WF4.0 Beta1 参数 Arguments

1 [In，Out，In/Out]参数使用说明 1

2 定义Arguments 1

3 In参数 1

3.1 [In参数]是[System.Activities.InArgument<T>]类型的属性, 1

3.2 设计时,可以在属性框中,对[In参数]的赋值,[In参数]的赋值要使用"表达式"方式 2

3.3 运行时,可以启动参数的方式对[In参数]赋值 2

3.4 [In参数]不能在实例的[OnCompleted]事件中用[WorkflowCompletedEventArgs.Outputs]得到 3

3.5 [In参数]不能用[Assign]赋值 3

3.6 [In参数]可以在流程内部被其它[表达式]引用 3

4 Out 参数 3

4.1 [Out参数]是[System.Activities.OutArgument<T>]类型的属性, 3

4.2 [Out参数]可在实例的[OnCompleted]事件中用[WorkflowCompletedEventArgs.Outputs]得到 4

4.3 运行时,可以启动参数的方式对[Out 参数]赋值 4

4.4 设计时,不能在属性框中,对[In参数]的赋值 4

4.5 [out参数]可用[Assign]赋值 5

4.6 [out参数]可以在流程内部被其它[表达式]引用 5

5 In/Out参数 5

5.1 1.[In/Out参数]是[System.Activities.InOutArgument<T>]类型的属性 5

5.2 2.运行时,可以启动参数的方式对[IN/Out 参数]赋值,可在实例的[OnCompleted]事件中用[WorkflowCompletedEventArgs.Outputs]得到[IN/Out 参数]值 5

5.3 设计时,不能在属性框中,对[In/Out参数]的赋值 6

5.4 [In/Out参数]可用[Assign]赋值 6

5.5 [In/Out参数]可以在流程内部被其它[表达式]引用 6

Arguments是WF的输出和输入接口.参数属性Direction，有In，Out，In/Out,Propery选项

[In，Out，In/Out]参数使用说明

	启动传参	OnCompleted 事件访问	属性栏赋值	表达式访问	Assign 赋值
In	V	X	V	V	X
Out	V	V	X	V	V
In/Out	V	V	X	V	V

定义

Arguments

In参数

[In参数]是[System.Activities.InArgument<T>]类型的属性,

代码定义方式

public class myElement : CodeActivity

{

protected override void Execute(CodeActivityContext context)

{

string v = s.Get(context);

System.Console.WriteLine(v);

}

public System.Activities.InArgument<string> s

{ set; get; }

}

xaml定义方式

<p:Activity mc:Ignorable=""

x:Class="WorkflowConsoleApplication3.myActivity"

xmlns="http://schemas.microsoft.com/netfx/2009/xaml/activities/design"

xmlns:__myActivity="clr-namespace:WorkflowConsoleApplication3;"

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">

<x:Members>

<x:Property Name="s" Type="p:InArgument(x:String)" />

</x:Members>

<p:WriteLine>[s]</p:WriteLine>

</p:Activity>

设计时,可以在属性框中,对[In参数]的赋值,[In参数]的赋值要使用"表达式"方式

流程

宿主

WorkflowInstance myInstance = new WorkflowInstance(new Sequence1());

myInstance.Run();

结果

运行时,可以启动参数的方式对[In参数]赋值

宿主

System.Collections.Generic.Dictionary<string, object> d = new Dictionary<string, object>();

d.Add("s", "wxwinter");

WorkflowInstance myInstance = new WorkflowInstance(new myElement(),d);

myInstance.Run();

结果

[In参数]不能在实例的[OnCompleted]事件中用[WorkflowCompletedEventArgs.Outputs]得到

[In参数]不能用[Assign]赋值

[In参数]可以在流程内部被其它[表达式]引用

Out 参数

[Out参数]是[System.Activities.OutArgument<T>]类型的属性,

代码定义方式如下:

public class myElement : CodeActivity

{

protected override void Execute(CodeActivityContext context)

{

string v = s.Get(context);

s.Set(context, "wxd:" + v);

}

public System.Activities.OutArgument<string> s

{ set; get; }

}

xaml定义方式

<p:Activity mc:Ignorable=""

x:Class="WorkflowConsoleApplication3.myActivity"

xmlns="http://schemas.microsoft.com/netfx/2009/xaml/activities/design"

xmlns:__myActivity="clr-namespace:WorkflowConsoleApplication3;"

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">

<x:Members>

<x:Property Name="s" Type="p:OutArgument(x:String)" />

</x:Members>

<p:WriteLine>[s]</p:WriteLine>

</p:Activity>

[Out参数]可在实例的[OnCompleted]事件中用[WorkflowCompletedEventArgs.Outputs]得到

class Program

{

static void Main(string[] args)

{

WorkflowInstance myInstance = new WorkflowInstance(new myElement());

myInstance.OnCompleted += completed;

myInstance.Run();

System.Console.Read();

}

static void completed(WorkflowCompletedEventArgs e)

{

System.Console.WriteLine(e.Outputs["s"].ToString());

}

运行时,可以启动参数的方式对[Out 参数]赋值

宿主

class Program

{

static void Main(string[] args)

{

System.Collections.Generic.Dictionary<string, object> d = new Dictionary<string, object>();

d.Add("s", "wxwinter");

WorkflowInstance myInstance = new WorkflowInstance(new myElement(),d);

myInstance.OnCompleted += completed;

myInstance.Run();

System.Console.Read();

}

static void completed(WorkflowCompletedEventArgs e)

{

System.Console.WriteLine(e.Outputs["s"].ToString());

}

结果

设计时,不能在属性框中,对[In参数]的赋值

[out参数]可用[Assign]赋值

[out参数]可以在流程内部被其它[表达式]引用

In/Out参数

1.[In/Out参数]是[System.Activities.InOutArgument<T>]类型的属性

代码定义方式

public class myElement : CodeActivity

{

protected override void Execute(CodeActivityContext context)

{

string v = s.Get(context);

s.Set(context, "wxd:" + v);

}

public System.Activities.InOutArgument<string> s

{ set; get; }

}

xoml方式

<p:Activity mc:Ignorable=""

x:Class="WorkflowConsoleApplication3.myActivity"

xmlns="http://schemas.microsoft.com/netfx/2009/xaml/activities/design"

xmlns:__myActivity="clr-namespace:WorkflowConsoleApplication3;"

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">

<x:Members>

<x:Property Name="s" Type="p:InOutArgument(x:String)" />

</x:Members>

<p:WriteLine>[s]</p:WriteLine>

</p:Activity>

2.运行时,可以启动参数的方式对[IN/Out 参数]赋值,可在实例的[OnCompleted]事件中用[WorkflowCompletedEventArgs.Outputs]得到[IN/Out 参数]值

class Program

{

static void Main(string[] args)

{

System.Collections.Generic.Dictionary<string, object> d = new System.Collections.Generic.Dictionary<string, object>();

d.Add("s", "wxwinter");

WorkflowInstance myInstance = new WorkflowInstance(new myElement(),d);

myInstance.OnCompleted += completed;

myInstance.Run();

System.Console.Read();

}

static void completed(WorkflowCompletedEventArgs e)

{

System.Console.WriteLine(e.Outputs["s"].ToString());

}