Question

我在MVC控制器中具有按国家/地区ID获取城市的功能我有java脚本函数，在控制器中调用此方法

[HttpPost]
public ActionResult GetcitiesBycountry(string selectedValue)
{
List<string> cityList = new List<string>();
if (selectedValue != null && selectedValue.Length > 0)
{
using (InstructoroEntities dataContext = new InstructoroEntities())
{
int ID = int.Parse(selectedValue);
List<string> getcities = dataContext.Cities.Where(query => query.CountryID 
==ID).Select(q => q.CityName).ToList();
cityList = getcities;
}
}
return Json(new { CityList = cityList });
}


<script type="text/javascript">
$("#CountryID").change(function () {
var selectedValue = $(this).val();
$.ajax({
url: '@Url.Action("GetcitiesBycountry", "Registration")',
type: 'POST',
data: { "selectedValue": selectedValue },
dataType: 'json',
success: function (response) {
var items = "";
$.each(response.CityList, function (i, item) {
items += "<option value=\"" + item + "\">" + item + "</option>";
});
$("#CityName").html(items);
},
error: function (error) {
}

});
});
</script>

我只想获取城市ID和名称而不是名称最好的问候。

Answer 1

改变如下。

C＃：使用

var getcities = dataContext.Cities.Where(query => query.CountryID ==ID)
.Select(q => new{q.CityName, q.CityID}).ToList(); 
    }
}   
return Json(getcities);

而不是

List<string> getcities = dataContext.Cities.Where(query => query.CountryID 
==ID).Select(q => q.CityName).ToList();
cityList = getcities;
    }
}
return Json(new { CityList = cityList });

JQuery：使用

$.each(response, function (i, item) {
    items += "<option value=\"" + item.CityID + "\">" + item.CityName + "</option>";
});

而不是

$.each(response.CityList, function (i, item) {
    items += "<option value=\"" + item + "\">" + item + "</option>";
});

返回城市ID并命名为JSON MVC4

1 个答案: