protected void btn_update_Click( object sender, EventArgs e ) { //defaultstatus(); string did = this.txtbox_did.Text; string name = this.txtbox_name.Text; string gender = this.txtbox_gender.Text; string tempage = this.txtbox_age.Text; if ( did.Length > 0 && name.Length > 0 && gender.Length > 0 && tempage.ToString().Length > 0 ) { Data.DataBase.doctorsDataTable table = new Data.DataBase.doctorsDataTable(); BusinessTier.Admin admin = new BusinessTier.Admin(); table = admin.SearchDoctorByID(did); if ( table.Rows.Count > 0 ) { int age = int.Parse(tempage); admin.UpdateDoctorByID(name, gender, age, did); } else { this.lbl_idwarning.Text = "This ID is not exsit"; this.lbl_idwarning.BackColor = System.Drawing.Color.Red; } } else { errorWarning(); } }