与ASP MVC + Html.DropDownList）使用模型视图模式问题（ [英] problems with ASP MVC + Html.DropDownList() using a ModelView Pattern
问题描述
最近，我发布了关于HTML帮助DropDownList的问题，并得到它的工作（<一个href=\"http://stackoverflow.com/questions/1037337/retrieving-data-from-html-dropdownlist-in-controller-asp-mvc-string-returne\">here).但现在我已经决定这是很多聪明切换到模型视图模式，所以我必须查看在强类型在我的意见等。我所做的就是我在通过以下方式等话题做了一些调整，code方法：
VacatureFormViewModel：
公共类VacaturesFormViewModel
{
公共Vacatures Vacature {搞定;私人集; }
公众的SelectList EducationLevels {搞定;私人集; }
公众的SelectList分行{搞定;私人集; }
公众的SelectList CareerLevels {搞定;私人集; } 资源库资源库; //构造
公共VacaturesFormViewModel（Vacatures vacature）
{
this.Vacature = vacature;
this.repository =新的存储库（）;
this.EducationLevels =新的SelectList（repository.GetAllEducationLevels（），ID，姓名，vacature.EducationLevels）;
this.Branches =新的SelectList（repository.GetAllBranches（），ID，姓名，vacature.Branches）;
this.CareerLevels =新的SelectList（repository.GetAllCareerLevels（），ID，姓名，vacature.CareerLevels）; }
}
BanenController：
//
// GET：/ Banen /创建 公众的ActionResult的Create（）
{
Vacatures vacature =新Vacatures（）;
返回查看（新VacaturesFormViewModel（vacature））;
} //
// POST：/ Banen /创建 的[AcceptVerbs（HttpVerbs.Post）
公众的ActionResult创建（Vacatures vacatureToAdd）
{
如果（ModelState.IsValid）
{
尝试
{
// TODO：添加插入逻辑这里
repository.AddToVacatures（vacatureToAdd）;
repository.SaveChanges（）; //返回如果成功的上市页
返回RedirectToAction（「指数」）;
}
赶上（例外五）
{
返回查看（）;
}
}
}
和我Create.aspx视图（它的一部分）：
＆LT;使用％（Html.BeginForm（））{％GT; ＆LT;＆字段集GT;
＆LT;传奇＆GT;＆领域LT; /传说＆GT;
＆所述p为H.;
＆LT;标签=标题＆GT;标题：LT; /标签＆gt;
＆LT;％= Html.TextBox（标题，Model.Vacature.Title）％GT;
＆LT;％= Html.ValidationMessage（标题，*）％GT;
＆所述; / P＆GT;
＆所述p为H.;
＆LT;标签=内容＆gt;内容：LT; /标签＆gt;
＆LT;％= Html.TextArea（内容，Model.Vacature.Content）％GT;
＆所述;％= Html.ValidationMessage（内容，*）％＆GT;
＆所述; / P＆GT;
＆所述p为H.;
＆LT;标签=EducationLevels＆GT; EducationLevels：LT; /标签＆gt;
＆所述;％= Html.DropDownList（EducationLevels，Model.EducationLevels）％GT;
＆所述;％= Html.ValidationMessage（EducationLevels，*）％＆GT;
＆所述; / P＆GT;
＆所述p为H.;
＆LT;标签=CareerLevels＆GT; CareerLevels：LT; /标签＆gt;
＆所述;％= Html.DropDownList（CareerLevels，Model.CareerLevels）％GT;
＆所述;％= Html.ValidationMessage（CareerLevels，*）％＆GT;
＆所述; / P＆GT;
＆所述p为H.;
＆LT;标签=分行＆GT;分行：其中; /标签＆gt;
＆LT;％= Html.DropDownList（分支，Model.Branches）％GT;
＆LT;％= Html.ValidationMessage（分行，*）％GT;
＆所述; / P＆GT;
＆所述p为H.;
＆LT;输入类型=提交值=保存/＆GT;
＆所述; / P＆GT;
＆LT; /字段集＆GT;
＆LT;％}％GT;
有关指导我已经ScottGu\">的NerdDinner <使用的NerdDinner教程的按ScottGu的教程，我看过这里的各种话题。
我的问题是，如果有可能让MVC ASP设置我careerlevel，educationlevel和领域（dropdownl
编辑使用GUID：
使用dropdownlists我使用略有不同的方法。这也许可以让您的视图模型的工作，但对我来说很容易通过这种方式：
公共类VacaturesFormViewModel
{ 公共IEnumerable的＆LT; SelectListItem＆GT; EducationLevels {搞定;组; }
公众的Guid EducationLevelID {搞定;组; }}
该EducationLevelID将有你的下拉的选择ID。
这是视图：
＆LT;％= Html.DropDownList（EducationLevelID，Model.EducationLevels）％GT;
控制器
的IEnumerable＆LT; SelectListItem＆GT; educationLevelList =
从GetLevelList水平（）
选择新SelectListItem
{
文本=水平.name和
值= level.Uid.ToString（）
};
model.EducationLevels = educationLevelList;
Recently I posted a question about the html helper dropdownlist and got it working (here). But now I have decided it was alot smarter to switch to ModelView Patterns so I have acces to strongly typed methods in my views etc. What I did was I made some adjustments to the code in my other topic in the following way:
