C#•2mo ago

Casting types inline

I'm still not clear on all the routes to this, and which one is best for readability. I'm trying to get .Count from a child object of object sender. The Type hierarchy is:

DirectDragTreeViewItem.GistViewModel.GistModel.IList<GistFileModel>

DirectDragTreeViewItem.GistViewModel.GistModel.IList<GistFileModel>

Here are a couple of ways I've tried:

int directCastListCount = (GistViewModel)((DirectDragTreeViewItem)sender).DataContext) // wtf!? gave up here
int paternMatchedListCount = ((((sender as DirectDragTreeViewItem).DataContext as GistViewModel).Gist as GistModel).Files as IList<GistFileModel>).Count();

int directCastListCount = (GistViewModel)((DirectDragTreeViewItem)sender).DataContext) // wtf!? gave up here
int paternMatchedListCount = ((((sender as DirectDragTreeViewItem).DataContext as GistViewModel).Gist as GistModel).Files as IList<GistFileModel>).Count();

Of course things could be nested deeper. Which is the best way (realise 'best' is ambiguous)

7 Replies

Joreyk ( IXLLEGACYIXL )•2mo ago

send proper event args

Stefanidze•2mo ago

What are you trying to achieve here? What's the purpose of this code? If you want to pass data with event you don't need the sender object but EventArgs Also casting here looks strange to me...

stigzler•2mo ago

I was really asking more conceptually

Joreyk ( IXLLEGACYIXL )•2mo ago

in C# you have always ( atleast in Gui its standard ) for an event of some kind SomeEvent(object sender, ImportantEventArgs args) you define the ImportantEventArgs yourself, and there you put your types accurately how you need them into that you shouldnt cast the sender

Stefanidze•2mo ago

Well, if you want this code working, this looks fine to me:

IList<GistFileModel> result = (sender as DirectDragTreeViewItem).GistViewModel.GistModel.IList<GistFileModel>;

IList<GistFileModel> result = (sender as DirectDragTreeViewItem).GistViewModel.GistModel.IList<GistFileModel>;

But you really shouldn't do this to pass data with events...

stigzler•2mo ago

Yeah - I'm jjst tinkering with someone else's code + i hear what you are saying about design, but my question was really about syntax/concepts

Joreyk ( IXLLEGACYIXL )•2mo ago

the concept is to not do what has be done

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Casting types inline