C#创建一个ProgressBar 进度条，为了演示效果，这里可以设置高、中、低三个速度来演示，进度条的C#例子已经有很多，有兴趣的可以在本站搜索一下哦。-C# Create a ProgressBar progress bar, in order to demonstrate the effect, where you can set high, medium and low speed to demonstrate, C# examples of the progress bar has a