This section focuses on how to add multiple activity to the WF4.0 process and how to customize the activity
This example downloads:
Http://files.cnblogs.com/foundation/SequenceSample.rar
Http://files.cnblogs.com/foundation/CodeActivitySample.rar
Sequential container sequence and codeactivity
Sequential container sequence
Class name
System.Activities.Statements.Sequence
File
System.Activities.dll
Structure description
Inherit nativeactivityi
WF workflow instance persistence (passivation) is very important in workflow projects. In actual business, almost all business flows can be completed after a long time, in this way, the unfinished business flow needs to be persisted to the database or file.
WF itself provides the sqlworkflowpersistenceservice service to support instance persistence.
PublicSqlworkflowpersistenceservice (string connecti
[Stick to the top] Stick to learning WF Article Indexes
This article mainly introduces the basic knowledge of the state machine workflow in WF. The state machine workflow and sequential workflow are different. Ordered workflows are generally relatively fixed and predictable, and there are many interactions with the system. State Machine workflows are generally unpredictable, and there will be more interac
[Stick to the top] Stick to learning WF Article Indexes
WF regularly checks the persistence point and saves the workflow instance to the persistent storage. In this way, information related to the workflow is stored if an error occurs or the workflow ends abnormally, the next time the workflow instance is loaded, it will start from this point. This is mainly for work-embedded services. The external ser
When I recently studied WF, I encountered an unknown error, such as the error message.
Error 102 extend "Microsoft. activities. build. validation. validationbuildextension "triggers" system. XAML. xamlobjectwriterexception "type exception:" For type "founder. framework. workflow. WF. data. when taskactivity constructor executes a call that meets the specified binding constraints, an exception is thrown. ".
1. Summary
In the above article, we used ifelse to simulate a login process.
In this article, we will use while to simulate a guessing game.
In recent articlesArticleI will have some simulated small examples to explain the usage of the specific active control, but it is just a small example. In actual engineering, we all use WF to build an overall macro framework process. This is not a small example and we hope you will be familiar with it.
WF 4.0 RC has been released, but it has not changed much compared with Beta 2: wf4.0: RC compared with beta2, it seems that the wf4.0 state machine workflow cannot be released with vs2010, you can only wait for an independent SDK or the next version. In general, RC has determined all content of wf4.0. If you want to know WF 4.0 RC, you cannot miss the following resources.
Microsoft Windows Workflow Founda
Windows Workflow Foundation is not a business workflow platform, but a group of APIS for process development. It provides good thread management, process scheduling, Object persistence, and exception handling, basic functions of transaction processing.
Whether a workflow project is successful depends on the project analysis and design, and does not depend on what new technologies are used.
UseFamiliarTechnology, doFamiliarThings
UseUnfamiliarTechnology, doFamiliarThings
UseFamiliarTechnology
Design business process platform based on WF _ participants and task list
Participants are involved in the process (it seems a bit nonsense ),
Here, I will briefly describe the participants. I will explain more in the following articles about resources.
From the workflow perspective, there are three types of persons related to the process:
Participants
It refers to the person whose subjective meaning directly affects the process path or result,
Through this section, you can understand the characteristics of WF program to provide a preliminary perceptual knowledge for future WF application development.
Two examples of this article
Http://files.cnblogs.com/foundation/LoadXamlSample.rar
Http://files.cnblogs.com/foundation/WorkflowApplicationSample.rar
The basic principle of workflowapplication and design WF
After completing this chapter, you will learn:
1. Learn how each workflow activity is designed to be used to expose your workflow to XML Web services
2. Understand what it takes to host workflows in asp.net
3. See how error (Fault) is handled in workflows based on XML Web services
4. Configure your workflow for xml-based Web services for a variety of situations
In the previous chapter, "Invoking Web Services in your workflow", you saw how to invoke an XML Web service using the Invokewebserv
General Manager interview, which is based on the process.
Event-driven workflow: Consider whether our software engineering process is like this:
3.First instance:Hello World
Learn anyProgramIn the first exampleHello WorldThis time is no exception.
Let's build a simpleWFSmall program.
My environment isVisual Studio 2008 +. NET Framework 3.5 SP1To build a project:
First, let's get familiar with the environment:
Open vs2008 and choose new --> Project:
Then select wor
In the WF environment, it is easy to cause an endless loop, because according to the forward-channing reasoning principle, a rule can trigger itself, in which case it will cause an endless loop: IF this. disCount = 10 THEN this. disCount = 10 this statement can easily cause an endless loop. In addition, when there are two or more Rules, it is easy to cause an endless loop:R1: IF this. Name! = "Headchen" THEN this. disCount = 10R2: IF this. disCount =
1. Summary
In thisArticleIn, we will mainly learn about the usage of replicator activities, and then we will pass a simulated voteProgramFamiliarize yourself with the Replicator activity.
In addition, we will try to decouple the workflow from the specific implementation method in this section.
2. Replicator
In the previous article, we learned the IF-else activity and the while activity. We learned the same idea as we learned the basic syntax of the language, we also lack an important
Objective:By now we can see that WF4 contains a designer for a. xmal file and a runtime that invokes the activity. When you create your own workflow, you are also creating an activity,Because the activity is a class that inherits System.Activities.Activity.Activities can implement business processes, and some activities implement business processes by invoking other activities, such as sayhello activities that do not write text to the console, but rather through WriteLine activities.To achieve t
Microsoft's WF is a good workflow development platform. Compared with the Open-Source Workflow implementation, its designer is not very beautiful (of course, this is also quite different from the connected designer I have seen before.) I suddenly came up with an idea last week. Can I implement a similar workflow designer on the web page ?! We all know that it is difficult to draw a line on a web page using JS (in fact, it is impossible to draw a line,
1 Structural Analysis
Reference: MSDN http://msdn2.microsoft.com/zh-cn/magazine/cc163466.aspx
WF Monitoring Reference below: WF allows multiple tracking services (that is, you can add multiple trckingservice in wrokflowruntime), allowing multiple tracking service to be added to the runtime to support different business requirements, the tracking service is responsible for specific implementation, But ther
Code:
Overview
Data is transmitted through the use of variables.
Variables and parameters used in the activity
[In parameter]. The value of the correlated variable can be passed In. When the parameter is modified internally, the correlated variable is not changed.
[Out parameter] The correlated variable value cannot be passed in. When an internal parameter is modified, the associated variable is updated.
The value of the [In/Out parameter] correlated variable can be passed In. When the int
Instance Code: \ WF_WCF_Samples \ WF \ Basic \ CustomActivities \ Code-Bodied \ ExecutionProperties \OverviewIExecutionProperty Interface Definition: Provides the execution attribute mechanism, which is used to configure the Thread Local Storage (TLS) before and after the work item of the relevant activity ).
This interface has two members:CleanupWorkflowThread: exectionproperties is manipulated when TLS is destroyed.SetupWorkflowThread: sets Executi
Series Directory: WF Series 3 Out-of-the-Box Activities topic directory
3.2.1 CallExternalMethod ActivityCallExternalMethod Activity is an important component in the local communication service.To use this Activity, you must set two attributes:
InterfaceType: Specifies the interface used to define workflow communication.
MethodName: Specifies the method to be called.
Citation:
Why is CallExternalMethod limited to methods that call known interface
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