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How to pass a Nullable`1 type value to a function in AX2009

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Posted on by Rob Keeris

Hi,

I am implementing a webservice. I created the reference without problems.

In the script I run into the problem I have to pas a value to a function

void measurement.set_length(Nullable`1 type)

How can i pass a value to this Nullable`1 type?

In the generated source file I can see it is declared as a System.Nullable<decimal>

I tried :

measurement.set_length(System.Nullable`1<decimal>(110));

But the `sign is not allowed in scripts

measurement.set_length(System.Nullable<decimal>(110));

This gives a strange Table is out of range error..

Regards,

Rob

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Martin Dráb 237,904 Most Valuable Professional on at

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X++ doesn't support generics, so it's always a bit tricky to work with generic types in AX. Another problem may be that Nullable<T> is a structure, not a class.

I would try something like this:

System.Type nullableType = System.Type::GetType('System.Nullable`1[System.Decimal]'); System.Object decimalValue = System.Convert::ToDecimal(123); System.Object[] paramValues = new System.Object[1](); CLRObject nullableValue; paramValues.SetValue(decimalValue, 0); nullableValue = System.Activator::CreateInstance(nullableType, paramValues);

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Rob Keeris 50 on at

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Thanks for your replay.....

but is does not solve the compile-time error.

nullableValue is of type CLRObject and I can't pass it to the function.

But the hint to use System.Type::GetType('System.Nullable`1[System.Decimal]'); might be usefull. :-)

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Martin Dráb 237,904 Most Valuable Professional on at

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It works in AX2012, but apparently not in AX2009. Sorry.

You can't use generic types in variable declaration in X++, so you'll have to change the service to accept non-generic parameters or to create a proxy client in .NET if you can't (or don't want) to change the service.

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metin emre 502 on at

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You saved my day, thanks!!!

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metin emre 502 on at

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I just tried like this, but crashes with CLRerror at last line, no error string returned:

System.Type nullableType = System.Type::GetType('System.Nullable`1[System.Decimal]');

System.Object decimalValue;

System.Object[] paramValues = new System.Object[1]();

decimalValue = System.Convert::ToDecimal(smmParametersTable.SNBPTTinUserPers);

paramValues.SetValue(decimalValue, 0);

nullableValue = System.Activator::CreateInstance(nullableType, paramValues);

input.set_musteriId(nullableValue);

Do you have any idea?

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metin emre 502 on at

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Please ignore my last message. It was my fault. I had to change Decimal to Int32. Thanks again, it worked...

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