WF4.0 Beta1 流程设计器与Activity Designer

WF4.0 Beta1 流程设计器与Activity Designer

数据类

public class myData

{

public string 结果

{ set; get; }

 

public string 说明

{ set; get; }

}

 

 

自定义Activity

public sealed class 节点<T> : NativeActivity<myData>

{

public 节点()

: base()

{

this.DisplayName = "";

 

}

 

string _n = "mywait";

public string 节点名

{

get { return _n; }

set { _n = value; }

}

 

string _s = "请输入内容";

public string 内容

{

get { return _s; }

set { _s = value; }

}

 

protected override void Execute(ActivityExecutionContext context)

{

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

context.CreateNamedBookmark(节点名, new BookmarkCallback(bookmarkCallback));

}

 

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

{

myData r = obj as myData;

 

if (r.结果 == "a")

{

System.Console.WriteLine("{0},请处理以下问题:", r.说明);

}

this.Result.Set(context, r);

}

}

 

自定义Designer

<sad:WorkflowElementDesigner x:Class="WpfApplication1.myDesigner"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:sad="clr-namespace:System.Activities.Design;assembly=System.Activities.Design"

xmlns:sadv="clr-namespace:System.Activities.Design.View;assembly=System.Activities.Design">

 

<sad:WorkflowElementDesigner.Resources>

 

<DataTemplate x:Key="d1">

<StackPanel>

<TextBlock Margin="0,5,0,0" Text="内容:" />

<TextBox Height="50" AcceptsReturn="True" Text="{Binding Path=ModelItem.内容}" />

</StackPanel>

 

</DataTemplate>

 

</sad:WorkflowElementDesigner.Resources>

 

<Grid >

<ContentPresenter ContentTemplate="{DynamicResource d1}" Content="{Binding}"/>

</Grid>

</sad:WorkflowElementDesigner>

 

流程设计器

<Window x:Class="WpfApplication1.Window1"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

Title="Window1" >

<StackPanel>

<StackPanel Orientation="Horizontal" >

<Button Content="启动流程" Width="80" Height="30" Click="Button_Click" />

<TextBlock Margin="20,0,0,0" Text="办理" />

 

<Button Name="yes" Content="同意" Width="80" Height="30" Click="yes_Click" />

<Button Name="nextUser" Content="交指定人再议" Width="80" Height="30" Click="nextUser_Click" />

<TextBox Name="tb" Width="200" />

</StackPanel>

 

<StackPanel Orientation="Horizontal" Loaded="StackPanel_Loaded">

 

<StackPanel xmlns:sad="clr-namespace:System.Activities.Design;assembly=System.Activities.Design">

<StackPanel Name="propertyPanel" />

<sad:ToolboxControl Width="250" Height="400" Name="toolbox" />

</StackPanel>

<ContentControl Height="800" Width="800" Name="desienerPanel" />

</StackPanel>

</StackPanel>

</Window>

public partial class Window1 : Window

{

public Window1()

{

InitializeComponent();

}

WorkflowDesigner designer;

private void StackPanel_Loaded(object sender, RoutedEventArgs e)

{

ToolboxCategoryItemsCollection toolList=new ToolboxCategoryItemsCollection("基本工具");

toolbox.Categories.Add(toolList);

toolList.Add(new ToolboxItemWrapper(typeof(节点<myData>), "节点"));

toolList.Add(new ToolboxItemWrapper(typeof(System.Activities.Statements.FlowSwitch), "分支"));

toolList.Add(new ToolboxItemWrapper(typeof(System.Activities.Statements.WriteLine), "输出"));

//======

 

DesignerMetadata dm = new DesignerMetadata();

dm.Register();

//-

 

AttributeTableBuilder builder = new AttributeTableBuilder();

builder.AddCustomAttributes(typeof(节点<myData>), new DesignerAttribute(typeof(myDesigner)));

MetadataStore.AddAttributeTable(builder.CreateTable());

 

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

 

designer = new WorkflowDesigner();

 

var root = new System.Activities.Statements.Flowchart();

 

var v = new System.Activities.Variable<myData>();

v.Name = "content";

v.Default = new myData();

root.Variables.Add(v);

designer.Load(root);

 

desienerPanel.Content=designer.View;

propertyPanel.Children.Add(designer.PropertyInspectorView);

}

 

WorkflowInstance myInstance;

public WorkflowInstance createInstanceFromXamlString(string xaml)

{

System.Text.UTF8Encoding utf8 = new System.Text.UTF8Encoding();

byte[] bs = utf8.GetBytes(xaml);

System.IO.MemoryStream memoryStream = new System.IO.MemoryStream(bs);

WorkflowElement activity = WorkflowXamlServices.Load(memoryStream);

WorkflowInstance myInstance = new WorkflowInstance(activity);

return myInstance;

}

 

 

 

private void Button_Click(object sender, RoutedEventArgs e)

{

System.Console.Clear();

myInstance = createInstanceFromXamlString(designer.Text);

myInstance.OnCompleted = delegate(WorkflowCompletedEventArgs ee) { System.Console.WriteLine("end"); };

myInstance.Run();

}

 

 

private void yes_Click(object sender, RoutedEventArgs e)

{

myData date = new myData();

date.结果 = "a";

date.说明 = tb.Text;

 

myInstance.ResumeBookmark("mywait", date);

}

 

private void nextUser_Click(object sender, RoutedEventArgs e)

{

myData date = new myData();

date.结果 = "b";

date.说明 = tb.Text;

myInstance.ResumeBookmark("mywait", date);

}

}

 

 

设计流程

设计如下流程

 

 

 

 

 

 

 

 

 

运行说明