///<summary>Shows FormBilling and displays warning message if needed. Pass 0 to show all clinics. Make sure to check for unsent bills before calling this method.</summary>
private void ShowBilling(long clinicNum) {
bool hadListShowing=false;
//Check to see if there is an instance of the billing list window already open that needs to be closed.
//This can happen if multiple people are trying to send bills at the same time.
if(FormB!=null && !FormB.IsDisposed) {
hadListShowing=true;
//It does not hurt to always close this window before loading a new instance, because the unsent bills are saved in the database and the entire purpose of FormBilling is the Go To feature.
//Any statements that were showing in the old billing list window that we are about to close could potentially be stale and are now invalid and should not be sent.
//Another good reason to close the window is when using clinics. It was possible to show a different clinic billing list than the one chosen.
for(int i=0;i<FormB.ListClinics.Count;i++) {
if(FormB.ListClinics[i].ClinicNum!=clinicNum) {//For most users clinic nums will always be 0.
//The old billing list was showing a different clinic. No need to show the warning message in this scenario.
hadListShowing=false;
}
}
FormB.Close();
}
FormB=new FormBilling();
FormB.GoToChanged += new PatientSelectedEventHandler(formBilling_GoToChanged);
FormB.ClinicNum=clinicNum;
FormB.Show();//FormBilling has a Go To option and is shown as a non-modal window so the user can view the patient account and the billing list at the same time.
FormB.BringToFront();
if(hadListShowing) {
MsgBox.Show(this,"These unsent bills must either be sent or deleted before a new list can be created.");
}
}
