在 Thread.Sleep() 期间保持 UI 响应 [英] Keeping UI responsive during a Thread.Sleep()

问题描述

背景:我正在编写一个应用程序，它遍历服务器列表并获取有关每台机器的各种详细信息.在迭代过程中，我需要更新表单上的各种控件(以显示所获得信息的摘要).因为它正在遍历一个列表，所以我调用了 Thread.Sleep() 以允许用户在询问下一台机器之前有时间阅读信息.下面是我的代码:

Background: I am writing an application that iterates through a list of servers and obtains various details about each machine. During the iteration, I need to update various controls on the form (to display a summary of the obtained information). Because it is iterating through a list, I have called a Thread.Sleep() to allow the user time to read through the information before the next machine is interrogated. Below is my code:

Task TestTask = Task.Factory.StartNew(() =>
            {
                foreach (String IpAddress in ServersToCheck)
                {
                    if (IpAddress != String.Empty)
                    {
                        ServerBeingCheckedLabel.Text = IpAddress;
                        if (PingServer(IpAddress) == true)
                        {
                            PingChar_Label.ForeColor = Color.Green;
                            PingChar_Label.Text = "a";
                            CheckPermissionsAreValid(IpAddress);
                        }
                        else
                        {
                            PingChar_Label.ForeColor = Color.Red;
                            PingChar_Label.Text = "r";
                            PermChar_Label.ForeColor = Color.Red;
                            PermChar_Label.Text = "r";
                        }
                    }
                }
                Thread.Sleep(10000);
                this.BackColor = FormBackGroundColor;
                TestButton.Enabled = true;
                RunTimer.Enabled = true;
            }, CancellationToken.None, TaskCreationOptions.None, UiScheduler);

这对于更新表单上的控件很有效，但在 Thread.Sleep() 期间 UI 锁定.当然，如果 Thread.Sleep() 在一个单独的任务上被调用，UI 线程一直保持畅通无阻?

This works fine regarding updating the controls on the form, but during the Thread.Sleep() the UI locks up. Surely if the Thread.Sleep() is called on a separate task, the UI thread has remained unblocked?

推荐答案

Task.Delay 应该适合您的需求.

改变

Task.Factory.StartNew(() =>

到

Task.Factory.StartNew(async () =>

和改变

Thread.Sleep

到

await Task.Delay

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