C# Http下载指定文件存储到特定目录，下面是标准用法代码：
- ///
- /// Http下载文件：下载指定文件存储到特定目录
- ///
- public static string HttpDownloadFile(string remoteUrl)
- {
- // 设置参数
- HttpWebRequest request = WebRequest.Create(remoteUrl) 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();
-
- string localPath = AppDomain.CurrentDomain.BaseDirectory + @"QRCode\MyQRCode.jpg";
- //创建本地文件写入流
- Stream stream = new FileStream(localPath, 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 localPath;
- }
remoteUrl值说明：
remoteUrl的值举例
上面的URL值放到浏览器是可以直接打开文件的：
运行效果：
