程式碼

/// <summary>
    /// 上傳圖片到第三方伺服器
    /// </summary>
    /// <param name="filePath"></param>
    /// <param name="picNo"></param>
    /// <returns></returns>
    public string UploadFilesToBlueBox(string filePath, string picNo)
    {
        string strReturn = "";
        
 
string fileName = Path.GetFileName(filePath);
        string strPostUrl = "http://pic.xxx.com/HttpPost_Upload.aspx?PICID=" + picNo + "&FILENAME=" + fileName;
        HttpWebRequest reqPost = (HttpWebRequest)WebRequest.Create(strPostUrl);
        reqPost.Method = "POST";
        reqPost.KeepAlive = false
 
;
        reqPost.ContentType = "application/x-www-form-urlencoded";

        byte[] fileStream = AuthGetFileData(filePath);//把檔案轉為bute[]，看之前的部落格
        string strStream = Convert.ToBase64String(fileStream);
        byte[] strFiledata = Encoding.UTF8.GetBytes(strStream);
        reqPost.ContentLength 
 
= strFiledata.Length;
        //post資料
        using (Stream newStream = reqPost.GetRequestStream())
        {
            newStream.Write(strFiledata, 0, strFiledata.Length);
            //獲取返回
            HttpWebResponse myResponse = (HttpWebResponse)reqPost.GetResponse();
            using (StreamReader reader = new StreamReader(myResponse.GetResponseStream(), Encoding.UTF8))
            {
                //返回結果
                strReturn = reader.ReadToEnd();
            }
        }
        return strReturn;
    }