workflow-foundation-4

问题 I am modifying an existing Windows Workflow Foundation project that was previous coded to run everything synchronously. However, as the data set grew this needed to change to meet performance requirements. What I have: Inside the workflow I have a parent Sequence Workflow that contains a few elementary workflows that basically set a few services up and prepares them to run. I then have the bulk of the workflow's work , which consists of a ForEach Workflow that operates on a collection of

问题 I have written a custom activity which contains a simple ExpressionTextBox: <sapv:ExpressionTextBox HintText="List of Strings" Grid.Row ="0" Grid.Column="1" MaxWidth="150" MinWidth="150" Margin="5" OwnerActivity="{Binding Path=ModelItem}" Expression="{Binding Path=ModelItem.Test, Mode=TwoWay, Converter={StaticResource ArgumentToExpressionConverter}, ConverterParameter=In }" /> In the library, i've added Test property as follows: public InArgument<string> Test { get; set; } So, this is the

问题 I am using WF4 and am having my types, activities and workflows in the same project and then I am using ActivityXamlServices.Load(path) to load my workflow activity and it throws the following exception: The type ‘InArgument(local:,,,, of property ‘InputArgs’ could not be resolved By looking at the solution to this problem at this post, I included assembly name manually in the workflow, and it all works. Problem: Everytime I make any change in the workflow, it re-writes the xaml and removes

问题 Let's say I have a workflow, and I want to execute it many times in parallel: System.Threading.Tasks.Parallel.For( 0, 100, i => WorkflowInvoker.Invoke( new Workflow1(), new Dictionary<string, object> { { "Num", i } })); I wonder, is it legal to execute it this way: var w = new Workflow1(); System.Threading.Tasks.Parallel.For( 0, 100, i => WorkflowInvoker.Invoke( w, new Dictionary<string, object> { { "Num", i } })); 回答1: Yes it is "legal" to execute a workflow definition that way. The workflow

问题 I am using Windows Workflow Foundation with custom Activities , and I would like to create custom Design for these activities in my workflow. I am able to make the design project, and the designer xaml. Also I am able to see the custom design for them in the workflow, if I directly refer the Design project in my Workflow project . This is something that I would not like to do, because the Designer DLL should not be deployed to production environment. I would only like to have the custom

问题 Suppose I've a custom class (any class), with its methods and properties: public class Test { public string MyString { get; set; } public bool MyBool { get; set; } public override string ToString() { return "Test Class : " + this.MyString + " - " + MyBool; } } Now I want to move and handle its properties between WF4 activities using VisualBasicValue<T> . For example: public class Program { static void Main(string[] args) { Test testClass = new Test() { MyString = "some string", MyBool = true

问题 I'm using PersistenceIOParticipant to write the workflow status to a custom db table. I need the workflow ID - any ideas how I can access it from within BeginOnSave? 回答1: As far as I know the only way is to retreive it in a activity from the execution context and pass that to your service. 来源： https://stackoverflow.com/questions/11051774/how-can-i-access-the-workflow-id-in-beginonsave-persistenceioparticipant

问题 I am facing this error, "Cannot create unknown Type '{clr- namespace:ActivityLibrary1;assembly=ActivityLibrary1}MyActivity1'" while trying to load a worklfow from Xaml file. I am trying to load Xaml from a class library project. ActivityLibrary1 is library that contains custom activity. I tried to resolve assembly at runtime by handling the currentDomain.AssemblyResolve += new ResolveEventHandler(MyResolveEventHandler) event. The assembly which it is unable to find is System.Xaml.Resources.

问题 In windows workflow foundation sequence workflow, How to use invoke method tags to be invoked based on certain condition? For example, <Sequence> <Sequence.Variables> <Variable x:TypeArguments="x:String" Default="["this is an out param"]" Name="outParam" /> <Variable x:TypeArguments="x:Int32" Name="resultValue" /> <Variable x:TypeArguments="msi:TestClass" Default="[New TestClass()]" Name="varTestClass" /> </Sequence.Variables> <sap:WorkflowViewStateService.ViewState> <scg:Dictionary x

问题 I have built a workflow designer that allows to enter a list of email addresses.Each email in the list needs to be an InArgument(Of String) so they can be individually edited/added using variables. On my Activity, I have a property that is declared like so: Public Property [To] As ObservableCollection(Of InArgument(Of String)) My designer is wired up and populating this collection properly. However during the execution, I do not know how to get the run-time value for each InArgument that was