Question

现在我每次只能报告一个值：

private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
        {            
            BackgroundWorker worker = sender as BackgroundWorker;

            if ((worker.CancellationPending == true))
            {
                e.Cancel = true;
            }
            else
            {
                List<IntPtr> intptrs = GetProcessesIntptrList();
                for (int x = 0; x < intptrs.Count ; x++)
                {
                    GetProcessInfo(intptrs[x]);
                }
                    while (true)
                    {

                        procList = Process.GetProcesses().ToList();
                        for (int i = 0; i < procList.Count; i++)
                        {
                            Process[] processes = Process.GetProcessesByName(procList[i].ProcessName);
                            PerformanceCounter performanceCounter = new PerformanceCounter();
                            performanceCounter.CategoryName = "Process";
                            performanceCounter.CounterName = "Working Set - Private";//"Working Set";
                            performanceCounter.InstanceName = processes[0].ProcessName;
                            worker.ReportProgress(0, ((uint)performanceCounter.NextValue() / 1024).ToString("N0"));
                        }
                    }
            }
        }

在progresschanged事件中：

private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
        {
            label4.Text = e.UserState.ToString();
        }

但是我有更多标签，或者我可以根据dowork事件循环中报告的值的数量来创建标签。

但我们的想法是向每个标签报告一个值。而不是报告同一标签上的所有值。

Answer 1

根据建议，创建一个自定义类来保存要报告的每个进程的进度。

public class MyProgress{
    public string Id {get;set;}
    public string Progress {get;set;}
}

如果您想在每次循环执行时报告所有进程的累积值（即将List传递给ReportProgress调用）：

while (true)
{
    List<MyProgress> prog = new List<MyProgress>();

    procList = Process.GetProcesses().ToList();
    for (int i = 0; i < procList.Count; i++)
    {
        Process[] processes = Process.GetProcessesByName(procList[i].ProcessName);
        PerformanceCounter performanceCounter = new PerformanceCounter();
        performanceCounter.CategoryName = "Process";
        performanceCounter.CounterName = "Working Set - Private";//"Working Set";
        performanceCounter.InstanceName = processes[0].ProcessName;

        prog.Add(new MyProgress { Id = procList[i].ProcessName, Progress = ((uint)performanceCounter.NextValue() / 1024).ToString("N0")});
    }

    worker.ReportProgress(0, prog);
}

然后更新事件处理程序以对我们的列表执行某些操作：

private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
    foreach (p in (e.UserState as List<MyProgress>))
    {
        // Just output to console - could update label, etc...
        Console.WriteLine("Progress for {0} is {1}", p.Id, p.Progress);
    }
}

如何在backgroundworker dowork事件中使用reportprogress多次报告？

1 个答案: