[HttpPost]
        public ActionResult GetWeather()
        {
            HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create("http://api.map.baidu.com/telematics/v3/weather?location=厦门&output=json&ak=5slgyqGDENN7Sy7pw29IUvrZ");
            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            Stream Strstream = response.GetResponseStream();
            StreamReader sr = new StreamReader(Strstream);
            return Content(sr.ReadToEnd());
        }

<input type="button" value="获取天气" id="btnOk" />
<div id="divCity" style="display: none">
    <span>城市:</span>【<span id="txtCity"></span>】</div>
<div id="divWeather">
</div>
<script src="../../Scripts/jquery-1.4.4.min.js" type="text/javascript"></script>
<script type="text/javascript">
    $(function () {
        $("#btnOk").click(function () {
            $.post("Home/GetWeather", {}, function (data, status) {
                if (status == "success") {

                    var jsonData = $.parseJSON(data);
                    if (jsonData.status == "success");
                    {
                        var jsonResult = jsonData.results;
                        var strreslut = " <table ><tr> <th> 日期 </th><th>白天</th><th>夜间</th><th>天气</th><th>风</th><th> 气温</th>  </tr>";
                        $.each(jsonResult[0].weather_data, function (index, item) {
                            strreslut += "<tr><td>" + item.date + "</td><td><img src=‘" + item.dayPictureUrl + "‘/></td><td><img src=‘" + item.nightPictureUrl + "‘/></td><td>" + item.weather + "</td><td>" + item.wind + "</td><td>" + item.temperature + "</td></tr>";

                        });
                        strreslut += "</table>";
                        $("#divWeather").html("");
                        $("#divCity").css("display", "");
                        $("#txtCity").html(jsonResult[0].currentCity);
                        $("#divWeather").append(strreslut);
                    }

                }
                else {
                    alert("ajax请求失败！");
                }
            });
        });
    });
</script>