WF4.0 BASICS (25) ActivityAction and InvokeAction

 

 

Download example:

Http://files.cnblogs.com/foundation/ActivityActionSample.rar

 

ActivityAction

 

Class Name	System. Activities. ActivityAction System. Activities. ActivityAction <T> System. Activities. ActivityAction <T1, T2> System. Activities. ActivityAction <T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16>
File	System. Activities. dll
Structure Description	System. Activities. ActivityDelegate Is a sealed class The [DisplayName] attribute is of the [string] type and is a set of parallel branches. The [Handler] attribute is of the [System. Activities. Activity] type and is the Activity to be executed. [Argument, Argument1, Argument2, Argument16] the attribute type is [System. Activities. DelegateInArgument <T>], used to pass Parameters
Function Description	ActivityAction, ActivityAction <T,> used together with the InvokeAction, InvokeAction <T,> activity in the process

 

 

 

 

InvokeAction

Class Name	System. Activities. Statements. InvokeAction System. Activities. Statements. InvokeAction <T> System. Activities. Statements. InvokeAction <T1, T2> System. Activities. Statements. InvokeAction <T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15, T16>
File	System. Activities. dll
Structure Description	Inherit NativeActivity Is a sealed class Override [CacheMetadata method] and [Execute method] and [Cancel method] [Action] The property type is [System. Activities. ActivityAction, ActivityAction <T,>], which is the ActivityAction to be called. [Argument, Argument1, Argument2, Argument16] attribute type: [System. Activities. InArgument <T>], used to pass Parameters
Function Description	ActivityAction, ActivityAction <T,> used together with the InvokeAction, InvokeAction <T,> activity in the process

 

 

 

Instructions for use

ActivityAction, ActivityAction <T,> is not added to the toolbar by default. You must manually add

 

 

 

 

Example
To implement the following functions:

Define a string variable [myVariable] in the process

Define an ActivityAction attribute parameter [myAction] in the process.

Add a [ActivityAction <T>] in the process. This activity will pass [myVariable] into [myAction] and call [myAction].

 

The specific content of [myAction] is specified during the creation process.

 

 

Process

 

Bind it to [InvokeAction] to bind the [myAction] To be executed. This step must be performed in the XAML file.

<InvokeAction X: TypeArguments = "x: String" Argument = "[myVariable]" Sap: VirtualizedContainerService. HintSize = "">   <PropertyReference X: TypeArguments = "ActivityAction (x: String )" PropertyName = "myAction"/>   </InvokeAction>

 

Host

TestWorkflow = new TestWorkflow ();   ActivityAction <string> activityAction = new ActivityAction <string> ();   ActivityAction. Argument = new DelegateInArgument <string> (); ActivityAction. Handler = new WriteLine () {Text = activityAction. Argument };   TestWorkflow. myAction = activityAction;   WorkflowInvoker. Invoke (testWorkflow );