public Lookup_Child(string text, Lookup_Parent lookupParent, Lookup_ParentNullable?lookupParentNullable, bool isStoring = true)
{
Key = StorageExtensions.NoKey;
Text = text;
LookupParent = lookupParent;
LookupParentNullable = lookupParentNullable;
#if DEBUG
DC.Trace?.Invoke($"new Lookup_Child: {ToTraceString()}");
#endif
onConstruct();
if (DC.Data?.IsTransaction ?? false)
{
DC.Data.AddTransaction(new TransactionItem(5, TransactionActivityEnum.New, Key, this));
}
if (isStoring)
{
Store();
}
}
/// <summary>
/// Called before any property of Lookup_Child is updated and before the HasChanged event gets raised
/// </summary>
partial void onUpdating(string text, Lookup_Parent lookupParent, Lookup_ParentNullable?lookupParentNullable, ref bool isCancelled)
{
}
public void Update(string text, Lookup_Parent lookupParent, Lookup_ParentNullable?lookupParentNullable)
{
if (Key >= 0)
{
if (lookupParent.Key < 0)
{
throw new Exception($"Lookup_Child.Update(): It is illegal to add stored Lookup_Child '{this}'" + Environment.NewLine +
$"to LookupParent '{lookupParent}', which is not stored.");
}
if (lookupParentNullable?.Key < 0)
{
throw new Exception($"Lookup_Child.Update(): It is illegal to add stored Lookup_Child '{this}'" + Environment.NewLine +
$"to LookupParentNullable '{lookupParentNullable}', which is not stored.");
}
}
var clone = new Lookup_Child(this);
var isCancelled = false;
onUpdating(text, lookupParent, lookupParentNullable, ref isCancelled);
if (isCancelled)
{
return;
}
#if DEBUG
DC.Trace?.Invoke($"Updating Lookup_Child: {ToTraceString()}");
#endif
var isChangeDetected = false;
if (Text != text)
{
Text = text;
isChangeDetected = true;
}
if (LookupParent != lookupParent)
{
LookupParent = lookupParent;
isChangeDetected = true;
}
if (LookupParentNullable is null)
{
if (lookupParentNullable is null)
{
//nothing to do
}
else
{
LookupParentNullable = lookupParentNullable;
isChangeDetected = true;
}
}
else
{
if (lookupParentNullable is null)
{
LookupParentNullable = null;
isChangeDetected = true;
}
else
{
if (LookupParentNullable != lookupParentNullable)
{
LookupParentNullable = lookupParentNullable;
isChangeDetected = true;
}
}
}
if (isChangeDetected)
{
onUpdated(clone);
if (Key >= 0)
{
DC.Data.Lookup_Children.ItemHasChanged(clone, this);
}
else if (DC.Data.IsTransaction)
{
DC.Data.AddTransaction(new TransactionItem(5, TransactionActivityEnum.Update, Key, this, oldItem: clone));
}
HasChanged?.Invoke(clone, this);
}
#if DEBUG
DC.Trace?.Invoke($"Updated Lookup_Child: {ToTraceString()}");
#endif
}
