WF4.0 BASICS () WCF Workflow Service uses WF in WCF

 

Download example:

Http://files.cnblogs.com/foundation/wcfwfSample.rar

 

Example:

 

WCF Workflow Service
Create a WF-enabled WCF Service

 

Example 1: a service used to calculate Addition
Add a WCF Workflow Service

 

After adding,

1. VS2010 automatically generates a template with the extension xamlx,

2. Add two activities to the template: [Receive] and [Send]. [Receive] is used to Receive client requests and [Send] is used to Send messages to the client.

3. Set [OperationName] of [Receive] to [GetData]. This is the method name of the WCF Service.

4. Add an int variable [data] and bind [data] to [Receive. Content] as a parameter of the WCF Service method name.

 

5. Bind [data] to [Send. Content] As the return value of the WCF Service method.

 

Design Process

Scenario:

Design a service as follows

 

Double addxy (double myX, double myY)

{

Double myXY = yX + myY;

Return myXY;

}

 

1. Delete the data variable automatically added by vs2001

 

2. Add double Variables [x], [y], [xy]

3. Set [OperationName] of [Receive] to [addxy], and set [CanCreateInstance] attribute to [true]

 

4. Bind [x] and [y] to [Receive. Content] as parameters of the WCF Service method name.

 

5. Bind [xy] to [Send. Content] As the return value of the WCF Service method.

 

6. Add [Assign] for computing

 

Client call

1. Add a WPF Program

 

2. reference the [addService] service added above

 

3. Complete the following design for the WPF Program

<Grid> <TextBox Height = "23" HorizontalAlignment = "Left" Margin = "44,54, 0, 0" Name = "x" VerticalAlignment = "Top" Width = "73 "/ <TextBox Height = "23" HorizontalAlignment = "Right" Margin = "," 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," Name = "textBlock1" Text = "+" verticalignment = "Top"/> <Button Content = "=" Height = "23" HorizontalAlignment = "Left" Margin = "266,54, 0, 0 "Name =" add "verticalignment =" 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. Call results

 

 

Example 2: custom object transfer

Scenario:

The addition service, but the design method is as follows:

 

Class myData

{

Double x, y, xy;

}

 

MyData addxy (myData mydata)

{

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

Return mydata;

}

 

Add a WCF Workflow Service

Add a [WCF Workflow Service] named addObjService

 

 

Add Custom Data class

Namespace wcfwfSample { [DataContract ()] Public Class MyData {   [DataMember ()] Public Double x   {Set; get ;}   [DataMember ()] Public Double y   {Set; get ;}   [DataMember ()] Public Double xy   {Set; get ;}   }   }

 

Design Process

Client call

1. Add a WPF Program

[WpfApplication2]

 

2. reference the [addObjService] service added above

 

 

3. Complete the following design for the WPF Program

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

Private Void add_Click (object sender, RoutedEventArgs e) { MyData data = dataRoot. DataContext 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. Call results