If you add an activity that implements IActivityTemplateFactory ( ForEach Activity for instance ) the editor throws an NullReferenceException at CreateExpressionEditor
( if you clear the declaredVariables list, you wont get the NullReferenceException any more, but then intellisense will not work )

I think the error happens in UpdateInstance in the RoslynExpressionEditorInstance
This ugly hack, seemed to solve the issue for me

` variableDeclarations = string.Join("", variables.Select(v => {
var c = v.GetCurrentValue() as System.Activities.Variable;
if (c != null) return c.Type.FullName + " " + c.Name + ";\n";
var d = v.GetCurrentValue() as System.Activities.DelegateArgument;
if (d != null) return d.Type.FullName + " " + d.Name + ";\n";
return null;
//return d.Type.FullName + " " + d.Name + ";\n";
}).ToArray());

`

Currently hovering on menu or clicking on activities gives a golden/yellow colour which i intent to change to sky blue. Is there a way out to do so ?

When I run the app, and try to Open a .xaml file with text below, I get this error:

System.Xaml.XamlException: 'The type ‘InArgument(local:TestWorkflowRequest)’ of property ‘request’ could not be resolved.' Line number '14' and line position '32'.

File:

<x:Members>
<x:Property Name="request" Type="InArgument(local:TestWorkflowRequest)" />
</x:Members>
local:TestWorkflow.request

<mca:CSharpValue x:TypeArguments="local:TestWorkflowRequest">null</mca:CSharpValue>

</local:TestWorkflow.request>
sap2010:ExpressionActivityEditor.ExpressionActivityEditorC#</sap2010:ExpressionActivityEditor.ExpressionActivityEditor>
sap2010:WorkflowViewState.IdRefMiddleOfficeWorkflowActivities.Activity1_1</sap2010:WorkflowViewState.IdRef>
<TextExpression.NamespacesForImplementation>
<sco:Collection x:TypeArguments="x:String">
<x:String>System</x:String>
<x:String>System.Collections.Generic</x:String>
<x:String>System.Data</x:String>
<x:String>System.Linq</x:String>
<x:String>System.Text</x:String>
<x:String>MiddleOfficeWorkflowActivities</x:String>
</sco:Collection>
</TextExpression.NamespacesForImplementation>
<TextExpression.ReferencesForImplementation>
<sco:Collection x:TypeArguments="AssemblyReference">
Microsoft.CSharp
Pvtb.Framework.Configuration
Pvtb.Framework.Data
System
System.Activities
System.ComponentModel.DataAnnotations
System.Core
System.Data
System.Runtime.Serialization
System.ServiceModel
System.ServiceModel.Activities
System.Xaml
System.Xml
System.Xml.Linq
DataAccess
WorkflowService
mscorlib
MiddleOfficeWorkflowActivities
</sco:Collection>
</TextExpression.ReferencesForImplementation>

<StateMachine.InitialState>

<State.Transitions>

<Transition.Trigger>
<local:TestWorkflowBookmark BookmarkName="Started" DisplayName="Started" sap2010:WorkflowViewState.IdRef="TestWorkflowBookmark_1" />
</Transition.Trigger>
<Transition.To>

<State.Transitions>

<Transition.Trigger>
<local:TestWorkflowBookmark x:Name="__ReferenceID4" BookmarkName="In Review" DisplayName="InReview" sap2010:WorkflowViewState.IdRef="TestWorkflowBookmark_2">
local:TestWorkflowBookmark.Result

<mca:CSharpReference x:TypeArguments="local:TestWorkflowRequest">request</mca:CSharpReference>

</local:TestWorkflowBookmark.Result>
</local:TestWorkflowBookmark>
</Transition.Trigger>
<Transition.Condition>
<mca:CSharpValue x:TypeArguments="x:Boolean">request.RequestedAction == "Approve"</mca:CSharpValue>
</Transition.Condition>
<Transition.To>

</Transition.To>


<Transition.Condition>
<mca:CSharpValue x:TypeArguments="x:Boolean">request.RequestedAction == "Reject"</mca:CSharpValue>
</Transition.Condition>
<Transition.To>

<State.Transitions>

<Transition.Trigger>
<local:TestWorkflowBookmark BookmarkName="Waiting for Information" DisplayName="WaitingForInformation" sap2010:WorkflowViewState.IdRef="TestWorkflowBookmark_4" />
</Transition.Trigger>
<Transition.To>
<x:Reference>__ReferenceID0</x:Reference>
</Transition.To>

