如何在不冻结 UI 的情况下暂停应用程序 [英] How to Pause an Application without Freezing the UI

问题描述

在我的点击事件中，我想在一定时间内显示一个不确定的进度条，然后恢复应用程序.我遇到的问题是我无法显示进度条.有人可以帮忙吗?

On my click event I want to show an indeterminate progressbar for a certain amount of time, and then resume the application. The problem I am having is that I cannot get the progressbar to show. Could someone help with this?

private void RunTestButton_Click(object sender, RoutedEventArgs e)
    {
        if (testRunning == false)
            {
                testRunning = true;

                //Set progress bar visibility
                PerformanceProgressbar.Visibility = Visibility.Visible;
                PerformanceProgressbar.IsIndeterminate = true;

                //Tell the app to pause for 5 seconds so the user sees the progress bar


                //Set progress bar visibility
                PerformanceProgressbar.IsIndeterminate = false;
                PerformanceProgressbar.Visibility = Visibility.Collapsed;

                testRunning = false;
            }
    }

推荐答案

您可以拨打 Task.Delay .. 和 await 结果:

You can call Task.Delay .. and await the result:

await Task.Delay(5000);

您还需要确保将您的活动标记为async:

You will need to make sure you mark your event as async too:

private async void RunTestButton_Click(object sender, RoutedEventArgs e)

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