Microsoft windows workflow foundation 4.0 cookbook

Microsoft windows workflow foundation 4.0 cookbook Preface 1 Chapter 1: Workflow Program 5 Introduction 5 Creating the first WF program: HelloWorkflow 6 Creating a WF program using C# Code 9 Initializing a WF program using InArguments 11 Creating a WF program using OutArgument 15 Creating a WF program using InOutArgument 17 Using Variable in a WF program 20 Running a WF program asynchronously 22 Customizing a MyReadLine activity with Bookmark 25 Converting a WF program instance to XAML 29 Loading up a WF program from an XAML file 31 Testing a WF program with a unit test framework 34 Debugging a WF program 36 Chapter 2: Built-in Flow Control Activities 41 Introduction 41 Using the Foreach activity 42 A number guessing game in Sequence 47 A number guessing game using a flowchart 49 Using the InvokeMethod activity 52 Using the Switch<T> activity in Sequence workflow 63 Using the FlowSwitch<T> activity 67 Using the Parallel activity 69 Using the ParallelForEach<T> activity 71 Using the Pick activity 73 Handling errors 78 ii Table of Contents Chapter 3: Messaging and Transaction 81 Introduction 81 Creating a pure WCF service 82 Receiving and replying to a WCF message 87 Receiving and replying to a WCF message in code workflow 92 Sending and receiving a reply to a WCF message 98 Sending and receiving a reply to a WCF message in code workflow 104 Using CancellationScope activity 108 Performing a transaction by using TransactionScope activity 112 Performing compensation by using Compensable activity 117 Performing manual compensation by using Compensate activity 120 Performing confirmation by using Confirm activity 122 Chapter 4: Manipulating Collections 125 Introduction 125 Printing collection items 125 Using AddToCollection<T> activity 130 Using ClearCollection<T> activity 133 Using RemoveFromCollection<T> activity 137 Using ExistsInCollection<T> activity 141 Chapter 5: Custom Activities 145 Introduction 145 Creating an activity by inheriting the root activity 147 Creating a FileWriter activity 150 Creating a SendEmail activity 153 Creating an Input Message activity using Bookmark 156 Creating an Asynchronous HTTP Get activity 158 Creating a Composite activity 161 Creating an Activity Designer for the SendEmail activity 164 Creating an Activity Designer for the MySquence activity 170 Chapter 6: WF4 Extensions 175 Introduction 175 Configuring ETW tracking 175 Creating FileTrackingParticipant 180 Configuring the SQL persistence store 182 Loading a persisted workflow from the database 185 Using a persistence participant to persist additional data 189 Using a customized extension 195