winform上传文件至服务器

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1.使用WebClient类

①直接上传文件，不带参数

    WebClient myWebClient = new WebClient();     myWebClient.Headers.Add("Content-Type", "application/x-www-form-urlencoded");     byte[] post = myWebClient.UploadFile(服务器路径, "POST", 本地文件路径);

②带参数上传，对文件类型有限制，可上传一般文本文件

       FileStream fs = new FileStream(本地文件路径, FileMode.Open, FileAccess.Read);       byte[] byteFile = new byte[fs.Length];       fs.Read(byteFile, 0, Convert.ToInt32(fs.Length));       fs.Close();       string postData = "filename=" + fileName + "&filecontent=" + (Encoding.UTF8.GetString(byteFile));       WebClient myWebClient = new WebClient();       myWebClient.Headers.Add("Content-Type", "application/x-www-form-urlencoded");       byte[] post = myWebClient.UploadData(<span style="font-family: Arial, Helvetica, sans-serif;">服务器路径</span>, "POST", Encoding.UTF8.GetBytes(postData));

2.直接写方法，这种对文件类型和大小都有限制

       FileStream fs = new FileStream(本地文件路径, FileMode.Open, FileAccess.Read);       byte[] byteFile = new byte[fs.Length];       fs.Read(byteFile, 0, Convert.ToInt32(fs.Length));       fs.Close();System.Net.ServicePointManager.Expect100Continue = false;       System.Net.HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);       request.Timeout = 10000;       request.Method = "POST";       request.Headers.Set("Pragma", "no-cache");       using (HttpWebResponse response = (HttpWebResponse)request.GetResponse())       using (Stream streamReceive = response.GetResponseStream())       using (StreamReader streamReader = new StreamReader(streamReceive, encoding))       {          string ret = streamReader.ReadToEnd();       }

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