C#跨域请求

        //设置发送参数
        string sendParam = @"action=send&userid=2015&account=BRZH&password=151709&mobile=15212221391&content=您收到的验证码为：" + code + "【博瑞装潢】&sendTime=&extno=";

        //发送短信及获取返回参数
        string serviceAddress = "http://115.29.242.32:8888/sms.aspx";
        System.Net.WebClient wCient = new System.Net.WebClient();
        wCient.Headers.Add("Content-Type", "application/x-www-form-urlencoded");
        byte[] postData = Encoding.ASCII.GetBytes(sendParam);
        byte[] responseData = wCient.UploadData(serviceAddress, "POST", postData);
        string returnStr = Encoding.UTF8.GetString(responseData);//返回接受的数据 
        context.Response.Write(returnStr);

        $.ajax({
            type: "Post",
            url: "http://115.29.242.32:8888/sms.aspx",
            dataType:"jsonp",
            data: param,
            success: function (data) {
                alert(data);
            }
        });