WF4.0 基础篇 (二十七) WCF Workflow Service 在WCF中使用WF

例子下载:
http://files.cnblogs.com/foundation/wcfwfSample.rar



例子说明:

WCF Workflow Service

创建启用WF的WCF服务

例1:一个用于计算加法的服务

添加WCF Workflow Service

当添加完成后,

1.VS2010会自动生成一个模板,扩展名为xamlx,

2.在模板中添加两个Activity,[Receive]与[Send],其中[Receive]是用于接收客户端请求的,[Send]是用于向客户端发送消息的.

3.将[Receive]的[OperationName]设为[GetData],这就是WCF服务的方法名

4.添加一个int型变量[data],将[data]绑定到[Receive.Content]上,做为WCF服务方法名的参数





5.将[data]绑定到[Send.Content]上,做为WCF服务方法的返回值

设计流程

场景:

设计一个如下方式的服务



double addxy(double myX,double myY)

{

double myXY = yX + myY;

return myXY;

}



1.删除vs2001自动添加的data变量



2.添加double型变量[x],[y],[xy]



3. 将[Receive]的[OperationName]设为[addxy],将[CanCreateInstance] 属性设为[true]





4. 将[x],[y]绑定到[Receive.Content]上,做为WCF服务方法名的参数





5.将[xy]绑定到[Send.Content]上,做为WCF服务方法的返回值





6.添加[Assign]用于完成计算

客户端调用

1.添加一WPF程序





2.引用上面添加的[addService]服务







3. 完成WPF程序的如下设计

<Grid> <TextBox Height="23" HorizontalAlignment="Left" Margin="44,54,0,0" Name="x" VerticalAlignment="Top" Width="73" /> <TextBox Height="23" HorizontalAlignment="Right" Margin="0,54,258,0" Name="y" VerticalAlignment="Top" Width="77" Text=" " /> <TextBox Height="23" HorizontalAlignment="Left" Margin="340,0,0,234" Name="xy" VerticalAlignment="Bottom" Width="83" Text="" /> <TextBlock Height="23" HorizontalAlignment="Left" Margin="135,57,0,0" Name="textBlock1" Text="+" VerticalAlignment="Top" /> <Button Content="=" Height="23" HorizontalAlignment="Left" Margin="266,54,0,0" Name="add" VerticalAlignment="Top" Width="51" Click="add_Click" /> </Grid>

private void add_Click(object sender, RoutedEventArgs e) { myService.ServiceClient server = new myService.ServiceClient(); double myX = double.Parse(x.Text); double myY = double.Parse(y.Text); double myXY = server.addxy(myX, myY); xy.Text = myXY.ToString(); }

4. 调用结果

例2:自定义对象的传递

场景:

还是加法服务,但设计方式如下



class myData

{

double x,y,xy;

}



myData addxy(myData mydata)

{

mydata.xy=mydata.x + mydata.y;

return mydata;

}

添加WCF Workflow Service

添加一个名为addObjService的[WCF Workflow Service]

添加自定义数据类

namespace wcfwfSample { [DataContract()] public class myData { [DataMember()] public double x { set; get; } [DataMember()] public double y { set; get; } [DataMember()] public double xy { set; get; } } }

设计流程

客户端调用

1.添加一WPF程序

[WpfApplication2]



2.引用上面添加的[addObjService]服务





3. 完成WPF程序的如下设计

<Grid Name="dataRoot" Loaded="dataRoot_Loaded"> <TextBox Height="23" HorizontalAlignment="Left" Margin="44,54,0,0" VerticalAlignment="Top" Width="73" Text="{Binding Path=x,Mode=TwoWay}" /> <TextBox Height="23" HorizontalAlignment="Right" Margin="0,54,258,0" VerticalAlignment="Top" Width="77" Text="{Binding Path=y,Mode=TwoWay}"/> <TextBox Height="23" HorizontalAlignment="Left" Margin="340,0,0,234" VerticalAlignment="Bottom" Width="83" Text="{Binding Path=xy,Mode=TwoWay}" /> <TextBlock Height="23" HorizontalAlignment="Left" Margin="135,57,0,0" Name="textBlock1" Text="+" VerticalAlignment="Top" /> <Button Content="=" Height="23" HorizontalAlignment="Left" Margin="266,54,0,0" Name="add" VerticalAlignment="Top" Width="51" Click="add_Click" /> </Grid>

private void add_Click(object sender, RoutedEventArgs e) { myData data= dataRoot.DataContext as myData; ServiceClient server = new ServiceClient(); server.addxy(ref data); this.dataRoot.DataContext = data; } private void dataRoot_Loaded(object sender, RoutedEventArgs e) { dataRoot.DataContext = new myData(); }

4. 调用结果