填满队列后停止线程工作

Question

停止基于标志 Finesedequeue 的线程在下面的线程方法中，我在停止按钮中做了一个循环（它的目的是在它填充名为 _textFromFilesQueue 的队列后停止该线程），主要问题是我的表格冻结了

这是我的代码：

线程方法：

 public static bool Finisedqueue ;
    public void  Read(string inputDirectoryPath)
    {

        try
        {
            Thread.CurrentThread.IsBackground = true;
            Finisedqueue = false;
            Console.WriteLine("thread 1 started");
            if (Form1.IsStarted)
            {
                Thread.Sleep(3000);
                var dir = new DirectoryInfo(inputDirectoryPath);
                FileInfo[] f = dir.GetFiles("*.txt");
                if (f.Length > 0)
                {
                    Console.WriteLine("{0} directory contains {1} Files",inputDirectoryPath,f.Length);
                    int counter = 0;
                    foreach (System.IO.FileInfo fi in f)
                    {   

                        counter++;
                        var filePath = Path.Combine(fi.DirectoryName, fi.Name);
                        string textFromFile = File.ReadAllText(filePath);
                        _textFromFilesQueue.Enqueue(textFromFile);
                        Console.WriteLine("The text inside file number {0} is : {1}",counter,textFromFile);
                       fi.Delete();
                        Console.WriteLine("deleting file number {0} from input folder",counter);


                    }
                    Finisedqueue = true;
                    Console.WriteLine("finished Deleting files");
                }

                else
                {
                    Console.WriteLine("{0} Has no files inside it ",inputDirectoryPath);
                }
            }

        }
        catch (Exception excep)
        {
            Console.WriteLine("An error occurred: '{0}'", excep);
            throw(excep); 

        }
    }

停止按钮点击：

        private void stop_Click(object sender, EventArgs e)
    {

        while (!Thread1.Finisedqueue)
        {
            Console.WriteLine("Queue from First Thread is still Enqueuing data");
        }
        Thread1Timer.Dispose();
        button3.Enabled = true;
        textBox3.Enabled = true;



    }
> the main problem in this is that my form is freezing 

如果有人可以帮助我，非常感谢您

Answer 1

当忙于等待时，最好睡一觉，这样你就可以给其他线程一个执行的机会。

while (!Thread1.Finisedqueue)
{
    Thread.Sleep(100);
    Console.WriteLine("Queue from First Thread is still Enqueuing data");
}

您还可以查看 Task 类 https://msdn.microsoft.com/en-us/library/system.threading.tasks.task(v=vs.110).aspx 非常适合异步操作，例如文件 IO，并且可以使用内置的 async/await 功能等待。

private Queue<string> q = new Queue<string>();
private Task readFilesTask;
public void ReadFiles(string inputDirectory)
{
    var files = Directory.GetFiles(inputDirectory, "*.txt", SearchOption.TopDirectoryOnly);
    foreach (var file in files)
    {
        var textFromFile = File.ReadAllText(file);
        q.Enqueue(textFromFile);
        File.Delete(file);
    }
}

private void start_Click(object sender, EventArgs e)
{
    readFilesTask = Task.Run(() => ReadFiles("//path/to/dir"));
}

private void stop_Click(object sender, EventArgs e)
{    
    readFilesTask.Wait();
    //readFilesTask.Wait(1000); // if you want kill the task after waiting for 1000 milliseconds
    //Enable buttons
}