C# HTTP下载文件

代码：

/// <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[];

    int size = responseStream.Read(bArr, , (int)bArr.Length);

    while (size > )

    {

        stream.Write(bArr, , size);

        size = responseStream.Read(bArr, , (int)bArr.Length);

    }

    stream.Close();

    responseStream.Close();

    return path;

}