Question

我的Backgroundworker从路径中检索和计算，我需要返回一个字符串数组和一个double数组。如何将它们打包在一起？我知道返回的结果是这样的：

private void bgw_DoWork(object sender, DoWorkEventArgs e)
{
    int result = 2+2;
    e.Result = result;
}

private void bgw_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
    int result = (int)e.Result;
    MessageBox.Show("Result received: " + result.ToString());
}

我也尝试使用元组，但我的软件无法识别，我使用的是C＃2008快递版。

如何将两种不同类型的阵列组合在一起？

Answer 1

创建数据传输类型。例如：

class MyResult //Name the classes and properties accordingly
{
    public string[] Strings {get; set;}
    public double[] Doubles {get; set;}
}

private void bgw_DoWork(object sender, DoWorkEventArgs e)
{
    //Do work..
    e.Result = new MyResult {Strings =..., Doubles  = ...  };
}

private void bgw_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
    MyResult result = (MyResult)e.Result;
    //Do whatever with result
}

Answer 2

创建自定义类并将其传递给结果。

public class MyClass
{
    public MyClass(string[] strings, double[] doubles)
    {
        this.Strings = strings;
        this.Doubles = doubles;
    }

    public string[] Strings {get;set;}
    public double[] Doubles {get;set;}
}

private void bgw_DoWork(object sender, DoWorkEventArgs e)
{
    MyClass result = new MyClass(new string[] {"a", "b"}, new double[] {1d, 2d});
    e.Result = result;
}

private void bgw_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
  MyClass result = (MyClass)e.Result;
  // process further
}

Answer 3

创建专门用于保存结果的类。

public class BackgroundWorkResult
{
    public List<string> StringList {get;set;}
    public List<int> IntList {get;set;}
}

在分配e.Result = new BackgroundWorkResult() { ... };

时将结果包装在其中

通常最好为每种后台工作者创建一个类（对于Event Hanlders）。这样，如果在下一版本的代码中需要从BackgroundWorker返回的其他信息，则只需在结果类中添加属性即可。

如何从backgroundworker C＃返回多个结果

3 个答案: