void CheckUser() { try { ep1.Clear(); if (string.IsNullOrEmpty(txtUserPassword.Text.Trim())) { ep1.SetError(txtUserPassword, "Password is required.."); txtUserPassword.Focus(); return; } DateTime myDateTime = DateTime.Now; DateTime checkDate1 = DateTime.Parse("2018-05-05"); DateTime checkDate2 = DateTime.Parse("2018-08-25"); //if ((myDateTime >= checkDate1 && myDateTime <= checkDate2) == false) //{ // Datalayer.InformationMessageBox("Demo is expried."); // return; //} MyDa = new MyDabaseDataContext(Properties.Settings.Default.Style_King_Dev); var list = (from TL01_USER in MyDa.GetTable <TL01_USER>() where TL01_USER.TL01_PASSWORD == txtUserPassword.Text.Trim() select TL01_USER).ToList(); if (list.Count > 0 && list != null) { //if (DateTime.Now.Month >= 3) //{ // Datalayer.InformationMessageBox("Your Demo is Expire. Please contact to admin."); // this.Close(); //} //if (DateTime.Now.Month <= 2) //{ // Datalayer.InformationMessageBox("Your Demo is Expire. Please contact to admin."); // this.Close(); //} Datalayer.iTL01_USERID = list[0].TL01_USERID; Datalayer.UserType = list[0].TL01_ROLE.ToString(); frmCompanySelection fmMain = new frmCompanySelection(); fmMain.Show(); this.Hide(); // } } else { Datalayer.InformationMessageBox("User name or Password is wrong. please try agin.."); txtUserPassword.Text = ""; txtUserPassword.Focus(); } } catch (Exception ex) { Datalayer.WorningMessageBox(ex.Message.ToString(), "Error"); } }