winform上传下载

//// <summary>
  /// WebClient上传文件至服务器
  /// </summary>
  /// <param name="fileNamePath">文件名，全路径格式</param>
  /// <param name="uriString">服务器文件夹路径</param>
  private void UpLoadFile(string fileNamePath,string uriString)
  {
   //string fileName = fileNamePath.Substring(fileNamePath.LastIndexOf("\\") + 1);
   NewFileName = DateTime.Now.ToString("yyMMddhhmmss") + DateTime.Now.Millisecond.ToString() + fileNamePath.Substring(fileNamePath.LastIndexOf("."));

   string fileNameExt = fileName.Substring(fileName.LastIndexOf(".") + 1);
   if(uriString.EndsWith("/") == false) uriString = uriString + "/";

   uriString = uriString + NewFileName;
   /**//// 创建WebClient实例
   WebClient myWebClient = new WebClient();
   myWebClient.Credentials = CredentialCache.DefaultCredentials;

   // 要上传的文件
   FileStream fs = new FileStream(fileNamePath, FileMode.Open, FileAccess.Read);
   //FileStream fs = OpenFile();
   BinaryReader r = new BinaryReader(fs);
   try
   {
    //使用UploadFile方法可以用下面的格式
    //myWebClient.UploadFile(uriString,"PUT",fileNamePath);
    byte[] postArray = r.ReadBytes((int)fs.Length);
    Stream postStream = myWebClient.OpenWrite(uriString,"PUT");
    if(postStream.CanWrite)
    {