C＃ - 通过网络流接收文件阻止了WPF UI [英] C# - receiving a file through network stream is blocking WPF UI

问题描述

嗨。

我有这种接收文件的方法。

公共任务下载（IProgress< int> downloadProgress）
 {
返回Task.Run 
（
 async（）=> 
 {
 var counter = 0; 
 
 var buffer = new byte [1024]; 
 
 while（true）
 {
 var byteCount = await _networkStream.ReadAsync（ buffer，0，buffer.Length）; 
 
 counter + = byteCount; 
 downloadProgress.Report（counter）; 
 
 if（byteCount！= buffer.Length） 
休息; 
} 
} 
）; 
} 

然后在UI中我调用

 await StartDownloading（progress）; 

其中进度只是更新标签。

当我运行它时，它会阻止UI。我不知道为什么，Task.Run（）不应该在一个单独的线程上运行任务吗？

我该如何解决？

解决方案

您好，

 这是一个旧帖子的链接，似乎有您的问题;

  https://social.msdn.microsoft.com/Forums/sqlserver/en-US/d22af66c-cbdb-4866-8d14 -19c1abfdc71d / wpf-c-using-tasks？forum = wpf

 希望这会有所帮助：）

Hi.

I have this method for receiving a file.

public Task Download(IProgress<int> downloadProgress)
{
    return Task.Run
    (
        async () =>
        {
            var counter = 0;

            var buffer = new byte[1024];

            while (true)
            {
                var byteCount = await _networkStream.ReadAsync(buffer, 0, buffer.Length);

                counter += byteCount;
                downloadProgress.Report(counter);

                if (byteCount != buffer.Length)
                    break;
            }
        }
    );
}

Then in the UI I call

await StartDownloading(progress);

where progress is simply updating a label.

When I run it, it blocks UI. I have no idea why, shouldn't Task.Run() make task running on a seperate thread?

How do I fix it please?

解决方案

Hello,

 Here is a link to an older posting that seems to have had your issue;

 https://social.msdn.microsoft.com/Forums/sqlserver/en-US/d22af66c-cbdb-4866-8d14-19c1abfdc71d/wpf-c-using-tasks?forum=wpf

 Hope this helps :)

这篇关于C＃ - 通过网络流接收文件阻止了WPF UI的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！