Aspx Ajax 调用 C#函数处理数据

jquery ajax 调用后台函数

        var res;
        $.ajax({
            type: "POST",
            url: "fast_index_overview.aspx/GetOverViewZongLunContent",
            data: "{city:'" + regionCityName + "',time:'" + time + "'}",
            contentType: "application/json",
            dataType: "json",
            async: false,
            success: function (result) {
                try {
                    res = eval('(' + result.d + ')')[0];
                 
                } catch (e) {

                } 
            },
            error: function(err) {
                res = "错误：" + err.d;
            }
        });

        console.log("获取数据:" + res);