VacatureFormViewModel:
public class VacaturesFormViewModel
{
public Vacatures Vacature { get; private set; }
public SelectList EducationLevels { get; private set; }
public SelectList Branches { get; private set; }
public SelectList CareerLevels { get; private set; }
Repository repository;
// Constructor
public VacaturesFormViewModel(Vacatures vacature)
{
this.Vacature = vacature;
this.repository = new Repository();
this.EducationLevels = new SelectList(repository.GetAllEducationLevels(),"ID","Name",vacature.EducationLevels);
this.Branches = new SelectList(repository.GetAllBranches(),"ID","Name",vacature.Branches);
this.CareerLevels = new SelectList(repository.GetAllCareerLevels(), "ID", "Name", vacature.CareerLevels);
}
}
BanenController:
//
// GET: /Banen/Create
public ActionResult Create()
{
Vacatures vacature = new Vacatures();
return View(new VacaturesFormViewModel(vacature));
}
//
// POST: /Banen/Create
[AcceptVerbs(HttpVerbs.Post)]
public ActionResult Create(Vacatures vacatureToAdd)
{
if (ModelState.IsValid)
{
try
{
// TODO: Add insert logic here
repository.AddToVacatures(vacatureToAdd);
repository.SaveChanges();
// Return to listing page if succesful
return RedirectToAction("Index");
}
catch (Exception e)
{
return View();
}
}
}
And my Create.aspx view (part of it):
<% using (Html.BeginForm()) {%>
<fieldset>
<legend>Fields</legend>
<p>
<label for="Title">Title:</label>
<%= Html.TextBox("Title", Model.Vacature.Title) %>
<%= Html.ValidationMessage("Title", "*") %>
</p>
<p>
<label for="Content">Content:</label>
<%= Html.TextArea("Content", Model.Vacature.Content) %>
<%= Html.ValidationMessage("Content", "*") %>
</p>
<p>
<label for="EducationLevels">EducationLevels:</label>
<%= Html.DropDownList("EducationLevels", Model.EducationLevels)%>
<%= Html.ValidationMessage("EducationLevels", "*") %>
</p>
<p>
<label for="CareerLevels">CareerLevels:</label>
<%= Html.DropDownList("CareerLevels", Model.CareerLevels)%>
<%= Html.ValidationMessage("CareerLevels", "*")%>
</p>
<p>
<label for="Branches">Branches:</label>
<%= Html.DropDownList("Branches", Model.Branches)%>
<%= Html.ValidationMessage("Branches", "*")%>
</p>
<p>
<input type="submit" value="Save" />
</p>
</fieldset>
<% } %>
For guiding I have used the NerdDinner tutorial by ScottGu and I have read various topics here.
My question is if it is possible to let MVC ASP set my careerlevel, educationlevel and branche (dropdownl
Edited to use Guid:
With dropdownlists I use a slightly different approach. It might be possible to get your viewmodel working, but for me it is easier this way:
public class VacaturesFormViewModel
{
public IEnumerable<SelectListItem>EducationLevels{ get; set; }
public Guid EducationLevelID{ get; set; }
}
The EducationLevelID will have the selected id of your Dropdown. This is the view:
<%= Html.DropDownList("EducationLevelID", Model.EducationLevels)%>
Controller
IEnumerable<SelectListItem> educationLevelList =
from level in GetLevelList()
select new SelectListItem
{
Text = level .Name,
Value = level.Uid.ToString()
};
model.EducationLevels = educationLevelList ;
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