</State.Transitions>

</Transition.To>

</State.Transitions>

</Transition.To>

</State.Transitions>

</StateMachine.InitialState>
<x:Reference>__ReferenceID1</x:Reference>
<x:Reference>__ReferenceID0</x:Reference>
<x:Reference>__ReferenceID2</x:Reference>
<x:Reference>__ReferenceID3</x:Reference>
sads:DebugSymbol.Symbold3REOlxDSEktVEZTXE1pZGRsZU9mZmljZVxEZXZlbG9wbWVudFxBZGRfSW5pdGlhbFJlbGVhc2VcTWlkZGxlT2ZmaWNlXE1pZGRsZU9mZmljZVdvcmtmbG93QWN0aXZpdGllc1xUZXN0V29ya2Zsb3cueGFtbBISBxJaAQI3A3wSAgEBOQd1DwIBFkAPcRcCAQhiF20fAgEEUBdQiAECAQI9Dz2TAQIBGEQXSjQCARJNF016AgEQVRdcNAIBDF8XX3kCAQpmH2bBAQIBBj04PUECARlEQERLAgEVRx1HewIBE1VAVUsCAQ9YHVh7AgENZkhmYQIBBw==</sads:DebugSymbol.Symbol>

sap2010:WorkflowViewState.ViewStateManager
sap2010:ViewStateManager
<sap2010:ViewStateData Id="TestWorkflowBookmark_1" sap:VirtualizedContainerService.HintSize="200,22" />
<sap2010:ViewStateData Id="TestWorkflowBookmark_2" sap:VirtualizedContainerService.HintSize="200,22" />
<sap2010:ViewStateData Id="State_4" sap:VirtualizedContainerService.HintSize="114,61">
sap:WorkflowViewStateService.ViewState
<scg:Dictionary x:TypeArguments="x:String, x:Object">
<av:Point x:Key="ShapeLocation">403,299.5</av:Point>
<av:Size x:Key="ShapeSize">114,61</av:Size>
<x:Boolean x:Key="IsPinned">False</x:Boolean>
</scg:Dictionary>
</sap:WorkflowViewStateService.ViewState>
</sap2010:ViewStateData>
<sap2010:ViewStateData Id="Transition_1" sap:VirtualizedContainerService.HintSize="430,507">
sap:WorkflowViewStateService.ViewState
<scg:Dictionary x:TypeArguments="x:String, x:Object">
<av:PointCollection x:Key="ConnectorLocation">357,270 454.3,270 454.3,299.5</av:PointCollection>
<x:Int32 x:Key="SrcConnectionPointIndex">36</x:Int32>
<x:Int32 x:Key="DestConnectionPointIndex">34</x:Int32>
</scg:Dictionary>
</sap:WorkflowViewStateService.ViewState>
</sap2010:ViewStateData>
<sap2010:ViewStateData Id="TestWorkflowBookmark_5" sap:VirtualizedContainerService.HintSize="200,22" />
<sap2010:ViewStateData Id="TestWorkflowBookmark_4" sap:VirtualizedContainerService.HintSize="200,22" />
<sap2010:ViewStateData Id="Transition_2" sap:VirtualizedContainerService.HintSize="430,507">
sap:WorkflowViewStateService.ViewState
<scg:Dictionary x:TypeArguments="x:String, x:Object">
<av:PointCollection x:Key="ConnectorLocation">73,340 43,340 43,270 243,270</av:PointCollection>
<x:Int32 x:Key="SrcConnectionPointIndex">37</x:Int32>
<x:Int32 x:Key="DestConnectionPointIndex">37</x:Int32>
</scg:Dictionary>
</sap:WorkflowViewStateService.ViewState>
</sap2010:ViewStateData>
<sap2010:ViewStateData Id="State_3" sap:VirtualizedContainerService.HintSize="114,61">
sap:WorkflowViewStateService.ViewState
<scg:Dictionary x:TypeArguments="x:String, x:Object">
<av:Point x:Key="ShapeLocation">73,309.5</av:Point>
<av:Size x:Key="ShapeSize">114,61</av:Size>
<x:Boolean x:Key="IsPinned">False</x:Boolean>
</scg:Dictionary>
</sap:WorkflowViewStateService.ViewState>
</sap2010:ViewStateData>
<sap2010:ViewStateData Id="Transition_3" sap:VirtualizedContainerService.HintSize="430,507">
sap:WorkflowViewStateService.ViewState
<scg:Dictionary x:TypeArguments="x:String, x:Object">
<av:PointCollection x:Key="ConnectorLocation">300,300.5 300,336.95 187,336.95</av:PointCollection>
<x:Int32 x:Key="SrcConnectionPointIndex">39</x:Int32>
<x:Int32 x:Key="DestConnectionPointIndex">32</x:Int32>
</scg:Dictionary>
</sap:WorkflowViewStateService.ViewState>
</sap2010:ViewStateData>
