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  • C# http下载文件

    /// <summary>
            /// http下载文件
            /// </summary>
            /// <param name="url">下载文件地址</param>
            /// <param name="path">文件存放地址,包含文件名</param>
            /// <returns></returns>
            public bool HttpDownload(string url, string path)
            {
                string tempPath = System.IO.Path.GetDirectoryName(path) + @"	emp";
                System.IO.Directory.CreateDirectory(tempPath);  //创建临时文件目录
                string tempFile = tempPath + @"" + System.IO.Path.GetFileName(path) + ".temp"; //临时文件
                if (System.IO.File.Exists(tempFile))
                {
                    System.IO.File.Delete(tempFile);    //存在则删除
                }
                try
                {
                    FileStream fs = new FileStream(tempFile, FileMode.Append, FileAccess.Write, FileShare.ReadWrite);
                    // 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(tempFile, FileMode.Create);
                    byte[] bArr = new byte[1024];
                    int size = responseStream.Read(bArr, 0, (int)bArr.Length);
                    while (size > 0)
                    {
                        //stream.Write(bArr, 0, size);
                        fs.Write(bArr, 0, size);
                        size = responseStream.Read(bArr, 0, (int)bArr.Length);
                    }
                    //stream.Close();
                    fs.Close();
                    responseStream.Close();
                    System.IO.File.Move(tempFile, path);
                    return true;
                }
                catch (Exception ex)
                {
                    return false;
                }
            }
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  • 原文地址:https://www.cnblogs.com/qq52117354/p/7699744.html
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