Can't use MyVariable in Function(x)→(Function(x) x*MyVariable)

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#1

Hi, I want to use my variable in function(x) , like MyVarible = 2

Enumerable.Range(1, 10).ToArray().Reverse.Select(Function(x) x*k)
it will throw an error:
For Each: An ActivityContext can only be accessed within the scope of the function it was passed into.
Object name: ‘System.Activities.CodeActivityContext’.

If I use 2 not k, Workflow can work fine.

Does anyone know this problem? thanks.
image

Enumerable.xaml (5.5 KB)

#2

Hi,

Can you try the following expression?

Enumerable.Range(1, 10).ToArray().Reverse.Select(Function(x) Convert.ToInt32(x*k)).toArray

Regards,

1 Like
#3

@Yoichi
Thanks you! It works!
I think the reason is .toArray

#4

Hi,

Yes. Select method is deferred execution. It’s unable to set in the property as it is.
So, we need to add ToArray or ToList method which have it immediate execution.

Regards,

1 Like
#5

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