C#•2y ago

❔ what the proper way to check if ``dynamic`` has a specific property?

I have this code below

dynamic modelObject = new { Count = 0 };

dynamic modelObject = new { Count = 0 };

now I'm passing this as a @model to a partial view

@model dynamic

<div class="container-fluid">
    <p>
        <!-- Check if @@Model has a property named ``Count`` -->
    </p>
</div>

@model dynamic

<div class="container-fluid">
    <p>
        <!-- Check if @@Model has a property named ``Count`` -->
    </p>
</div>

how do i properly check if modelObject has a property named Count? I searched for solutions online and most require me to turn it into a Dictionary BUT I DONT WANT TO DO THAT!! casting it to dictionary is just....redundant and doesn't feel right, anyways, is there a proper way to do it?

9 Replies

Tvde1•2y ago

The whole point about dynamic is that you lose any and all type information and safety

AlizerOP•2y ago

yeah but the data i send to this specific partial view vary a lot if i make a class/struct just for the model it would contain 50+ properties

Tvde1•2y ago

Some googling recommends

var hasCount = modelObject.GetType().GetProperty("Count") != null;

var hasCount = modelObject.GetType().GetProperty("Count") != null;

sounds like a weird page a dictionary does sound like a good use case then

AlizerOP•2y ago

oh boy Rider bugs out, it thinkgs .GetType() is a member of the dynamic object, alright ill try this out

Mayor McCheese•2y ago

Something like strategy pattern on the page might help too, depending on type of object youll render parts of razor differently

Tvde1•2y ago

.GetType() is a member of the dynamic object dynamically I suppose which probably yields another dynamic

Mayor McCheese•2y ago

Down side is probably lots of duplication on page, sounds like you're building some sort of control renderer?

AlizerOP•2y ago

alright so I went for this code which for some reason automatically checks for null, thanks btw

Accord•2y ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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❔ what the proper way to check if ``dynamic`` has a specific property?