Question

我有两种方法退出计划。

首先：

namespace FirstTheard
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();

            this.StartPosition = FormStartPosition.CenterScreen;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Thread T1 = new Thread(new ThreadStart(DoWork));
            T1.Name = "Primery Thread";
            T1.Start();

        }

        private void DoWork()
        {
            var threadName = Thread.CurrentThread.Name;
            for (int i = 0; i <= 20; i++)
            {
                Invoke(new Action(() =>
                { 
                    label1.Text += "ThreadName is-------"+threadName+"\n";
                }));
                Thread.Sleep(100);
            }

        }
    }
}

输出：
ThreadName是-------主线程

第二

namespace FirstTheard
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();

            this.StartPosition = FormStartPosition.CenterScreen;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Thread T1 = new Thread(new ThreadStart(DoWork));
            T1.Name = "Primery Thread";
            T1.Start();

        }

        private void DoWork()
        {
            //var threadName = Thread.CurrentThread.Name;
            for (int i = 0; i <= 20; i++)
            {
                Invoke(new Action(() =>
                { 
                    label1.Text += "ThreadName is-------"+ Thread.CurrentThread.Name + "\n";
                }));
                Thread.Sleep(100);
            }

        }
    }
}

输出：
ThreadName是-------

为什么两个输出不同？

请帮帮我

Answer 1

Thread.CurrentThread.Name为您提供读取此属性的线程的名称。

在第一种情况下，您可以在创建的线程T1上访问（读取）此属性。在第二种情况下，您可以在UI线程上访问该属性（因为通过Invoke进行调用）。由于您没有为主UI线程设置任何名称，因此该属性返回一个空字符串。

Answer 2

Invoke将控制权返回给UI线程。

Answer 3

在第一个示例中，您正在访问Thread.CurrentThread.Name 在线程t1中，即t1.Name

然而，在第二个示例中，您正在访问Thread.CurrentThread.Name中的Invoke，在这种情况下，它将是主GUI /事件线程，它没有任何名称。请记住，Invoke将在拥有控件底层窗口句柄的线程上执行指定的委托。

Answer 4

我想我明白了谢谢大家

此代码显示我的意思

namespace FirstTheard

{ 公共部分类Form1：表格 { public string CurrentThread; 公共Form1（） { 的InitializeComponent（）;

        this.StartPosition = FormStartPosition.CenterScreen;
    }

    private void button1_Click(object sender, EventArgs e)
    {
        //Position of thread now is "Primery Thread"
        CurrentThread = Thread.CurrentThread.Name= "Primery Thread";
        label1.Text = CurrentThread + "\n";
        Thread T1 = new Thread(new ThreadStart(DoWork));
        T1.Name = "Secondery Thread";
        T1.Start();
    }

    private void DoWork()
    {
        //Position of thread now is "Secondary Thread" or T1
        var threadName = Thread.CurrentThread.Name;
        for (int i = 0; i <= 20; i++)
        {
            Invoke(new Action(() =>
            {
                //Position of thread now is "Primery Thread" again
                label1.Text += "ThreadName at T1 is-------"+ threadName + "         " + "ThreadName in the Invoke is-------" + Thread.CurrentThread.Name+ "\n";
            }));
            Thread.Sleep(100);
        }

    }

}

}

thread.name在我的代码中给出了两个不同的答案

4 个答案: