Does model contain an object?

Question

I have a shared view that is used by 4 different parent views. In the shared view, I need to do a simple check:

if (Model.foo == barr)
   {...]

The problem is, in one of the 4 models, there is no foo. I'd rather not add it to the one model to just avoid the error:

does not contain a definition for 'foo'

I'm wondering if I can do a pre-check, something like..

if (Model.Contains(foo) && Model.foo == bar)
{...}

Is anything like that possible?

How about [this](http://stackoverflow.com/questions/15341028/check-if-a-property-exist-in-a-class)? — Hakan SONMEZ, Jan 12 '17 at 20:08
If they share something in common you should use an contract to establish a relation between them. — Fals, Jan 12 '17 at 20:09

score 1 · Accepted Answer · answered Jan 12 '17 at 20:06

1

You could use reflection, if you want to check if an object contains a property:

if ((typeof(Model)).GetProperty("foo") && Model.foo == bar)

but it seems a bit awkward the whole thing. Basically, I have never seen reflection to be used in a View.

answered Jan 12 '17 at 20:06

Christos

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yeah, it does seem awkward. Thank you for this answer. I'll mull it over. I may need to rethink how I'm using this shared view. – Casey Crookston Jan 12 '17 at 20:07
2

You are welcome ! I think that you should reconsider the purpose of this shared view. – Christos Jan 12 '17 at 20:08

score 0 · Answer 2 · answered Jan 12 '17 at 20:32

I found a work-around that seems to be pretty good. In each of the four models, i added a property:

public int MySharedViewSource { get; set; }

And then in the view...

if (Model.MySharedViewSource == 1}
  { 
      // Wnatever is in here only gets executed if the source is 1,
      // so I can reference Model.foo and not worry about errors 
      // when using this shared view from a model that does not have foo in it.
  }

Does model contain an object?

2 Answers2