How to check C# Boolean Property is Null or not in X++ code ?

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Posted on by Pratik Rami

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Hello,

I have one Boolean property in C# class (Model). and I want to check if it is NULL or not in X++ code. How can I do this ?

I tried in x++ like : classObject.property != NULL but it gives exception.

How to check for for in X++ for C# boolean type.

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Sergei Minozhenko 23,097 on at

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Hi Pratik Rami,

Could you, please, share exception details?

Do you know if the boolean property in the C# class is nullable (bool?) or not (bool)? It could be not nullable and therefore you need to compare it with false.

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Martin Dráb 239,645 Most Valuable Professional on at

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It's a pity that you didn't mention what exception you got.

But if the type is boolean, comparing it with null indeed wrong. Simply use if (classObject.property), or compare it with true or false literals or a boolean expression.

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Pratik Rami 225 on at

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Yes. It is nullable (bool?). Right now I have changed some implementation and not able to Reproduce the exception I got. But yes it is working properly by comparing with false and also working if I write if(classObject.property) as Martin suggested below.

Thanks for the reply

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Martin Dráb 239,645 Most Valuable Professional on at

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bool and bool? are actually very different things. Therefore you weren't right when saying that it's a Boolean property.

bool is a primitive data data (System.Boolean).

bool? is a generic structure (System.Nullable<System.Boolean>).

Try something like this in X .

System.Nullable nullableBool = classObject.Property; if (nullableBool.HasValue) { boolean value = nullableBool; } // Or simpler if (classObject.Property.HasValue) { boolean value = nullableBool; }

Let us know how it went; CLR Interop often struggles with more complicated cases and you can't be sure it work until you actually try it.

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