c# - 接受多个参数的 BackgroundWorker 的替代方案？

Question

BackgroundWorker 对象允许我们将单个参数传递给 DoWorkEventHandler。

// setup/init:
BackgroundWorker endCallWorker = new BackgroundWorker();
endCallWorker.DoWork += new DoWorkEventHandler(EndCallWorker_DoWork);
...
endCallWorker.RunWorkerAsync(userName);

// the handler:
private void EndCallWorker_DoWork(object sender, DoWorkEventArgs e)
{
    string userName = e.Argument as string;
    ...
}

要传递多个参数，我必须将它们包装在一个对象中，就像这个糟糕的字符串数组:

// setup/init:

BackgroundWorker startCallWorker = new BackgroundWorker();
startCallWorker.DoWork += new DoWorkEventHandler(StartCallWorker_DoWork);
...
startCallWorker.RunWorkerAsync(new string[]{userName, targetNumber});


// the handler:
private void StartCallWorker_DoWork(object sender, DoWorkEventArgs e)
{
    string[] args = e.Argument as string[];
    string userName = args[0];
    string targetNumber = args[1];
}

是否有另一个对象或模式允许我们很好地传递多个参数，或者理想情况下，编写我们自己的签名？

Answer 1

您可以使用闭包 (Lambda):

backgroundWorker.DoWork += (s, e) => MyWorkMethod(userName, targetNumber);

或者用委托(delegate)(匿名方法)语法:

backgroundWorker.DoWork += 
    delegate(object sender, DoWorkEventArgs e)
    {
        MyWorkMethod(userName, targetNumber);
    };