1. 支持多线程: 多个线程某时刻下载同一个文件的不同块.

2. 断点续传: 如果下载了一个文件的某些块(一半), 则下次下载时只需下载未完成的块 文件块的下载状态用控制文件记录. 块下载完成的先后顺序不一定是连续的.

3、注意：默认下载目录为D:\temp，确认该目录有Everyone可写权限，默认测试下载文件为一Asp.net源码-1. Support multi-threaded: multiple threads of a moment to download a file with different block .2. HTTP: If you downloaded a file certain block (half), then the next download when the download is not just completed in block block file download status with control documented. block the download is complete the order in which they are not necessarily consecutive .3, pay attention: the default download directory is D: emp, confirm that the directory has write permission to Everyone, the default test download document One source for Asp.net