如何让在&QUOT方法运行;背景" (线程?) [英] How to make a method run in the "background" (threading?)

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问题描述

目前,我有一些code到一个文本文件中循环寻找一个特定的短语。然而,这种方法运行时,整个应用程序锁定。我想是因为它的循环,这正是我想要的。

我想这样的事情发生在后台,所以正常的方法和用户与应用程序交互还是可以完成的。

如何才能做到这一点/改进?

 私人无效CheckLog()
{
    而(真)
    {
        //让拿到一个破发
        Thread.sleep代码(5000);

        如果(!File.Exists(Command.bat))
        {
            继续;
        }

        使用(StreamReader的SR = File.OpenText(Command.bat))
        {
            字符串s =;

            而((S = sr.ReadLine())!= NULL)
            {
                如果(s.Contains(MP4:生产/))
                {
                    //输出它
                    的MessageBox.show(多个);
                }
            }
        }
    }
}
 

解决方案

使用

 类Foo {
    私人螺纹螺纹;
    私人无效CheckLog(){...}
    私人无效StartObserving(){
        线程=新主题(this.CheckLog);
        thread.Start();
    }
}
 

或从调色板中BackgroundWorker组件。

I currently have some code that cycles through a text file looking for a specific phrase. However, when this method runs, the whole application locks up. I assume because it's looping, which is what I want.

I would like this to happen in the background, so normal methods and user interaction with the application can still be done.

How can this be done/improved?

private void CheckLog()
{   
    while (true)
    {
        // lets get a break
        Thread.Sleep(5000); 

        if (!File.Exists("Command.bat"))
        {
            continue;
        }

        using (StreamReader sr = File.OpenText("Command.bat"))
        {
            string s = "";

            while ((s = sr.ReadLine()) != null)
            {
                if (s.Contains("mp4:production/"))
                {
                    // output it
                    MessageBox.Show(s);
                }
            }
        }
    }
}

解决方案

Use

class Foo {
    private Thread thread;
    private void CheckLog() {...}
    private void StartObserving() {
        thread = new Thread(this.CheckLog);
        thread.Start();
    }
}

or the backgroundworker component from the palette.

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