private void MBtnExportUser_Click(object sender, EventArgs e) { if (!rqExportData.IsValid) { rqExportData.ControlToValidate.Focus(); return; } try { Path = mTxtExportPath.Text; ExportUser?.Invoke(this, null); mTxtExportPath.Text = ""; } catch (Exception ex) { MessageBox.Show("Có lỗi khi xuất dữ liệu: " + ex.Message); } }