示例来自microsoft windows workflow foundation 4.0 cookbook P31

 

1.  Create a workfow project:

Create a new Workfow Console Application under the Chapter01 solution and

name the project as LoadUpWorkflowFromXML.

2.  Author a workfow:

Author the Workflow1.xaml fle; this workfow will print a string to console as shown

in the following screenshot:

3.  Create code to load up the workfow instance from an XAML string:

Open Program.cs fle and change code as follow:

using System;

using System.Activities;

using System.Activities.Statements;

using System.IO;

using System.Collections;

using System.Text;

using System.Activities.XamlIntegration;

namespace LoadUpWorkflowFromXML {

    class Program {

        static void Main(string[] args) {

            string filePath=           @"C:\WF4Cookbook\Chapter01\

LoadUpWFFromXML\Workflow1.xaml";

            string tempString="";

            StringBuilder xamlWFString = new StringBuilder();

            StreamReader xamlStreamReader =

                new StreamReader(filePath);

            while (tempString != null){

                tempString = xamlStreamReader.ReadLine();

                if (tempString != null) {

                    xamlWFString.Append(tempString);

                }

            }

            Activity wfInstance = ActivityXamlServices.Load(

                new StringReader(xamlWFString.ToString()));

            WorkflowInvoker.Invoke(wfInstance);

        }

    }

}