在说wf HadleExternalEventActivity
外部触发的事件和工作流在出发之后使用调用的函数是两码事。可以这样认为所谓的接口只是提供了一种的对应关系。
1)首先是接口提供了能干什么?
2)接口的实现类来直接调调用接口中公开的方法,其实这里调用的就是在工作流中invoke中的方法。
所以将所谓的接口只是提供了一种的对应的方法。
例如下面的代码:
Test.cs
namespace HandleExternalEventActivityTest
{
// Args
[Serializable]
public class ArgsTest : ExternalDataEventArgs
{
public ArgsTest(Guid id) : base(id) { }
}
[Serializable]
public class TestImpl : ITest
{
public event EventHandler<ArgsTest> Agree;
public void OnAgree (ArgsTest arg)
{
if (Agree != null)
{
Agree(null, arg);
}
}
}
}
{
// Args
[Serializable]
public class ArgsTest : ExternalDataEventArgs
{
public ArgsTest(Guid id) : base(id) { }
}
[Serializable]
public class TestImpl : ITest
{
public event EventHandler<ArgsTest> Agree;
public void OnAgree (ArgsTest arg)
{
if (Agree != null)
{
Agree(null, arg);
}
}
}
}
ITest.cs
namespace HandleExternalEventActivityTest
{
[ExternalDataExchange]
public interface ITest
{
event EventHandler<ArgsTest> Agree;
}
}
{
[ExternalDataExchange]
public interface ITest
{
event EventHandler<ArgsTest> Agree;
}
}
Program.cs
namespace HandleExternalEventActivityTest
{
class Program
{
static void Main(string[] args) {
using(WorkflowRuntime workflowRuntime = new WorkflowRuntime())
{
ExternalDataExchangeService dataExchangeService = new ExternalDataExchangeService();
workflowRuntime.AddService(dataExchangeService);
TestImpl service = new TestImpl();
dataExchangeService.AddService(service);
AutoResetEvent waitHandle = new AutoResetEvent(false);
workflowRuntime.WorkflowCompleted += delegate(object sender, WorkflowCompletedEventArgs e) {waitHandle.Set();};
workflowRuntime.WorkflowTerminated += delegate(object sender, WorkflowTerminatedEventArgs e)
{
Console.WriteLine(e.Exception.Message);
waitHandle.Set();
};
WorkflowInstance instance = workflowRuntime.CreateWorkflow(typeof(HandleExternalEventActivityTest.Workflow1));
instance.Start();
//////////////////////////////////////////////////////////////////////////
// 这里时测试
Console.WriteLine("Press any key !");
Console.Read();
service.OnAgree(new ArgsTest(instance.InstanceId));
waitHandle.WaitOne();
}
}
}
}
{
class Program
{
static void Main(string[] args) {
using(WorkflowRuntime workflowRuntime = new WorkflowRuntime())
{
ExternalDataExchangeService dataExchangeService = new ExternalDataExchangeService();
workflowRuntime.AddService(dataExchangeService);
TestImpl service = new TestImpl();
dataExchangeService.AddService(service);
AutoResetEvent waitHandle = new AutoResetEvent(false);
workflowRuntime.WorkflowCompleted += delegate(object sender, WorkflowCompletedEventArgs e) {waitHandle.Set();};
workflowRuntime.WorkflowTerminated += delegate(object sender, WorkflowTerminatedEventArgs e)
{
Console.WriteLine(e.Exception.Message);
waitHandle.Set();
};
WorkflowInstance instance = workflowRuntime.CreateWorkflow(typeof(HandleExternalEventActivityTest.Workflow1));
instance.Start();
//////////////////////////////////////////////////////////////////////////
// 这里时测试
Console.WriteLine("Press any key !");
Console.Read();
service.OnAgree(new ArgsTest(instance.InstanceId));
waitHandle.WaitOne();
}
}
}
}
按照上面的思路其实就是定义了一种对应关系(其实这也是c#中delegate和event关键字的作用)如下:
Agree(null, arg);
实际上就是调用的是:
// workflow1.cs
private void OnAgree(object sender, ExternalDataEventArgs e)
{
Console.WriteLine("Agree !");
}
private void OnAgree(object sender, ExternalDataEventArgs e)
{
Console.WriteLine("Agree !");
}
这里只是为了理解使用‘对应’讲话理解,实际应该参加:
http://msdn.microsoft.com/en-us/library/8627sbea(v=VS.80).aspx
如果您觉得不错,欢迎扫码支持下。
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