文件下载源码

public void DownLoad(string FileName,Page R)
  {
   if (FileName != "")
   {
    string path = R.Server.MapPath(FileName);
    System.IO.FileInfo file = new System.IO.FileInfo(path);
    if (file.Exists)
    {
     R.Response.Clear();
     R.Response.AddHeader("Content-Disposition", "attachment; FileName=" + file.Name);
     R.Response.AddHeader("Content-Length", file.Length.ToString());
     R.Response.ContentType = "application/octet-stream";
     R.Response.Filter.Close();
     R.Response.WriteFile(file.FullName);         
     R.Response.End();
    }
    else
    {
     R.Response.Write("This file does not exist.");
    }

   }

示例 二:

private void NewDownLoad(string Path,string FileName)
        {//Path为文件绝对路径,FileName为文件路径
            FileStream fs=new FileStream(Path,FileMode.Open,FileAccess.Read);
            BinaryReader r=new BinaryReader(fs);
            Response.AddHeader("Content-Disposition","attachment;filename="+FileName);
            Response.Charset="gb2312";
            Response.ContentType="application/octet-stream";
            Response.BinaryWrite(r.ReadBytes(Convert.ToInt32(fs.Length)));
            Response.Flush();
            fs.Close();
            try
            {
                File.Delete(Path);
            }
            catch(System.Exception ee)
            {
                string ff=ee.ToString();
            }
        }

示例三:

文件下载#region 文件下载
        private void DownLoadFile(string address,string filename)
        {//address 文件下载路径,filename文件存放的本地路径
            WebClient client=new WebClient();
            client.DownloadFile(address,filename);
            Stream str=client.OpenRead(address);
            StreamReader reader=new StreamReader(str);
            byte[] mbyte=new byte[str.Length+1];
            int allmybyte=(int)mbyte.Length;
            int startmbyte=0;
            while(allmybyte>0)
            {
                int m=str.Read(mbyte,startmbyte,allmybyte);
                if(m==0)
                {
                    break;
                }
                startmbyte+=m;
                allmybyte-=m;
            }
            FileStream fstr=new FileStream(filename,FileMode.OpenOrCreate,FileAccess.Write);
            fstr.Write(mbyte,0,startmbyte);
            str.Close();
            fstr.Close();
        }
        #endregion