ashx 文件与js文件数据交互

浏览数：29 / 时间：2015年06月09日

//js代码
//城市下拉列表
            $("#selPro").change(function() {
                var option = "";
                $.ajax({
                    type: "post",
                    url: "homeHandler/HomeProvince.ashx",
                    dataType: "json",
                    data: "proStr=" + $("#selPro").val(),
                    success: function(message) {
                        if (message != null) {
                            $("#selCity option").remove();
                            option += "<option value=\"0\">==请选择==</option>";
                            $.each(message.city, function(i, item) {
                                option += "<option value=\"" + item.id + "\">" + item.name + "</option>";
                            });
                        }
                        $("#selCity").append(option);
                    }
 
                });
 
            });
 
 
//　　c#代码
 public void ProcessRequest(HttpContext context)
    {
 
        //得到城市Id
        int proId = Convert.ToInt32(context.Request.Params["proStr"]);
        if (proId != 0)
        {
            //根据城市Id查询城市下的区县
            List<City> listCity = CityManager.GetAllByProId(proId);
            int i = 0;
 
            StringBuilder strJSON = new StringBuilder();
            strJSON.Append("{\"city\":[");
            foreach (City city in listCity)
            {
                if (i < (listCity.Count - 1))
                {
                    strJSON.Append("{");
                    strJSON.Append("\"id\":");
                    strJSON.Append(Convert.ToInt32(city.CityId));
                    strJSON.Append(",");
                    strJSON.Append("\"name\":\"");
                    strJSON.Append(city.CityName);
                    strJSON.Append("\"},");
                }
                if (i == (listCity.Count - 1))
                {
                    strJSON.Append("{");
                    strJSON.Append("\"id\":");
                    strJSON.Append(Convert.ToInt32(city.CityId));
                    strJSON.Append(",");
                    strJSON.Append("\"name\":\"");
                    strJSON.Append(city.CityName);
                    strJSON.Append("\"}");
                }
                i++;
            }
            
            strJSON.Append("]}");
            context.Response.Write(strJSON.ToString());
 
 
        }
    }
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