<sap2010:ViewStateData Id="State_2" sap:VirtualizedContainerService.HintSize="114,61">
sap:WorkflowViewStateService.ViewState
<scg:Dictionary x:TypeArguments="x:String, x:Object">
<av:Point x:Key="ShapeLocation">243,239.5</av:Point>
<av:Size x:Key="ShapeSize">114,61</av:Size>
<x:Boolean x:Key="IsPinned">False</x:Boolean>
</scg:Dictionary>
</sap:WorkflowViewStateService.ViewState>
</sap2010:ViewStateData>
<sap2010:ViewStateData Id="Transition_4" sap:VirtualizedContainerService.HintSize="430,507">
sap:WorkflowViewStateService.ViewState
<scg:Dictionary x:TypeArguments="x:String, x:Object">
<av:PointCollection x:Key="ConnectorLocation">300,168.5 300,239.5</av:PointCollection>
<x:Int32 x:Key="SrcConnectionPointIndex">39</x:Int32>
<x:Int32 x:Key="DestConnectionPointIndex">38</x:Int32>
</scg:Dictionary>
</sap:WorkflowViewStateService.ViewState>
</sap2010:ViewStateData>
<sap2010:ViewStateData Id="State_1" sap:VirtualizedContainerService.HintSize="114,69">
sap:WorkflowViewStateService.ViewState
<scg:Dictionary x:TypeArguments="x:String, x:Object">
<av:Point x:Key="ShapeLocation">243,99.5</av:Point>
<av:Size x:Key="ShapeSize">114,69</av:Size>
<x:Boolean x:Key="IsPinned">False</x:Boolean>
<x:Double x:Key="StateContainerWidth">100</x:Double>
<x:Double x:Key="StateContainerHeight">33.040000000000077</x:Double>
</scg:Dictionary>
</sap:WorkflowViewStateService.ViewState>
</sap2010:ViewStateData>
<sap2010:ViewStateData Id="StateMachine_1" sap:VirtualizedContainerService.HintSize="614,636">
sap:WorkflowViewStateService.ViewState
<scg:Dictionary x:TypeArguments="x:String, x:Object">
<x:Boolean x:Key="IsExpanded">False</x:Boolean>
<av:Point x:Key="ShapeLocation">270,2.5</av:Point>
<x:Double x:Key="StateContainerWidth">600</x:Double>
<x:Double x:Key="StateContainerHeight">600</x:Double>
<av:PointCollection x:Key="ConnectorLocation">300,77.5 300,99.5</av:PointCollection>
</scg:Dictionary>
</sap:WorkflowViewStateService.ViewState>
</sap2010:ViewStateData>
<sap2010:ViewStateData Id="MiddleOfficeWorkflowActivities.Activity1_1" sap:VirtualizedContainerService.HintSize="654,716" />
</sap2010:ViewStateManager>
</sap2010:WorkflowViewState.ViewStateManager>

The VB expression editor with intellisense does not seem to work.
As shown in image https://ibb.co/6rb8cjH, I create a new Custom (VB Intellisense ExpressionEditor) workflow and add Argument of type String. I add an Assign activity for a = a.SubString(0, 2), but no completions are displayed for a.SubString.

I want to also help bundle this into an MSI package

Do I need to use a different template for XAML

Hi there, great lib 💯 however I cannot get it to run, its complaining the dlls cannot be loaded because of system.activities.- could not load system.activities or one of its dependencies

1. I tried to resolve this using nuget but it failed any help would be appreciated, can you please update to include the system.activities dll
2. Also I would be interested in helping out with documentation, as it would help me/others out too. Can you help guide us on what are the steps to follow/create and persist a new activity - for e.g. with a workitems queue, like a document approval system.

thanks
Papi

Is it possible to open more than 1 flow at a time? Like a tabbed feature. May need context perhaps?

The Expression service editor is implemented. However fails to work. Thanks

How to add debug functionality like step,step in,step over.