C# WebClient、 jsonp实现跨域

WebClient

无传输数据获取

            Uri uri = new Uri(allURL);
            WebClient wc = new WebClient();
            wc.Encoding = System.Text.Encoding.UTF8;
            var str = wc.DownloadString(uri.ToString());    

有传输数据获取

　　　　　　　var valuesout = new NameValueCollection();// 所加参数
            valuesout["data"] = data;
            valuesout["_aop_signature"] = _aop_signature;

            byte[] response;
            using (var client1 = new WebClient())
            {
                response = client1.UploadValues("路径", valuesout);
            }

            string str = System.Text.Encoding.UTF8.GetString(response);//解码  

WebRequest

　　/// <summary>
        /// 发送HTTP请求
        /// </summary>
        /// <param name="url">请求的URL</param>
        /// <param name="param">请求的参数</param>
        /// <returns>请求结果</returns>
        public static string request(string url, string param)
        {
            string strURL = url + '?' + param;
            System.Net.HttpWebRequest request;
            request = (System.Net.HttpWebRequest)WebRequest.Create(strURL);
            request.Method = "GET";
            // 添加header
            request.Headers.Add("apikey", "您自己的apikey");
            System.Net.HttpWebResponse response;
            response = (System.Net.HttpWebResponse)request.GetResponse();
            System.IO.Stream s;
            s = response.GetResponseStream();
            string StrDate = "";
            string strValue = "";
            StreamReader Reader = new StreamReader(s, Encoding.UTF8);
            while ((StrDate = Reader.ReadLine()) != null)
            {
                strValue += StrDate + "
";
            }
            return strValue;
        }

jQuery ajax jsonp

                $.ajax({
                    type: "get",
                    async: false,
                    //contentType: "application/json; charset=utf-8",
                    url: "http://bulabula.top/json.js",
                    dataType: "jsonp", //数据类型为jsonp  
                    jsonp:"callback",
                    jsonpCallback:"callBackFun", //服务端用于接收callback调用的function名的参数
                    success: function(data) {
                        console.log(data);
                    },
                    error: function(a,b,c) {
                        console.log(a);console.log(b);
                        console.log(c);
                    }
                });