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WF4.0 基础篇 (十八) Flowchart

2014年04月05日 ⁄ 综合 ⁄ 共 9737字 ⁄ 字号小中大 ⁄ 评论关闭

本节主要介绍WF4 中 Flowchart的使用

本文例子下载:

http://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