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  • WF4.0 基础篇 (十八) Flowchar

    本节主要介绍WF4 中 Flowchart的使用

     

    本文例子下载:

    https://files.cnblogs.com/foundation/FlowcharSample.rar

    本文例子说明

     

    Flowchart 说明

    Flowchart

    类名

    System.Activities.Statements.Flowchart

    文件

    System.Activities.dll

    结构说明

    继承 NativeActivity

    是一个 sealed类

    override 了 [CacheMetadata方法] 与 [Execute方法]

    [Variables]属性 的类型为[ Collection<Variable>]

    [StartNode]属性 的类型为[FlowNode]

    [Nodes]属性 的类型为[Collection<FlowNode>]

    功能说明

    		 

     

     

     

    FlowDecision

    类名

    System.Activities.Statements.FlowDecision

    文件

    System.Activities.dll

    结构说明

    继承 FlowNode

    是一个 sealed类

    [Condition]属性 的类型为[Activity<bool>]

    [False]属性 的类型为[FlowNode]

    [True]属性 的类型为[FlowNode]

    功能说明

    		 

     

     

     

     

    FlowSwitch

    类名

    System.Activities.Statements.FlowSwitch

    文件

    System.Activities.dll

    结构说明

    继承 FlowNode

    是一个 sealed类

    [Expression]属性 的类型为[Activity<object>]

    [Default]属性 的类型为[FlowNode]

    [Cases]属性 的类型为[IDictionary<object, FlowNode>]

    功能说明

    		 

     

     

     

    FlowStep

     

    类名

    System.Activities.Statements.FlowStep

    文件

    System.Activities.dll

    结构说明

    继承 FlowNode

    是一个 sealed类

    [Action]属性 的类型为[Activity]

    [Next]属性 的类型为[FlowNode]

    功能说明

    		 

     

     

    例

    Flowchart基本使用

    工作流

    宿主

    //===================================================

     

    WorkflowApplication instance = null;

     

    private void button_triggering_Click(object sender, RoutedEventArgs e)

    {

    string bookName = textBox_bookmark.Text;

    string inputValue = textBox_value.Text;

     

    if (instance != null)

    {

    if (instance.GetBookmarks().Count(p => p.BookmarkName == bookName) == 1)

    {

    instance.ResumeBookmark(bookName, inputValue);

    }

    else

    {

    foreach (var v in instance.GetBookmarks())

    {

    System.Console.WriteLine("-------请从下面选项中选择一BookmarkName---------------------------");

    System.Console.WriteLine("BookmarkName:{0}:,OwnerDisplayName:{1}", v.BookmarkName, v.OwnerDisplayName);

    System.Console.WriteLine("================================");

    }

    }

    }

    else

    {

    MessageBox.Show("没有创建实例");

    }

     

    }

     

    void workflowCompleted(WorkflowApplicationCompletedEventArgs e)

    {

    instance = null;

    System.Console.WriteLine("workflowCompleted:{0}", e.CompletionState.ToString());

    }

     

    void aborted(WorkflowApplicationAbortedEventArgs e)

    {

    instance = null;

    System.Console.WriteLine("aborted ,Reason:{0}", e.Reason.Message);

    }

     

    UnhandledExceptionAction unhandledExceptionl(WorkflowApplicationUnhandledExceptionEventArgs e)

    {

    System.Console.WriteLine("unhandledException:{0}", e.UnhandledException.Message);

    return UnhandledExceptionAction.Cancel;

    }

    void workflowIdel(WorkflowApplicationIdleEventArgs e)

    {

    System.Console.WriteLine("Idle:{0}", e.InstanceId);

     

    System.Console.WriteLine("--------BookmarkName---------------------------");

    foreach (var item in e.Bookmarks)

    {

    System.Console.WriteLine("{0}", item.BookmarkName);

    }

    System.Console.WriteLine("================================");

    }

    //==================================================

     

    private void button_baseFlowchartWorkflow_Click(object sender, RoutedEventArgs e)

    {

    instance = new WorkflowApplication(new FlowcharLibrary.baseFlowchartWorkflow());

     

    instance.Completed = new Action<WorkflowApplicationCompletedEventArgs>(workflowCompleted);

    instance.OnUnhandledException = unhandledExceptionl;

    instance.Aborted = aborted;

    instance.Idle = workflowIdel;

    instance.Run();

     

    }

    结果

     

    FlowDecision 例子

    工作流

    bookmark

    public sealed class bookmark<T> : NativeActivity<T>

    {

    public InArgument<string> bookmarkName { get; set; }

     

    protected override bool CanInduceIdle

    {

    get

    { return true; }

    }

    protected override void Execute(NativeActivityContext context)

    {

    string bookmark = context.GetValue(bookmarkName);

    context.CreateBookmark(bookmark, new BookmarkCallback(bookmarkCallback));

    System.Console.WriteLine("创建bookmark:{0}", bookmark);

    }

    void bookmarkCallback(NativeActivityContext context, Bookmark bookmark, object obj)

    {

     

    if (typeof(T) == typeof(Int32))

    {

    this.Result.Set(context, int.Parse(obj.ToString()) );

    return;

    }

     

    if (typeof(T) == typeof(string))

    {

    this.Result.Set(context, obj.ToString());

    return;

    }

     

    this.Result.Set(context,obj);

    }

    }

    宿主

    //===================================================

     

    WorkflowApplication instance = null;

     

    private void button_triggering_Click(object sender, RoutedEventArgs e)

    {

    string bookName = textBox_bookmark.Text;

    string inputValue = textBox_value.Text;

     

    if (instance != null)

    {

    if (instance.GetBookmarks().Count(p => p.BookmarkName == bookName) == 1)

