Unable to assign a dictionary entry to a dictionary

[pere]

Hi,

I want to create a dictionary (lets call it “dictionary1”) of type <String, Dictionary2>, with “Dictionary2” being also a dictionary, of type <Int32, HashSet>, with “HashSet” being a set of strings.

I successfully created all three variables and initialized each with the proper type.

I am able to fill the HashSet using the Invoke Method with the MethodName “Add”.

I am able to assign it to an entry of my Dictionary2 by simply doing an assignment using the Assign activity, as expected, this way:

dictionary2(1234) = myHashSet

Nevertheless, when I try to assign it to my dictionary1 the same way, that is,

dictionary1("whateverkey") = dictionary2

Studio complains with an error of the type “Cannot assign from type ‘System.Object’ to type ‘System.Collections.Generic.Dictionary2[System.Int32,System.Collections.Generic.HashSet1[System.String]]’ in Assign activity ‘Assign’.” (btw, what a hassle to have to type this by hand because there’s no way to copy&paste the actual error from Studio)

I’ve tried to change the variable type of dictionary1 from Dictionary<String,Dictionary<Int32,HashSet>> to merely Dictionary<String,Object> (thinking of casting the dictionary element when later I want to use it or whatever), but it complains with exactly the same error.

To provide some proof of concept I’m attaching some screenshots.

The dictionary variables are properly initialized:

And this is where I’m doing the assignment:

No problem assigning the hashset to the dictionary:

[efelantti]

Can you try to remove the error triggering variables from the “Variables” pane and readd them as proper types (not as Object)?

[pere]

Hi, @efelantti ,

I don’t get what you mean. In the Variables pane they are already being set with the proper type, as you can see in the 2nd screenshot.

[pere]

This is so stupid on the Studio side.

By chance, by copying the activity, then pasting it by mistake in Notepad++, I realized it’s not of the proper type I defined:

<?xml version="1.0" encoding="utf-16"?><ClipboardData Version="1.0" xmlns="http://schemas.microsoft.com/netfx/2009/xaml/activities/presentation" xmlns:p="http://schemas.microsoft.com/netfx/2009/xaml/activities" xmlns:sap2010="http://schemas.microsoft.com/netfx/2010/xaml/activities/presentation" xmlns:scg="clr-namespace:System.Collections.Generic;assembly=System.Private.CoreLib" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"><ClipboardData.Data><scg:List x:TypeArguments="x:Object" Capacity="1"><p:Assign x:Name="__ReferenceID0" VirtualizedContainerService.HintSize="434,83"><p:Assign.To><p:OutArgument x:TypeArguments="scg:Dictionary(x:Int32, scg:HashSet(x:String))">[diccionariDnisAnysMesos(dniActual)]</p:OutArgument></p:Assign.To><p:Assign.Value><p:InArgument x:TypeArguments="x:Object">[diccionariAnysMesos]</p:InArgument></p:Assign.Value></p:Assign></scg:List></ClipboardData.Data><ClipboardData.Metadata><scg:List x:TypeArguments="x:Object" Capacity="4"><scg:List x:TypeArguments="x:Object" Capacity="1"><x:Reference>__ReferenceID0</x:Reference></scg:List></scg:List></ClipboardData.Metadata></ClipboardData>

See the

<p:OutArgument x:TypeArguments=“scg:Dictionary(x:Int32, scg:HashSet(x:String))”>[diccionariDnisAnysMesos(dniActual)]</p:OutArgument></p:Assign.To><p:Assign.Value><p:InArgument x:TypeArguments=“x:Object”>[diccionariAnysMesos]</p:InArgument>

part?

This is, for sure, another of the stupid Studio bugs.

While writting this, I recreated the Assign activity and now it works.

Omg.

This software is far from being ready for production.

[J0ska]

Sometimes this happens in Studio unfortunately Especially in Assign activity.
Just cleaning both sides of Assign and re-entering usually helps. But you are right that it’s a bit frustrating.

Good luck!