C#解冻Windows UI界面的方法

本范例演示了C#开发GUI程序时如何避免一个超长处理过程占用全部资源，导致界面不能响应用户事件的方法

// You need the Threading library to use the 
// "Thread.Sleep" function
// using System.Threading;
 
// This boolean value can be used to stop the
// process below
bool UserHitCancel = false;
 
this.progressBar.Maximum = 100;
 
// Loop 100 times
for (int i = 0; (i < 100 && !UserHitCancel); i++)
{
    // Update a progressbar or any other control
    this.progressBar.Value = i;
 
    // This function checks if the user fired any
    // events, like clicks on a cancel button and 
    // allowes the application to react 
    Application.DoEvents();
 
    // This tells the current thread to sleep for 50 milliseconds,
    // so that the user can see the progress bar filling up
    Thread.Sleep(TimeSpan.FromMilliseconds(50));
}