是否可以在没有 BackgroundWorker 的情况下使 WinForms 响应？

Question

我有一个在 C# 中使用 WinForms 制作的程序，它使用了另一个开发人员提供的 API，并且它在主线程中必须是运行（因为它正在使用 WM_Messages ，但也可能有其他原因）-所以我不能使用 BackgroundWorker。我的程序运行s 至少 15 分钟 API。因此，当我运行它并单击表单时，它会冻结并崩溃，因为它没有响应。在使用 API?

时，我该怎么做才能使表单响应并且不触发 Windows 警报“应用程序未响应”

这是我运行循环给定文件夹中所有文件名的代码：

fApi.ApiSetDates(DateTime.MinValue, DateTime.MinValue, invoiceIssueDate.Year, invoiceIssueDate.Month);
try
    {
        if (fApi.ImportFakturFromXML(fileName) != 0)
        {
            throw new Exception(fApi.GetLastError());
        }
        File.Delete(fileName);
    }
    catch (Exception x)
    {
        MessageBox.Show(x.ToString());
    }

Answer 1

这是一个非设计人员生成的代码，用于一个小 Windows 表单，当其单独的按钮时，该表单在循环中执行许多长运行、UI 线程阻塞操作被点击。与我最初在评论中建议的 Timer 相比，此代码更具可读性和可维护性，并且比 D.Kastier 在他的回答的评论中建议的代码更直接。

namespace LongRunningLoop
{
   public partial class Form1 : Form
   {
      private bool m_Closed = false;

      public Form1()
      {
         InitializeComponent(); // set up button1
      }

      // async void event handler.  Usually async void
      // is a no-no, but here we really do want to fire and forget.
      // We prevent nasty things from happening by disabling the UI
      // before starting the main work and exiting if we detect
      // that the form has been closed.
      private async void button1_Click(object sender, EventArgs e)
      {
         // Disable the UI so there's no reentrancy during the Task.Delay()
         button1.Enabled = false;
         for (int i = 0; i < 60; i++)
         {
            if (m_Closed)
            {
               // Don't keep doing work if the user has closed the form
               break;
            }
            Thread.Sleep(5000); // A long-running, blocking call (sleep thread for 5 seconds)
            await Task.Delay(100); // Yield to allow other events to be processed
         }
         // Re-enable the UI
         button1.Enabled = true;
      }

      private void Form1_FormClosed(object sender, FormClosedEventArgs e)
      {
         // Set a flag to signal the loop to exit
         m_Closed = true;
      }
   }
}

是否可以在没有 BackgroundWorker 的情况下使 WinForms 响应？

Is it possible to make WinForms responsive without BackgroundWorker?

c#

winforms