一个关于文件上传下载到文件到服务器的代码

msdn上有这方面的code。

在手机上或许也可以借鉴。

文件服务器的为http文件结构时，本地控制远程的服务器上的文件：

 

    public void UploadFileBinary(string localFile, string uploadUrl)
    {
        HttpWebRequest req = (HttpWebRequest)WebRequest.Create(uploadUrl);
        //req.Credentials = new NetworkCredential("Administrator", "aaa");//用户名,密码
        req.PreAuthenticate = true;
        req.Method = "PUT";
        req.AllowWriteStreamBuffering = true;

        // Retrieve request stream
        Stream reqStream = req.GetRequestStream();

        // Open the local file
        FileStream rdr = new FileStream(localFile, FileMode.Open);

        // Allocate byte buffer to hold file contents
        byte[] inData = new byte[4096];

        // loop through the local file reading each data block
        //  and writing to the request stream buffer
        int bytesRead = rdr.Read(inData, 0, inData.Length);
        while (bytesRead > 0)
        {
            reqStream.Write(inData, 0, bytesRead);
            bytesRead = rdr.Read(inData, 0, inData.Length);
        }

        rdr.Close();
        reqStream.Close();

        req.GetResponse();
    }

    public void DownloadFileBinary(string localFile, string downloadUrl)
    {
        HttpWebRequest req = (HttpWebRequest)WebRequest.Create(downloadUrl);
        req.Method = "GET";

        HttpWebResponse resp = (HttpWebResponse)req.GetResponse();

        // Retrieve response stream
        Stream respStream = resp.GetResponseStream();

        // Create local file
        FileStream wrtr = new FileStream(localFile, FileMode.Create);

        // Allocate byte buffer to hold stream contents
        byte[] inData = new byte[4096];

        // loop through response stream reading each data block
        //  and writing to the local file
        int bytesRead = respStream.Read(inData, 0, inData.Length);
        while (bytesRead > 0)
        {
            wrtr.Write(inData, 0, bytesRead);
            bytesRead = respStream.Read(inData, 0, inData.Length);
        }

        respStream.Close();
        wrtr.Close();
    }

 

文件存在的判断并没有写，不过也可以用强制转换HttpWebRequest来获取。