WF4.0 基础篇 (二十六) Interop调用WF3.X的Activity

末蓝、 2022-04-01 14:38 149阅读 0赞

本节主要介绍Interop调用WF3.X的Activity

本文例子下载:

http://files.cnblogs.com/foundation/InteropSample.rar

本文例子说明

![040110_0648_WF401.png][]

# Interop调用WF3.X的Activity #

<table style="border-collapse:collapse;"> 
 <tbody> 
 <tr> 
 <td style="border-top:solid .5pt;border-left:solid .5pt;border-bottom:solid .5pt;border-right:solid .5pt;">类名</td> 
 <td style="border-top:solid .5pt;border-left:none;border-bottom:solid .5pt;border-right:solid .5pt;">System.Activities.Statements.Interop</td> 
 </tr> 
 <tr> 
 <td style="border-top:none;border-left:solid .5pt;border-bottom:solid .5pt;border-right:solid .5pt;">文件</td> 
 <td style="border-top:none;border-left:none;border-bottom:solid .5pt;border-right:solid .5pt;">System.Workflow.Runtime.dll</td> 
 </tr> 
 <tr> 
 <td style="border-top:none;border-left:solid .5pt;border-bottom:solid .5pt;border-right:solid .5pt;">结构说明</td> 
 <td style="border-top:none;border-left:none;border-bottom:solid .5pt;border-right:solid .5pt;">继承 NativeActivity, ICustomTypeDescriptor 是一个 sealed类 override 了 [CacheMetadata方法] 与 [Cancel方法] 与[Execute方法] override 了 [CanInduceIdle属性] [ActivityMetaProperties]属性的类型为[IDictionary&lt;string, object&gt;] [ActivityProperties]属性的类型为[IDictionary&lt;string, object&gt;] [ActivityType]属性的类型为[Type] </td> 
 </tr> 
 <tr> 
 <td style="border-top:none;border-left:solid .5pt;border-bottom:solid .5pt;border-right:solid .5pt;">功能说明</td> 
 <td style="border-top:none;border-left:none;border-bottom:solid .5pt;border-right:solid .5pt;"> [ActivityType属性]用于指定要调用的WF3.5的Activity的类型 当指定WF3.5的Activity的类型后,在设计器中会自动为WF3.5的Activity的绑定生成两个参数一个为[属性名],另一个为[属性名Out]</td> 
 </tr> 
 </tbody> 
</table>

![040110_0648_WF402.png][]

## 使用说明 ##

默认有WF4.0项目为\[.NET Framework 4 Client Profile\],要使用Interop,应将项目改为\[.NET Framework 4 \]

![040110_0648_WF403.png][]

Interop默认没出现在工具栏中,需要添加

![040110_0648_WF404.png][]

\[ActivityType属性\]用于指定要调用的WF3.5的Activity的类型

![040110_0648_WF405.png][]

![040110_0648_WF406.png][]

当指定WF3.5的Activity的类型后,在设计器中会自动为WF3.5的Activity的绑定生成两个参数一个为\[属性名\],另一个为\[属性名Out\]

![040110_0648_WF407.png][]

## 例子1:调用WF3.X的Activity ##

说明:

1.创建一WF3.X的Activity,有一绑定属性\[printText\]

Activity在\[ Execute\]方法中打印\[printText\]的值,并为\[printText\]赋予一新值

2.创建一WF4的工作流,用\[Interop\]调用WF3.X的Activity,为\[printText\]传入值,并打印通过\[printText\]的返回值