    {

    instance.ResumeBookmark(bookName, inputValue);

    }

    else

    {

    foreach (var v in instance.GetBookmarks())

    {

    System.Console.WriteLine("-------请从下面选项中选择一BookmarkName---------------------------");

    System.Console.WriteLine("BookmarkName:{0}:,OwnerDisplayName:{1}", v.BookmarkName, v.OwnerDisplayName);

    System.Console.WriteLine("================================");

    }

    }

    }

    else

    {

    MessageBox.Show("没有创建实例");

    }

     

    }

     

    void workflowCompleted(WorkflowApplicationCompletedEventArgs e)

    {

    instance = null;

    System.Console.WriteLine("workflowCompleted:{0}", e.CompletionState.ToString());

    }

     

    void aborted(WorkflowApplicationAbortedEventArgs e)

    {

    instance = null;

    System.Console.WriteLine("aborted ,Reason:{0}", e.Reason.Message);

    }

     

    UnhandledExceptionAction unhandledExceptionl(WorkflowApplicationUnhandledExceptionEventArgs e)

    {

    System.Console.WriteLine("unhandledException:{0}", e.UnhandledException.Message);

    return UnhandledExceptionAction.Cancel;

    }

    void workflowIdel(WorkflowApplicationIdleEventArgs e)

    {

    System.Console.WriteLine("Idle:{0}", e.InstanceId);

     

    System.Console.WriteLine("--------BookmarkName---------------------------");

    foreach (var item in e.Bookmarks)

    {

    System.Console.WriteLine("{0}", item.BookmarkName);

    }

    System.Console.WriteLine("================================");

    }

    //==================================================

    private void button_FlowDecisionWorkflow_Click(object sender, RoutedEventArgs e)

    {

    instance = new WorkflowApplication(new FlowcharLibrary.FlowDecisionWorkflow());

     

    instance.Completed = new Action<WorkflowApplicationCompletedEventArgs>(workflowCompleted);

    instance.OnUnhandledException = unhandledExceptionl;

    instance.Aborted = aborted;

    instance.Idle = workflowIdel;

    instance.Run();

    }

     

    结果

     

    FlowSwitch 例子

    工作流

    bookmark

    public sealed class bookmark<T> : NativeActivity<T>

    {

    public InArgument<string> bookmarkName { get; set; }

     

    protected override bool CanInduceIdle

    {

    get

    { return true; }

    }

    protected override void Execute(NativeActivityContext context)

    {

    string bookmark = context.GetValue(bookmarkName);

    context.CreateBookmark(bookmark, new BookmarkCallback(bookmarkCallback));

    System.Console.WriteLine("创建bookmark:{0}", bookmark);

    }

    void bookmarkCallback(NativeActivityContext context, Bookmark bookmark, object obj)

    {

     

    if (typeof(T) == typeof(Int32))

    {

    this.Result.Set(context, int.Parse(obj.ToString()) );

    return;

    }

     

    if (typeof(T) == typeof(string))

    {

    this.Result.Set(context, obj.ToString());

    return;

    }

     

    this.Result.Set(context,obj);

    }

    }

    宿主

    //===================================================

     

    WorkflowApplication instance = null;

     

    private void button_triggering_Click(object sender, RoutedEventArgs e)

    {

    string bookName = textBox_bookmark.Text;

    string inputValue = textBox_value.Text;

     

    if (instance != null)

    {

    if (instance.GetBookmarks().Count(p => p.BookmarkName == bookName) == 1)

    {

    instance.ResumeBookmark(bookName, inputValue);

    }

    else

    {

    foreach (var v in instance.GetBookmarks())

    {

    System.Console.WriteLine("-------请从下面选项中选择一BookmarkName---------------------------");

    System.Console.WriteLine("BookmarkName:{0}:,OwnerDisplayName:{1}", v.BookmarkName, v.OwnerDisplayName);

    System.Console.WriteLine("================================");

    }

    }

    }

    else

    {

    MessageBox.Show("没有创建实例");

    }

     

    }

     

    void workflowCompleted(WorkflowApplicationCompletedEventArgs e)

    {

    instance = null;

    System.Console.WriteLine("workflowCompleted:{0}", e.CompletionState.ToString());

    }

     

    void aborted(WorkflowApplicationAbortedEventArgs e)

    {

    instance = null;

    System.Console.WriteLine("aborted ,Reason:{0}", e.Reason.Message);

    }

     

    UnhandledExceptionAction unhandledExceptionl(WorkflowApplicationUnhandledExceptionEventArgs e)

    {

    System.Console.WriteLine("unhandledException:{0}", e.UnhandledException.Message);

    return UnhandledExceptionAction.Cancel;

    }

    void workflowIdel(WorkflowApplicationIdleEventArgs e)

    {

    System.Console.WriteLine("Idle:{0}", e.InstanceId);

     

    System.Console.WriteLine("--------BookmarkName---------------------------");

    foreach (var item in e.Bookmarks)

    {

    System.Console.WriteLine("{0}", item.BookmarkName);

    }

    System.Console.WriteLine("================================");

    }

    //==================================================

     

    private void button_FlowSwitchWorkflow_Click(object sender, RoutedEventArgs e)

    {

    instance = new WorkflowApplication(new FlowcharLibrary.FlowSwitchWorkflow());

     

    instance.Completed = new Action<WorkflowApplicationCompletedEventArgs>(workflowCompleted);

    instance.OnUnhandledException = unhandledExceptionl;

    instance.Aborted = aborted;

    instance.Idle = workflowIdel;

    instance.Run();

    }

    结果

     

     
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  • 原文地址：https://www.cnblogs.com/foundation/p/1642615.html
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