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WF4.0 基础篇 (十八) Flowchart

2013-10-13 16:31 567 查看
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






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