WF 4.0基礎篇(十八) Flowchar

本文例子說明

Flowchart 說明 Flowchart

類名 System.Activities.Statements.Flowchart 文件 System.Activities.dll 結構說明 繼承 NativeActivity

是一個 sealed類

override 了 [CacheMetadata方法] 與 [Execute方法]

[Variables]屬性 的類型為[ Collection<Variable>]

[StartNode]屬性 的類型為[FlowNode]

[Nodes]屬性 的類型為[Collection<FlowNode>]

功能說明  

FlowDecision

類名 System.Activities.Statements.FlowDecision 文件 System.Activities.dll 結構說明 繼承 FlowNode

是一個 sealed類

[Condition]屬性 的類型為[Activity<bool>]

[False]屬性 的類型為[FlowNode]

[True]屬性 的類型為[FlowNode]

功能說明  

FlowSwitch

類名 System.Activities.Statements.FlowSwitch 文件 System.Activities.dll 結構說明 繼承 FlowNode

是一個 sealed類

[Expression]屬性 的類型為[Activity<object>]

[Default]屬性 的類型為[FlowNode]

[Cases]屬性 的類型為[IDictionary<object, FlowNode>]

功能說明  

FlowStep

類名 System.Activities.Statements.FlowStep 文件 System.Activities.dll 結構說明 繼承 FlowNode

是一個 sealed類

[Action]屬性 的類型為[Activity]

[Next]屬性 的類型為[FlowNode]

功能說明  

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("-------請從下面選項中選擇一BookmarkName---------------------------");
System.Console.WriteLine("BookmarkName:{0}:,OwnerDisplayName:{1}",　v.BookmarkName,　v.OwnerDisplayName);
System.Console.WriteLine("================================");
}
}
}
else
{
MessageBox.Show("沒有創建實例");
}
}
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();
}

結果

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("創建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("-------請從下面選項中選擇一BookmarkName---------------------------");
System.Console.WriteLine("BookmarkName:{0}:,OwnerDisplayName:{1}",　v.BookmarkName,　v.OwnerDisplayName);
System.Console.WriteLine("================================");
}
}
}
else
{
MessageBox.Show("沒有創建實例");
}
}
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();
}

結果

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("創建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("-------請從下面選項中選擇一BookmarkName---------------------------");
System.Console.WriteLine("BookmarkName:{0}:,OwnerDisplayName:{1}",　v.BookmarkName,　v.OwnerDisplayName);
System.Console.WriteLine("================================");
}
}
}
else
{
MessageBox.Show("沒有創建實例");
}
}
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();
}

結果

本文例子下載：http://files.cnblogs.com/foundation/FlowcharSample.rar