<table style="border-collapse:collapse;"> 
 <tbody> 
 <tr> 
 <td style="border-top:solid .5pt;border-left:solid .5pt;border-bottom:solid .5pt;border-right:solid .5pt;">WF3.X的Activity</td> 
 <td style="border-top:solid .5pt;border-left:none;border-bottom:solid .5pt;border-right:solid .5pt;"> public partial class myActivity : Activity { public myActivity() { InitializeComponent(); } &nbsp; [System.Diagnostics.DebuggerNonUserCode] [System.CodeDom.Compiler.GeneratedCode("", "")] private void InitializeComponent() { this.Name = "myActivity"; } &nbsp; public static readonly DependencyProperty printTextProperty = DependencyProperty.Register("printText", typeof(string), typeof(myActivity)); &nbsp; public string printText { get { return (string)base.GetValue(printTextProperty); } set { base.SetValue(printTextProperty, value); } } &nbsp; protected override ActivityExecutionStatus Execute(ActivityExecutionContext context) { Console.WriteLine(this.printText); this.printText = printText + ":wxd"; return ActivityExecutionStatus.Closed; } } </td> 
 </tr> 
 <tr> 
 <td style="border-top:none;border-left:solid .5pt;border-bottom:solid .5pt;border-right:solid .5pt;">WF4的工作流</td> 
 <td style="border-top:none;border-left:none;border-bottom:solid .5pt;border-right:solid .5pt;"><img src="https://images.cnblogs.com/cnblogs_com/foundation/040110_0648_WF408.png" alt=""></td> 
 </tr> 
 <tr> 
 <td style="border-top:none;border-left:solid .5pt;border-bottom:solid .5pt;border-right:solid .5pt;">宿主</td> 
 <td style="border-top:none;border-left:none;border-bottom:solid .5pt;border-right:solid .5pt;"> static void test1() { WorkflowInvoker.Invoke(new testWorkflow()); &nbsp; } </td> 
 </tr> 
 <tr> 
 <td style="border-top:none;border-left:solid .5pt;border-bottom:solid .5pt;border-right:solid .5pt;">结果</td> 
 <td style="border-top:none;border-left:none;border-bottom:solid .5pt;border-right:solid .5pt;"><img src="https://images.cnblogs.com/cnblogs_com/foundation/040110_0648_WF409.png" alt=""></td> 
 </tr> 
 </tbody> 
</table>

## 例2:代码操作 ##

<table style="border-collapse:collapse;"> 
 <tbody> 
 <tr> 
 <td style="border-top:solid .5pt;border-left:solid .5pt;border-bottom:solid .5pt;border-right:solid .5pt;"> static void test2() { &nbsp; Variable&lt;string&gt; myVariable = new Variable&lt;string&gt;() { Default = "wxwinter" }; Sequence root = new Sequence() { Variables = { myVariable }, Activities = { &nbsp; new Interop() { ActivityType = typeof(myActivity), ActivityProperties = { &nbsp; { "printText", new InArgument&lt;string&gt;(myVariable) } , { "printTextOut", new OutArgument&lt;string&gt;(myVariable) } &nbsp; }, ActivityMetaProperties = { // Provide a value for the Name meta-property of the WriteLine { "Name", "myActivity" } } } , new WriteLine{ Text=myVariable} } }; &nbsp; WorkflowInvoker.Invoke(root); } </td> 
 </tr> 
 <tr> 
 <td style="border-top:none;border-left:solid .5pt;border-bottom:solid .5pt;border-right:solid .5pt;"><img src="https://images.cnblogs.com/cnblogs_com/foundation/040110_0648_WF4010.png" alt=""></td> 
 </tr> 
 </tbody> 
</table>

[040110_0648_WF401.png]: /images/20220401/d4d1590b5d3d4e7c87c0f19048f9d904.png
[040110_0648_WF402.png]: /images/20220401/8681a06bda7f42ea862b239513a1e48d.png
[040110_0648_WF403.png]: /images/20220401/8b8ab63b50db4c85b43e12d27bd8c936.png
[040110_0648_WF404.png]: /images/20220401/c346361cd55043b784911c3cc39db82f.png
[040110_0648_WF405.png]: /images/20220401/9ffb40c794b04ce6adcea4ddc7720888.png
[040110_0648_WF406.png]: /images/20220401/53171ae8f14d4aeaa0c13e3fb46b21de.png
[040110_0648_WF407.png]: /images/20220401/d9e953ad15da4f3a9cf0d48a19253105.png