C# 使用自定义编辑器模板时未选择下拉列表值
我有一个用于下拉列表的简单自定义编辑器模板,其中显示了国家列表(国家名称、数字ID)。我通过ViewModel1将数字ID传递给视图,以便在下拉列表中已经选择了特定的国家/地区。即使模型包含CountryID,也不会选择国家id 使用选项3(参见模板代码),它确实预先选择了国家,但MVC更改了下拉列表的id和名称,例如-如果传递给编辑器模板的名称(属性名称)是“CountryID”,MVC会设置id=“*CountryID\u CountryID*”和name=“CountryID.CountryID”。当然,如果在视图模型属性名为just CountryID的情况下发布值,那么这会打乱绑定 问题:我需要在自定义编辑器模板代码中执行什么操作,以便在国家/地区列表下拉列表中预先选择国家/地区?传递给视图的模型包含国家的CountryID 编辑器模板代码:C# 使用自定义编辑器模板时未选择下拉列表值,c#,asp.net-mvc,templates,C#,Asp.net Mvc,Templates,我有一个用于下拉列表的简单自定义编辑器模板,其中显示了国家列表(国家名称、数字ID)。我通过ViewModel1将数字ID传递给视图,以便在下拉列表中已经选择了特定的国家/地区。即使模型包含CountryID,也不会选择国家id 使用选项3(参见模板代码),它确实预先选择了国家,但MVC更改了下拉列表的id和名称,例如-如果传递给编辑器模板的名称(属性名称)是“CountryID”,MVC会设置id=“*CountryID\u CountryID*”和name=“CountryID.Countr
@model short
@using PSP.Lib;
@{
SelectList TheSelectList = null;
string FieldName = ViewData.ModelMetadata.PropertyName; //FieldName only used when I tried the commented out option.
TheSelectList = DLists.GetCountriesList(); //just gets list of countries and a numeric id for each.
}
<div class="editor-label">
@Html.LabelFor(model => model)
</div>
<div class="editor-field">
@Html.DropDownList("", TheSelectList) //==1. country id passed thru model does not get selected on list.
@* @Html.DropDownListFor(model => model, TheSelectList) *@ //==2. as above, does not work.
@* @Html.DropDownList(FieldName, TheSelectList) *@ //==3. country id passed thru model DOES get selected BUT, id and name parameters get changed.
</div>
public static SelectList GetCountriesList()
{
AccDBEntities db = new AccDBEntities();
var ls = (from ct in db.Countries
select new { Text = ct.NameText, Value = ct.ID, Selected = false }).ToList();
return new SelectList(ls, "Value", "Text");
}
国家/地区列表:
@model short
@using PSP.Lib;
@{
SelectList TheSelectList = null;
string FieldName = ViewData.ModelMetadata.PropertyName; //FieldName only used when I tried the commented out option.
TheSelectList = DLists.GetCountriesList(); //just gets list of countries and a numeric id for each.
}
<div class="editor-label">
@Html.LabelFor(model => model)
</div>
<div class="editor-field">
@Html.DropDownList("", TheSelectList) //==1. country id passed thru model does not get selected on list.
@* @Html.DropDownListFor(model => model, TheSelectList) *@ //==2. as above, does not work.
@* @Html.DropDownList(FieldName, TheSelectList) *@ //==3. country id passed thru model DOES get selected BUT, id and name parameters get changed.
</div>
public static SelectList GetCountriesList()
{
AccDBEntities db = new AccDBEntities();
var ls = (from ct in db.Countries
select new { Text = ct.NameText, Value = ct.ID, Selected = false }).ToList();
return new SelectList(ls, "Value", "Text");
}
控制器:仅显示相关代码
@model PSP.ViewModels.ViewModel1
@using (Html.BeginForm()) {
@Html.AntiForgeryToken()
@Html.ValidationSummary(true)
<fieldset>
<legend>EventList</legend>
@Html.EditorFor(model => model.CountryID)
<p>
<input type="submit" value="Create" />
</p>
</fieldset>
namespace PSP.ViewModels
{
public class ViewModel1
{
public short CountryID { get; set; }
}
}
public ActionResult Create()
{
ViewModel1 VM1 = new ViewModel1();
VM1.CountryID = 50; //just pre-selecting a country id in the dropdown list
return View(VM1);
}
首先,您不应该创建一个静态方法来获取国家列表。将国家/地区列表添加到ViewModel,如下所示:
namespace PSP.ViewModels
{
public class ViewModel1 // Choose a more meaningful name for your ViewModel
{
public short CountryID { get; set; }
public IEnumerable<Country> CountriesList { get; set; }
}
}
而且,在您看来,您将拥有(您不需要EditorTemplate):
然后,创建一个如下所示的PartialView,将其命名为CountryID.cshtml
,并将其置于Views\Shared\EditorTemplates
下
@model short
<div class="editor-label">
@Html.LabelFor(model => model)
</div>
<div class="editor-field">
@Html.DropDownList("",
new SelectList(ViewBag.Countries, "ID", "NameText", Model)
</div>
@model short
@LabelFor(model=>model)
@Html.DropDownList(“,
新的选择列表(ViewBag.Countries,“ID”,“NameText”,型号)
在主视图中,您将拥有:
public ActionResult Create()
{
ViewModel1 VM1 = new ViewModel1();
VM1.CountryID = 50; //just pre-selecting a country id in the dropdown list
using(AccDBEntities db = new AccDBEntities())
{
VM1.CountriesList = (from ct in db.Countries
select ct).ToList();
}
return View(VM1);
}
@model PSP.ViewModels.ViewModel1
@using (Html.BeginForm()) {
@Html.AntiForgeryToken()
@Html.ValidationSummary(true)
<fieldset>
<legend>EventList</legend>
@Html.EditorFor(model => model.CountryID, Model.Countries)
<p>
<input type="submit" value="Create" />
</p>
</fieldset>
}
@model PSP.ViewModels.ViewModel1
@使用(Html.BeginForm()){
@Html.AntiForgeryToken()
@Html.ValidationSummary(true)
事件列表
@EditorFor(model=>model.CountryID,model.Countries)
}
你能发布DLists.GetCountriesList()的代码吗
和您的控制器操作?根据要求,我已发布了代码,谢谢。我想您完全错过了我的问题。上面的名称仅供参考,我的代码中有更好的名称,这不是我的问题。出于各种原因,我确实希望使用编辑器模板。我知道如何在没有它的情况下使其工作。您能告诉我如何创建编辑器模板吗编辑器模板工作吗?(这是我的问题)。