WF4B1 的有返回值的Activity,Bookmark,有返回值Bookmark
WF4B1 的有返回值的Activity,Bookmark,有返回值Bookmark
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目錄
1????NativeActivity<T>????1
1.1????定義有返回值的Activity????1
1.2????使用????1
2????Bookmark說明????2
3????Bookmark????2
3.1????定義Activity????2
3.2????定義工作流????2
3.3????宿主????3
3.4????結(jié)果????3
4????Bookmark(有返回值)????3
4.1????定義Activity????3
4.2????定義工作流????4
4.3????宿主????4
4.4????結(jié)果????5
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NativeActivity<T>
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類名:System.Activities.NativeActivity<TResult>
基類:System.Activities.WorkflowElement<TResult>
文件: System.Activities.dll
類型:abstract (void Execute(System.Activities.ActivityExecutionContext context))
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定義有返回值的Activity
場景說明:有兩個(gè)[Int]參數(shù)v1,v2,返回值為v1+v2
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public class myActivity<T> : NativeActivity<int> { public System.Activities.InArgument<int> v1 { set; get; } ? public System.Activities.InArgument<int> v2 { set; get; } ? protected override void Execute(ActivityExecutionContext context) { int r =(int)v1.Get(context) + (int)v2.Get(context); this.Result.Set(context, r); } } |
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說明:
當(dāng)在設(shè)計(jì)器中添加有返回值的Activity時(shí),會(huì)出現(xiàn)一個(gè)對話框,要求指定返回值的類型
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使用
流程 | |
宿主 | WorkflowInstance myInstance = new WorkflowInstance(new Sequence1()); ? myInstance.Run(); ? System.Console.Read(); |
結(jié)果 |
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Bookmark說明
Bookmark可使用流程Idle并觸發(fā)流程的OnIdle
Bookmark
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要定義具備Bookmark的Activit,可從 NativeActivity繼承
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類名:System.Activities.NativeActivity
基類:System.Activities.WorkflowElement
文件: System.Activities.dll
類型:abstract (void Execute(System.Activities.ActivityExecutionContext context))
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定義Activity
? public class myBookmark : NativeActivity { ? public string bookmarkName { get; set; } protected override void Execute(ActivityExecutionContext context) { context.CreateNamedBookmark(bookmarkName); } } |
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定義工作流
<p:Activity mc:Ignorable="" x:Class="WorkflowConsoleApplication1.Sequence2" xmlns="http://schemas.microsoft.com/netfx/2009/xaml/activities/design" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:p="http://schemas.microsoft.com/netfx/2009/xaml/activities" xmlns:sad="clr-namespace:System.Activities.Debugger;assembly=System.Activities" xmlns:w="clr-namespace:WorkflowConsoleApplication1;assembly=WorkflowConsoleApplication1" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" > <p:Sequence > <p:WriteLine DisplayName="WriteLine:begin">["begin"]</p:WriteLine> <w:myBookmark bookmarkName="mywait" /> <p:WriteLine DisplayName="WriteLine:end">["end"]</p:WriteLine> </p:Sequence> </p:Activity> |
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宿主
<Window x:Class="WpfApplication1.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Window1" Height="300" Width="300"> <StackPanel> <Button Content="啟動(dòng)" Height="23" Name="button1" Width="75" Click="button1_Click" /> <Button Content="繼續(xù)" Height="23" Name="button2" Width="75" Click="button2_Click" /> ? </StackPanel> ? </Window> |
WorkflowInstance myInstance; private void button1_Click(object sender, RoutedEventArgs e) { myInstance = new WorkflowInstance(new Sequence2()); myInstance.OnIdle += idel; myInstance.Run(); ? } IdleAction idel() { System.Console.WriteLine("等待提交....."); return IdleAction.Nothing; } ? private void button2_Click(object sender, RoutedEventArgs e) { myInstance.ResumeBookmark("mywait",null); } |
結(jié)果
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Bookmark(有返回值)
要定義具備有返回值的Bookmark Activit,可從 NativeActivity<T>繼承
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類名:System.Activities.NativeActivity<TResult>
基類:System.Activities.WorkflowElement<TResult>
文件: System.Activities.dll
類型:abstract (void Execute(System.Activities.ActivityExecutionContext context))
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定義Activity
public sealed class bookmark<T> : NativeActivity<T> { public bookmark() : base() { } ? public string bookmarkName { get; set; } ? protected override void Execute(ActivityExecutionContext context) { context.CreateNamedBookmark(bookmarkName, new BookmarkCallback(bookmarkCallback)); ? } ? void bookmarkCallback(ActivityExecutionContext context, Bookmark bookmark, object obj) { this.Result.Set(context, (T)obj); ? } } |
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定義工作流
<p:Activity mc:Ignorable="" x:Class="myBookmarks.Sequence1" xmlns="http://schemas.microsoft.com/netfx/2009/xaml/activities/design" xmlns:m="clr-namespace:myBookmarks;assembly=myBookmarks" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:p="http://schemas.microsoft.com/netfx/2009/xaml/activities" xmlns:sad="clr-namespace:System.Activities.Debugger;assembly=System.Activities" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"> <p:Sequence> <p:Sequence.Variables> <p:Variable x:TypeArguments="x:String" Name="rs" /> </p:Sequence.Variables> <p:WriteLine DisplayName="開始">["請?zhí)峤灰庖?#34;]</p:WriteLine> <m:bookmark x:TypeArguments="x:String" DisplayName="等待意見" Result="[rs]" bookmarkName="mywait" /> <p:WriteLine DisplayName="顯示結(jié)果">[rs]</p:WriteLine> </p:Sequence> </p:Activity> |
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宿主
<Window x:Class="WpfApplication1.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Title="Window1" Height="300" Width="300"> <Canvas> <Button Canvas.Left="27" Canvas.Top="31" Content="啟動(dòng)流程" Height="23" Name="button1" Width="75" Click="button1_Click" /> <Button Canvas.Left="27" Canvas.Top="111" Content="繼續(xù)" Height="23" Name="button2" Width="75" Click="button2_Click" /> <TextBox Canvas.Left="123" Canvas.Top="112.157" Height="23" Name="textBox1" Width="120" /> </Canvas> </Window> |
WorkflowInstance myInstance; private void button1_Click(object sender, RoutedEventArgs e) { myInstance = new WorkflowInstance(new Sequence1()); myInstance.OnIdle += idel; myInstance.Run(); } ? IdleAction idel() { System.Console.WriteLine("等待提交....."); return IdleAction.Nothing; } ? private void button2_Click(object sender, RoutedEventArgs e) { myInstance.ResumeBookmark("mywait", this.textBox1.Text); } |
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結(jié)果
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轉(zhuǎn)載于:https://www.cnblogs.com/foundation/archive/2009/06/08/1498624.html
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