C#使用WebResponse实现断点续传

来源：互联网发布：115 mac 离线编辑：程序博客网时间：2024/06/05 05:33

代码如下，最好还需要加上文件版本判断，确定是不是同一个文件，不要是牛头马面了

 fileStream   =   new   FileStream(Path,FileMode.Append,FileAccess.Write);       inStream   =   null;     try     {         HttpWebRequest   myre=(HttpWebRequest)WebRequest.Create(URL);         if(fileStream.Length   ==   myre.ContentLength)     {     MessageBox.Show("你以完成下载该程序了","ok");     return;     }                                                   myre.AddRange(Convert.ToInt32(fileStream.Length));//接上次下载的字节开始下载文件     HttpWebResponse   response   =   (HttpWebResponse)myre.GetResponse();     inStream   =response   .GetResponseStream();     this.progressBar1.Maximum   =   total;     this.progressBar1.Minimum   =0;     int   length   =   1024;     byte[]   buffer   =   new   byte[1025];     int   readerLength   =   0,currentLength=0;     while((readerLength   =inStream.Read(buffer,0,length))>   0)     {     currentLength   +=     readerLength   ;     fileStream.Write(buffer,0,readerLength);     this.progressBar1.Value   =currentLength   +   countByte;     }     fileStream.Close();     inStream.Close();     File.Delete(Application.StartupPath   +@"\FileLength.txt");     MessageBox.Show("down   成功","ok");