winform 线程挂起无效果
代码如下：
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 pro7
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
public Thread t;
private void Form1_Load(object sender, EventArgs e)
{
CheckForIllegalCrossThreadCalls = false;
t = new Thread(gettime);
t.Start();
}
public void gettime()
{
while (true)
{
textBox1.Text = DateTime.Now.ToString();
Thread.Sleep(1000);
}
}

private void button1_Click(object sender, EventArgs e)
{
if (t.ThreadState == ThreadState.Running)
{
t.Suspend();
}
}

private void button2_Click(object sender, EventArgs e)
{
if (t.ThreadState == ThreadState.Suspended || t.ThreadState == ThreadState.SuspendRequested)
{
t.Resume();
}
}
}
}

[解决办法]

C# code

using System;using System.Threading;using System.Windows.Forms;namespace WindowsFormsApplication1{    public partial class Form1 : Form    {        public Form1()        {            InitializeComponent();        }        private ManualResetEvent _ManualResetEvent = new ManualResetEvent(true);        private Boolean _bAbort = false;        private void Form1_Load(object sender, EventArgs e)        {            CheckForIllegalCrossThreadCalls = false;            Thread t = new Thread(gettime);            t.Start();        }        public void gettime()        {            while (!_bAbort)            {                textBox1.Text = DateTime.Now.ToString();                Thread.Sleep(1000);                _ManualResetEvent.WaitOne();            }        }        private void button1_Click(object sender, EventArgs e)        {            _ManualResetEvent.Reset();        }        private void button2_Click(object sender, EventArgs e)        {            _ManualResetEvent.Set();        }        private void Form1_FormClosing(object sender, FormClosingEventArgs e)        {            _bAbort = true;        }    }}