C#文件断点续传实现方法

本文实例讲述了c#文件断点续传实现方法。分享给大家供大家参考。具体实现方法如下：

/// <summary>
/// 下载局域网文件
/// </summary>
/// <param name="path">文件路径，如：\\192.168.10.1\app\app\123.zip</param>
/// <param name="username">计算机名称</param>
/// <param name="password">计算机密码</param>
static void requestwindowsshared(string path, string username, string password)
{
 //文件总大小
 int allbytescount = 0;
 //每次传输大小
 int bytetemp = 1024;
 //当前位置
 int byteposition = 0;
 //剩下大小
 int remain = 0;
 system.net.filewebrequest request = null;
 system.net.filewebresponse response = null;
 system.io.stream stream = null;
 system.io.filestream filestream = null;
 try
 {
  uri uri = new uri(path);
  request = (system.net.filewebrequest)system.net.filewebrequest.create(uri);
  system.net.icredentials ic = new system.net.networkcredential(username, password);
  request.credentials = ic;
  response = (system.net.filewebresponse)request.getresponse();
  stream = response.getresponsestream();
  byte[] bytes = new byte[stream.length];
  stream.read(bytes, 0, bytes.length);
  string filename = system.environment.getfolderpath(environment.specialfolder.desktop) + "\\" + system.io.path.getfilename(path);
  filestream = new filestream(filename, system.io.filemode.create, system.io.fileaccess.write, system.io.fileshare.readwrite);
  allbytescount = bytes.length;
  remain = allbytescount;
  while (remain > 0)
  {
   filestream.write(bytes, byteposition, bytetemp);
   remain = remain - bytetemp;
   byteposition = byteposition + bytetemp;
   filestream.flush();
   if (remain < bytetemp)
    bytetemp = remain;
  }
  console.writeline("下载成功!");
 }
 catch (exception ex)
 {
  console.writeline(ex.message);
 }
 finally
 {
  filestream.close();
  filestream.dispose();
  stream.close();
  stream.dispose();
 }
}
/// <summary>
/// 上传文件
/// </summary>
/// <param name="path">共享目录路径+文件名称</param>
/// <param name="local">本地路径</param>
/// <param name="username">用户名</param>
/// <param name="password">密码</param>
static void responsewindowsshared(string path, string local, string username, string password)
{
 //文件总大小
 int allbytescount = 0;
 //每次传输大小
 int bytetemp = 1024;
 //当前位置
 int byteposition = 0;
 //剩下大小
 int remain = 0;
 system.net.filewebrequest request = null;
 system.io.stream stream = null;
 try
 {
  //时间戳 
  string strboundary = "----------" + datetime.now.ticks.tostring("x");
  uri uri = new uri(path);
  byte[] bytes = system.io.file.readallbytes(local);
  request = (system.net.filewebrequest)system.net.filewebrequest.create(uri);
  request.method = "post";
  //设置获得响应的超时时间（300秒） 
  request.timeout = 300000;
  request.contenttype = "multipart/form-data; boundary=" + strboundary;
  request.contentlength = bytes.length;
  system.net.icredentials ic = new system.net.networkcredential(username, password);
  request.credentials = ic;
  stream = request.getrequeststream();
  allbytescount = bytes.length;
  remain = allbytescount;
  while (remain > 0)
  {
   stream.write(bytes, byteposition, bytetemp);
   remain = remain - bytetemp;
   byteposition = byteposition + bytetemp;
   stream.flush();
   if (remain < bytetemp)
    bytetemp = remain;
  }
  console.writeline("上传成功!");
 }
 catch (exception ex)
 {
  console.writeline(ex.message);
 }
 finally
 {
  stream.close();
  stream.dispose();
 }
}

希望本文所述对大家的c#程序设计有所帮助。