-1
我想用数据库中的值填充第二个下拉列表GetCity()
,这些值取决于第一个列表或GetCounty()
下拉列表中选择的内容。我在哪里添加where子句?人口与where条款的下拉列表
public class NewsModel : BaseModel
{
[Required]
public int? FKCountyId { get; set; }
public string County { get; set; }
[Required]
public int? FKCityId { get; set; }
public string City { get; set; }
public List<SelectListItem> GetCounty()
{
List<SelectListItem> lst = new List<SelectListItem>();
lst.Add(new SelectListItem() { Text = "Please select County", Value = "" });
foreach (var item in LambertonContext.NewsCounties)
{
lst.Add(new SelectListItem() { Text = item.County, Value = item.PKCountyId.ToString() });
}
return lst;
}
public List<SelectListItem> GetCity()
{
List<SelectListItem> lst = new List<SelectListItem>();
lst.Add(new SelectListItem() { Text = "Please select City", Value = "" });
foreach (var item in LambertonContext.NewsCities)
{
lst.Add(new SelectListItem() { Text = item.City, Value = item.PKCityId.ToString() });
}
return lst;
}
}
<div class="panel-body">
<div class="form-group">
@Html.LabelFor(m => m.FKCountyId, new { @class = "col-sm-2 col-sm-2 control-label" })
<div class="col-sm-10">
@Html.DropDownListFor(m => m.FKCountyId, Model.GetCounty())
</div>
</div>
<div class="form-group">
@Html.LabelFor(m => m.FKCityId, new { @class = "col-sm-2 col-sm-2 control-label" })
<div class="col-sm-10">
@Html.DropDownListFor(m => m.FKCityId, Model.GetCity())
</div>
</div>
阿兰多拉,我一定要回发GetCounty下拉菜单来获取在下拉列表中选择的价值? – user2224493
你不需要回传,你已经有FK关系。 您将需要一个AJAX调用来填充城市下拉列表 –
OK但LambertonContext.NewsCities.Where(FKCountyId == GetCounty()。Value)给我错误'System.Collections.Generic.List'不包含'Value'的定义,并且不能找到接受类型'System.Collections.Generic.List '的第一个参数的扩展方法'Value' (你是否缺少使用指令或程序集引用?) –
user2224493