更改Thread.Name属性时候出现的无法更改问题，求助额~~~~

Question

先贴错误提示再贴代码

“System.InvalidOperationException”类型的未经处理的异常出现在 mscorlib.dll 中。

调试中断的地方为thread1.Name = "";和thread2.Name = "";的地方
其他信息: 该属性已经设置，不能修改。

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Threading;

namespace _2._1_2._2
{
    public partial class Form1 : Form
    {
       public Form1()
        {
            InitializeComponent();
            CheckForIllegalCrossThreadCalls = false;
        }
        public void btn1_change()
        {
            int i = 0;
            for(; i < 10; i++)
            {
                Thread thread1 = Thread.CurrentThread;
               thread1.Name = "btn1_change";

                label1.Text = String.Format("{0},{1}", i,  thread1.Name);
                label1.Refresh();
                Thread.Sleep(500);
            }
        }
          public void btn2_change()
        {
            int i = 0;
            for(; i < 10; i++)
            {
                Thread thread2 = Thread.CurrentThread;
                thread2.Name = "btn2_change";
                label2.Text = String.Format("{0},{1}", i, thread2.Name);

                label2.Refresh();
                Thread.Sleep(500);
            }
        }
       

        private void button1_Click(object sender, EventArgs e)
        {
            Thread thread1 = new Thread(new ThreadStart(btn1_change));
           
            thread1.Start();


            Thread thread2 = new Thread(new ThreadStart(btn2_change));
            thread2.Start();
        }
      
    }
}
 

---

vortex.piggy

Answer 1

为什么没有人回答额....这个貌似不应该出现的问题把我搞的好纠结额，希望同志们能拉我一把~~感激不尽

---

vortex.piggy

Answer 2

简单的说，threa.Name 是个write-once property,所以你第一次赋值以后就不能再次修改它了，，至于为什么这么设计的原因你可以参考下面的2个URL

http://social.msdn.microsoft.com/Forums/en-SG/netfxbcl/thread/c59593fb-4961-4eb9-9321-f165d96fa9ef

http://blogs.msdn.com/b/bclteam/archive/2003/11/11/49736.aspx

Answer 3

多谢回答噢~~不过我每个线程都只命名过一次额, 为什么也有这种问题呢？

---

vortex.piggy

Answer 4

“其他信息: 该属性已经设置，不能修改” 提示信息不是写的很清楚了嘛，这肯定是你命名过一次后的再次赋值。

Answer 5

麻烦帮忙看下代码中在哪重复赋值了好么，多谢多谢~

---

vortex.piggy

Answer 6

请改为如下的代码：

usingSystem;
usingSystem.Collections.Generic;
usingSystem.ComponentModel;
usingSystem.Data;
usingSystem.Drawing;
usingSystem.Linq;
usingSystem.Text;
usingSystem.Windows.Forms;
usingSystem.Threading;

namespace_2._1_2._2
{
    publicpartialclassForm1:Form
    {
       publicForm1()
        {
            InitializeComponent();
            CheckForIllegalCrossThreadCalls=false;
        }
        publicvoidbtn1_change()
        {
            int i =0; thread1.Name="btn1_change";

            for(;i <10;i++)
            {
                Threadthread1 =Thread.CurrentThread;
              
                label1.Text=String.Format("{0},{1}",i,  thread1.Name);
                label1.Refresh();
                Thread.Sleep(500);
            }
        }
          publicvoidbtn2_change()
        {
            int i =0; thread2.Name="btn2_change";

            for(;i <10;i++)
            {
                Threadthread2 =Thread.CurrentThread;
                                label2.Text=String.Format("{0},{1}",i,thread2.Name);

                label2.Refresh();
                Thread.Sleep(500);
            }
        }
      

        privatevoidbutton1_Click(objectsender,EventArgse)
        {
            Threadthread1 =newThread(newThreadStart(btn1_change));thread1.Start();


            Threadthread2 =newThread(newThreadStart(btn2_change));
            thread2.Start();
        }
     
    }
}

Answer 7

噢！！！！！！！！我嘞个去。。。原来如此，明白了。。。。。多谢多谢

---

vortex.piggy