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。