private void btnPhucHoi_Click(object sender, EventArgs e)
 {
     if (restoreDialog.ShowDialog() == DialogResult.OK)
     {
         System.Data.SqlClient.SqlCommand cmd = new System.Data.SqlClient.SqlCommand("USE master RESTORE DATABASE " + Utilities.DatabaseName + " FROM DISK = '" + restoreDialog.FileName.ToString() + "'");
         DataService data = new DataService();
         data.Load(cmd);
         MessageBoxEx.Show("Phục hồi dữ liệu thành công!", "RESTORE COMPLETED", MessageBoxButtons.OK, MessageBoxIcon.Information);
     }
     else
     {
         return;
     }
 }
 private void btnSaoLuu_Click(object sender, EventArgs e)
 {
     if (backupDialog.ShowDialog() == DialogResult.OK)
     {
         System.Data.SqlClient.SqlCommand cmd = new System.Data.SqlClient.SqlCommand("BACKUP DATABASE " + Utilities.DatabaseName + " TO DISK = '" + backupDialog.FileName.ToString() + "'");
         DataService data = new DataService();
         data.Load(cmd);
         MessageBoxEx.Show("Sao lưu dữ liệu thành công!", "BACKUP COMPLETED", MessageBoxButtons.OK, MessageBoxIcon.Information);
     }
     else
     {
         return;
     }
 }