c# 关键字变量

　　

/// <summary>
/// 请求网易云音乐接口
/// </summary>
/// <typeparam name="T">要请求的接口类型</typeparam>
/// <param name="config">要请求的接口类型的对象</param>
/// <returns>请求结果(JSON)</returns>
public static string Request<T>(T config) where T : RequestData, new()
{
    // 请求URL
    string requestURL = config.Url;
    // 将数据包对象转换成QueryString形式的字符串
    string @params = config.FormData.ParseQueryString();
    bool isPost = config.Method.Equals("post", StringComparison.CurrentCultureIgnoreCase);

    if (!isPost)
    {
        // get方式 拼接请求url
        string sep = requestURL.Contains('?') ? "&" : "?";
        requestURL += sep + @params;
    }

    HttpWebRequest req = (HttpWebRequest)WebRequest.Create(requestURL);
    req.Accept = "*/*";
    req.Headers.Add("Accept-Language", "zh-CN,zh;q=0.8,gl;q=0.6,zh-TW;q=0.4");
    // 如果服务端启用了GZIP，那么下面必须解压，否则一直乱码。
    // 参见：http://www.crifan.com/set_accept_encoding_header_to_gzip_deflate_return_messy_code/
    req.Headers.Add("Accept-Encoding", "gzip,deflate,sdch");
    req.ContentType = "application/x-www-form-urlencoded";
    req.KeepAlive = true;
    req.Host = "music.163.com";
    req.Referer = "http://music.163.com/search/";
    req.UserAgent = "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.152 Safari/537";            
    // 设置cookies
    req.Headers["Cookie"] = "appver=1.5.2";
    req.Method = config.Method;
    req.AutomaticDecompression = DecompressionMethods.GZip;
    if (isPost)
    {
        // 写入post请求包
        byte[] formData = Encoding.UTF8.GetBytes(@params);
        // 设置HTTP请求头  参考：https://github.com/darknessomi/musicbox/blob/master/NEMbox/api.py          
        req.GetRequestStream().Write(formData, 0, formData.Length);
    }            
    // 发送http请求 并读取响应内容返回
    return new StreamReader(req.GetResponse().GetResponseStream(), Encoding.GetEncoding("UTF-8")).ReadToEnd();
}

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前加@

 

/// <summary>
/// 请求网易云音乐接口
/// </summary>
/// <typeparam name="T">要请求的接口类型</typeparam>
/// <param name="config">要请求的接口类型的对象</param>
/// <returns>请求结果(JSON)</returns>
public static string Request<T>(T config) where T : RequestData, new()
{
    // 请求URL
    string requestURL = config.Url;
    // 将数据包对象转换成QueryString形式的字符串
    string @params = config.FormData.ParseQueryString();
    bool isPost = config.Method.Equals("post", StringComparison.CurrentCultureIgnoreCase);

    if (!isPost)
    {
        // get方式 拼接请求url
        string sep = requestURL.Contains('?') ? "&" : "?";
        requestURL += sep + @params;
    }

    HttpWebRequest req = (HttpWebRequest)WebRequest.Create(requestURL);
    req.Accept = "*/*";
    req.Headers.Add("Accept-Language", "zh-CN,zh;q=0.8,gl;q=0.6,zh-TW;q=0.4");
    // 如果服务端启用了GZIP，那么下面必须解压，否则一直乱码。
    // 参见：http://www.crifan.com/set_accept_encoding_header_to_gzip_deflate_return_messy_code/
    req.Headers.Add("Accept-Encoding", "gzip,deflate,sdch");
    req.ContentType = "application/x-www-form-urlencoded";
    req.KeepAlive = true;
    req.Host = "music.163.com";
    req.Referer = "http://music.163.com/search/";
    req.UserAgent = "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.152 Safari/537";            
    // 设置cookies
    req.Headers["Cookie"] = "appver=1.5.2";
    req.Method = config.Method;
    req.AutomaticDecompression = DecompressionMethods.GZip;
    if (isPost)
    {
        // 写入post请求包
        byte[] formData = Encoding.UTF8.GetBytes(@params);
        // 设置HTTP请求头  参考：https://github.com/darknessomi/musicbox/blob/master/NEMbox/api.py          
        req.GetRequestStream().Write(formData, 0, formData.Length);
    }            
    // 发送http请求 并读取响应内容返回
    return new StreamReader(req.GetResponse().GetResponseStream(), Encoding.GetEncoding("UTF-8")).ReadToEnd();
}