WF4.0 应用篇(四) IActivityToolboxService 自动化工具栏

 

WF4.0 应用篇(四) IActivityToolboxService 自动化工具栏

例子下载: http://files.cnblogs.com/foundation/IActivityToolboxServiceSample.rar

 

 

System.Activities.Presentation.IActivityToolboxService

 

在设计工作流的创时，

可以实现工具栏的上下文相关

如当一个Activity被添加到工作流中后,会自动在工具栏中显示与该Activity相关的Activity

当这个Activity从工作流中移除时,会自动在工具栏中隐藏相关的Activity

 

实现思路如下:

1.为Activity添加一个Designer

2.override Designer的 OnModelItemChanged方法

3.在 OnModelItemChanged方法内用IActivityToolboxService向工具栏添加关联的Activity

4.关联Activity的移除是自动完成的,不用代码

 

 

例

定义[myActivity],[myActivityOne],[myActivityTwo]

 

当向流程中添加[myActivity]时[myActivityOne],[myActivityTwo]自动出现在工具栏中

当这个[myActivity]从工作流中移除时,会自动在工具栏中隐藏[myActivityOne],[myActivityTwo]

 

myActivityOne myActivityTwo	任意
myActivity	[System.ComponentModel.Designer(typeof(myActivityDesigner))] public sealed class myActivity : CodeActivity {   public InArgument<string> Text { get; set; }   protected override void Execute(CodeActivityContext context) { string text = context.GetValue(this.Text); } }
myActivityDesigner	<sap:ActivityDesigner x:Class="IActivityToolboxServiceSample.myActivityDesigner" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:sap="clr-namespace:System.Activities.Presentation;assembly=System.Activities.Presentation" xmlns:sapv="clr-namespace:System.Activities.Presentation.View;assembly=System.Activities.Presentation"> <Grid>   </Grid> </sap:ActivityDesigner>
	public partial class myActivityDesigner { public myActivityDesigner() { InitializeComponent(); }   protected override void OnModelItemChanged(object newItem) {   base.OnModelItemChanged(newItem); System.Activities.Presentation.IActivityToolboxService toolboxService = (System.Activities.Presentation.IActivityToolboxService)this.Context.Services.GetService(typeof(System.Activities.Presentation.IActivityToolboxService));   toolboxService.AddCategory("myActivity自定义选卡"); toolboxService.AddItem("IActivityToolboxServiceSample.myActivityOne,IActivityToolboxServiceSample, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" , "myActivity自定义选卡"); oolboxService.AddItem("IActivityToolboxServiceSample.myActivityTwo,IActivityToolboxServiceSample, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null" , "myActivity自定义选卡"); } }
	IActivityToolboxServiceSample.myActivityOne,IActivityToolboxServiceSample, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null 的查看

 

使用