为什么使用了BackgroundWorker,窗体还是处于假死状态,赐教
private void MyBackWorker_ProgressChanged(object sender, ProgressChangedEventArgs e)
{
try
{
this.MyBar.Value = e.ProgressPercentage;
this.labMessage.Text = e.UserState.ToString();
this.labMessage.Update();
}
catch(Exception Ex)
{
MessageBox.Show(Ex.Message.ToString());
}
}

private void MyBackWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
//线程处理完成时
try
{
MessageBox.Show("完成!");
}
catch(Exception Ex)
{
MessageBox.Show(Ex.Message.ToString());
}
}

private void MyBackWorker_DoWork(object sender, DoWorkEventArgs e)
{
//开始执行后台程序
try
{
this.work(MyBackWorker,e);
}
catch(Exception Ex)
{
MessageBox.Show(Ex.Message.ToString());
}
}

private void work(BackgroundWorker bk,DoWorkEventArgs e)
{
int Nums = 1000000;
for (int i = 1; i < Nums; i++)

{
if (bk.CancellationPending)
{
bk.ReportProgress(i, String.Format("当前值是 {0},操作被用户申请中断", i));
e.Cancel = true;
break;
}
bk.ReportProgress(i, String.Format("当前值是 {0} ", i));
}
}

private void btnStart_Click(object sender, EventArgs e)
{
try
{
this.MyBackWorker.RunWorkerAsync();
}
catch(Exception Ex)
{
MessageBox.Show(Ex.Message.ToString());
}
}

private void btnStop_Click(object sender, EventArgs e)
{
try
{
this.MyBackWorker.CancelAsync();
}
catch(Exception Ex)
{
MessageBox.Show(Ex.Message.ToString());
}
}
[最优解释]
问题在于循环体执行太快了，ReportProgress后，界面来不及处理，看起来是假死。

定义一个全局变量，tempTime = DateTime.Now;
然后把下面的代码加到For体的最上面，你就能看到效果。
if (DateTime.Now.Subtract(tempTime).Ticks == 0)
continue;
else
tempTime = DateTime.Now;


[其他解释]
循环太快了，可以没循环500次 执行一次 MyBackWorker_ProgressChanged
[其他解释]
每十次循环，Sleep（10）试试
------其他解决方案--------------------

        private void button2_Click(object sender, EventArgs e)
        {
            BackgroundWorker wb = new BackgroundWorker();
            wb.DoWork += wb_DoWork;
            wb.WorkerReportsProgress = true;
            wb.ProgressChanged += wb_ProgressChanged;
            wb.RunWorkerCompleted += wb_RunWorkerCompleted;
            wb.RunWorkerAsync();
        }

        void wb_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
        {
            this.button2.Text = "OK";
        }

        void wb_ProgressChanged(object sender, ProgressChangedEventArgs e)
        {
            this.progressBar1.Value = e.ProgressPercentage;
        }

        void wb_DoWork(object sender, DoWorkEventArgs e)
        {
            int i = 0;
            while (i < 100)
            {
                ((BackgroundWorker)sender).ReportProgress(i);
                i++;
                Thread.Sleep(300);
            }
        }

给个简单例子给你看。
[其他解释]
帮顶了，我是不会啊！
[其他解释]

引用:

问题在于循环体执行太快了，ReportProgress后，界面来不及处理，看起来是假死。

定义一个全局变量，tempTime = DateTime.Now;
然后把下面的代码加到For体的最上面，你就能看到效果。
if (DateTime.Now.Subtract(tempTime).Ticks == 0)
continue;
else
tempTime = Dat……

非常感谢几位兄弟,搞定!