/// <summary> /// Http下载文件 /// </summary> public static string HttpDownloadFile(string url, string path) {     // 设置参数     HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;     //发送请求并获取相应回应数据     HttpWebResponse response = request.GetResponse() as HttpWebResponse;     //直到request.GetResponse()程序才开始向目标网页发送Post请求     Stream responseStream = response.GetResponseStream();     //创建本地文件写入流     Stream stream = new FileStream(path, FileMode.Create);     byte[] bArr = new byte[1024];     int size = responseStream.Read(bArr, 0, (int)bArr.Length);     while (size > 0)     {         stream.Write(bArr, 0, size);         size = responseStream.Read(bArr, 0, (int)bArr.Length);     }     stream.Close();     responseStream.Close();     return path; }