} //ChkProductForAdd()
//check all product fields for validity
public bool ChkProductForUpdate(ClassStudent p)
{
int errCnt = 0;
if (String.IsNullOrEmpty(p.ClassName))
{
errCnt++; ModelNumberBrush = errorBrush;
}
else
{
ModelNumberBrush = okBrush;
}
if (String.IsNullOrEmpty(p.StudentName))
{
errCnt++; ModelNameBrush = errorBrush;
}
else
{
ModelNameBrush = okBrush;
}
if (errCnt == 0)
{
Status = "OK"; return(true);
}
else
{
Status = "Update, missing or invalid fields."; return(false);
}
} //ChkProductForUpdate()
private void UpdateProduct(ClassStudent p)
{
if (selectedProduct != null)
{
int index = dataItems.IndexOf(selectedProduct);
if (index > -1)
{
dataItems.ReplaceItem(index, p);
SelectedProduct = p;
}
else
{
Console.WriteLine("Index out of boundry " + selectedProduct.Grouping);
}
}
}
private void ClearClassStudentDisplay()
{
//App.last_action = "Clear"; Clear is always appended to other major Actions
isSelected = false;
stat.NoError();
if (DisplayedProduct != null && DisplayedProduct.ClassId == null && DisplayedProduct.StudentId == null)
{
log.Info("In ClearClassStudentDisplay: No need to create a new ClassStudent()");
}
else
{
DisplayedProduct = new ClassStudent();
log.Info("ClearClassStudentDisplay() invokes DisplayedProduct = new ClassStudent()");
}
App.Messenger.NotifyColleagues("ProductCleared");
///MainWindowViewModel.Instance.StatusBar = $"Screen Cleared";
} //ClearProductDisplay()
private void GetClassStudent()
{
App.last_action = "Refresh";
isSelected = false;
stat.NoError();
if (DisplayedProduct != null && DisplayedProduct.ClassId == null && DisplayedProduct.StudentId == null)
{
log.Info("In GetClassStudent: No need to create a new ClassStudent()");
}
else
{
DisplayedProduct = new ClassStudent();
log.Info("GetClassStudent() invokes DisplayedProduct = new ClassStudent()");
}
App.Messenger.NotifyColleagues("GetClassStudents");
MainWindowViewModel.Instance.StatusBar = $"DB Refreshed";
}
public SqlClassStudent(ClassStudent p)
{
Id = p.ID;
StudentId = p.StudentId;
ClassId = p.ClassId;
TuitionPaid = p.TuitionPaid;
Comment = p.Comment;
UpdateDateTime = p.UpdateDateTime;
InvoiceNumber = p.InvoiceNumber;
CasherName = p.CasherName;
CashReceived = p.CashReceived;
CheckReceived = p.CheckReceived;
CheckNumber = p.CheckNumber;
CreditCardReceived = p.CreditCardReceived;
OtherReceived = p.OtherReceived;
OtherSource = p.OtherSource;
RegistrationDate = p.RegistrationDate;
//TuitionDiscount = p.TuitionDiscount;
}
} //AddProduct()
public void ProcessProduct(ClassStudent p)
{
log.Info("CSDisplayViewModel..ProcessProduct starts");
//Delete will trigger SelectionChanged, So SelectionChanged is ambigous, let's disable this flag to remove abiguity
//App.last_action = "SelectionChanged";
if (p == null)
{
/*DisplayedProduct = null;*/
isSelected = false;
return;
}
//Deep copy to seperate DisplayVM..DisplayedProduct and CSViewModel..SelectedProduct; Each has its own context
//but after testing, we dont need to do a deep copy, it still works
///ClassStudent temp = new ClassStudent();
///temp.CopyProduct(p);
//DisplayedProduct = temp;
DisplayedProduct = p;
isSelected = true;
stat.NoError();
MainWindowViewModel.Instance.StatusBar = $"Record selection changed";
log.Info("CSDisplayViewModel..ProcessProduct End");
} // ProcessProduct()
private void AddProduct(ClassStudent p)
{
//No need for deep copy
DataItems.Add(p);
//RefreshCustomerView();
}