HandlExternalEvent传递参数到自定义属性中

【IT168技术文档】

  需要用到ExternalDataEventArgs这个东东，需要自己继承一个这样的类

Serializable]
public class BillExternalDataEventArgs : ExternalDataEventArgs {
private Decimal _mycash;
public Decimal Cash {
get { return _mycash; }
set { _mycash = value; }
}
public BillExternalDataEventArgs(Guid instanceId,Decimal decCash) : base(instanceId) {
_mycash = decCash;
}
}然后在把对应的接口进行相应的调整
[ExternalDataExchange]
public interface IBillWorkFlow
{
Decimal GetCash(Decimal decCash);
event EventHandler<BillExternalDataEventArgs> BillSubmit;
event EventHandler<BillExternalDataEventArgs> BillOk;
}
[Serializable]
public class MyBillWorkFlow : IBillWorkFlow {
public MyBillWorkFlow() {
System.Diagnostics.Debug.WriteLine("MyBillWorkFlow Init");
}
Dictionary<string, EventHandler<BillExternalDataEventArgs>> _EventList = new Dictionary<string, EventHandler<BillExternalDataEventArgs>>();
public void RaisEvent(string strName,Guid guidInstanceId,Decimal decCash) {
if (_EventList[strName] != null)
{
try
{
EventHandler<BillExternalDataEventArgs> evehandler = _EventList[strName];
BillExternalDataEventArgs ede = new BillExternalDataEventArgs(guidInstanceId,decCash);
evehandler(this, ede);
}
catch {
}
}
}
public Decimal GetCash(Decimal decCash)
{
return decCash;
}
public event EventHandler<BillExternalDataEventArgs> BillSubmit
{
add {
System.Diagnostics.Debug.WriteLine("add BillSubmit event");
_EventList.Add("BillSubmit", value);
}
remove { _EventList.Remove("BillSubmit"); }
}
public event EventHandler<BillExternalDataEventArgs> BillOk
{
add { _EventList.Add("BillOk", value); }
remove { _EventList.Remove("BillOk"); }
}
}

  然后在工作流中定义

public Billdayone.BillExternalDataEventArgs _cash = default(Billdayone.BillExternalDataEventArgs);

  这个_cash就是宿主与工作流之间传递的重要属性。