Question

我有一个循环运行的方法可能需要很长时间才能完成，因为它需要从API中获取数据。我想要做的是在前端显示一条消息，说明系统在每个循环中的进展情况。有没有办法在处理时更新前端？

      public static void GetScreenshot(List<string> urlList,    List<DesiredCapabilities> capabilities, String platform, Literal updateNote)
      {
        foreach (String url in urlList)
        {
          String siteName = new Uri(url).Host;

          String dir = AppDomain.CurrentDomain.BaseDirectory+ "/Screenshots/" + siteName + "/" + DateTime.Now.ToString("yyyy-MM-dd_HH-mm");
          foreach (DesiredCapabilities cap in capabilities)
          {
            String saveDirectory = "";
            if (platform == "btnGenDesktopScreens")
            {
              saveDirectory = dir + "/" + cap.GetCapability("os") + "-" + cap.GetCapability("os_version") + "-" + cap.GetCapability("browser") + cap.GetCapability("browser_version");
            }
            else if(platform == "btnMobile")
            {
              saveDirectory = dir + "/" + cap.GetCapability("platform") + "" + cap.GetCapability("device") + "-" + cap.GetCapability("browserName");
            }
            updateNote.Text += "<br/>" + cap.GetCapability("platform") + " - " + cap.GetCapability("device") + "-" + cap.GetCapability("browserName");
//I'd like to display a message here
            TakeScreenshot(url, cap, saveDirectory);
//I'd like to display a message here
          }
        }
      }

有没有人遇到过这样做的方法？

Answer 1

根据您将反馈返回给用户的方式，您可以通过在循环中使用HttpResponse.Flush将一部分HTML响应一次推送给用户来完成此操作。见https://msdn.microsoft.com/en-us/library/system.web.httpresponse.flush(v=vs.100).aspx

在回发期间更新前端

1 个答案: