.Error);
         }
         else if (txtSourceName.Text == "")
         {
             MessageBox.Show("من فضلك ادخل اسم المكتب", "خطأ", MessageBoxButtons.OK, MessageBoxIcon.Error);
         }
         else
         {
             sourceControl = new SourceControl();
             string previousName = comboBoxSorceName.Text;
             string sourceName   = txtSourceName.Text;
             string address      = txtSourceAddress.Text;
             string employee1    = txtSourceEmployee1.Text;
             string employee2    = txtSourceEmployee2.Text;
             string phone1       = txtSourcePhone1.Text;
             string phone2       = txtSourcePhone2.Text;
             string phone3       = txtSourcePhone3.Text;
             sourceControl.updateSource(previousName, sourceName, address, employee1, employee2, phone1, phone2, phone3);
             MessageBox.Show("تم تعديل البيانات بنجاح", "تم", MessageBoxButtons.OK, MessageBoxIcon.Information);
             txtSourceName.Text      = "";
             txtSourceAddress.Text   = "";
             txtSourceEmployee1.Text = "";
             txtSourceEmployee2.Text = "";
             txtSourcePhone1.Text    = "";
             txtSourcePhone2.Text    = "";
             txtSourcePhone3.Text    = "";
             sourceControl.fillComboboxSourceName(comboBoxSorceName);
         }
     }
     catch (Exception ex)
     {
         MessageBox.Show(ex.Message);
     }
 }