在Silverlight中同步化操作 [英] Syncronizing actions in Silverlight

问题描述

我有一个Silverlight应用程序，使用动作从模型中获取数据（再次从WCF服务获取数据）。

我需要以某种方式同步两个ActionCallbacks ，或者等待他们，然后执行一些代码。

示例：

  _model.GetMyTypeList（list => 
 {
 MyTypeList.AddRange（list）; 
}）; 
 
 _model.GetStigTypeList（list => 
 {
 StigTypeList.AddRange（list）; 
}）; 
 
 doSomethingWhenBothHaveReturned（）; 
  

我知道我可以使用一个计数器跟踪有多少已经返回，但是没有更好的方式做到这一点？

编辑： user24601有一个很好的答案，但CountdownEvent不存在于silverlight，任何其他好的想法？ ：

解决方案

使用计数器解决问题我的自我：

  public class ActionWaitHandler 
 {
 private int _count; 
 private readonly Action _callback; 
 
 public ActionWaitHandler（int count，Action callback）
 {
 _count = count; 
 _callback = callback; 
} 
 
 public void Signal（）
 {
 _count--; 
 if（_count == 0）
 {
 _callback（）; 
} 
} 
} 
  

usage：

  public void method（）{
 var handler = new ActionWaitHandler（2，OnActionsComplete）; 
 
 _model.GetMyTypeList（list => 
 {
 MyTypeList.AddRange（list）; 
 handler .Signal（）; 
}）; 
 
 _model.GetStigTypeList（list => 
 {
 StigTypeList.AddRange（list）; 
处理函数.Signal（）; 
}）; 
} 
 
 public void OnActionsComplete（）
 {
 dosomething; 
} 
  

I have a Silverlight app that uses actions to get data from the model (which again gets the data from WCF services).

I need to somehow sync two ActionCallbacks, or wait for them, and then execute some code.

Example:

_model.GetMyTypeList(list =>
{
    MyTypeList.AddRange(list);
});

_model.GetStigTypeList(list =>
{
    StigTypeList.AddRange(list);
});

doSomethingWhenBothHaveReturned();

I know I can use a counter to keep track of how many has returned, but is there not a better way to do this?

EDIT: user24601 has a good answer, but CountdownEvent does not exist in silverlight, any other great ideas? :)

解决方案

Solved the problem my self, using a counter:

public class ActionWaitHandler
{
    private int _count;
    private readonly Action _callback;

    public ActionWaitHandler(int count, Action callback)
    {
        _count = count;
        _callback = callback;
    }

    public void Signal()
    {
        _count--;
        if (_count == 0)
        {
            _callback();
        }
    }
}

usage:

public void method() {
    var handler = new ActionWaitHandler(2, OnActionsComplete);

    _model.GetMyTypeList(list =>
    {
        MyTypeList.AddRange(list);
        handler .Signal();
    });

    _model.GetStigTypeList(list =>
    {
        StigTypeList.AddRange(list);
        handler .Signal();
    });
}

public void OnActionsComplete()
{
    dosomething;
}

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