在 MVC 中,一个 Edit HttpPost 正在工作,另一个则不工作。我缺少什么?
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25-09-2019 - |
题
谷歌搜索一般和 SO 还没有帮助我,所以:
我正在从头开始构建我的第一个 MVC 应用程序,按照 MVC 音乐商店示例 而是构建一个小应用程序,可以在其中创建竞技场战士并让它们互相战斗。(Fighters
和 Fight
已通过 EF 链接到基础表)。
我有两个控制器 Fighters
和 Fights
. 。编辑 Actionresult
为了 Fights
正在工作,但是对于 Fighters
它不是。当我点击按钮保存更改时,我返回到关联的索引页面,但尚未提交任何更改。这是我的问题:为什么会失败?
从 兵营控制器, ,带有错误的非更新 HttpPost Edit(应该被命名为 FighterController,但没关系):
//
// GET: /Barracks/Edit
public ActionResult Edit(int id)
{
ViewData.Model = _FightDb.Fighters.Single(f => f.Id == id);
return View();
}
//
// POST: /Barracks/Edit
[HttpPost]
public ActionResult Edit(int id, FormCollection collection)
{
var fighter = _FightDb.Fighters.Single(f => f.Id == id);
try
{
UpdateModel(fighter, "Fighter");
var x = ViewData.GetModelStateErrors();
_FightDb.SaveChanges();
return RedirectToAction("Index");
}
catch
{
var viewModel = fighter;
return View(viewModel);
}
}
(如你所见,我已经包括了 这个问题中的 GetModelStateErrors 技巧, ,但 x 的结果是 null
)
这是可以工作的控制器,FightController:
//
// GET: /Fights/Edit
public ActionResult Edit(int id)
{
var viewModel = new FightDetailsViewModel
{
Fight = _FightDb.Fights.Single(f => f.ID == id),
Fighters = _FightDb.Fighters.ToList()
};
return View(viewModel);
}
//
// POST: /Fights/Edit
[HttpPost]
public ActionResult Edit(int id, FormCollection collection)
{
var fight = _FightDb.Fights.Single(f => f.ID == id);
try
{
UpdateModel(fight, "Fight");
_FightDb.SaveChanges();
return RedirectToAction("Index");
}
catch
{
var viewModel = new FightDetailsViewModel
{
Fight = _FightDb.Fights.Single(f => f.ID == id),
Fighters = _FightDb.Fighters.ToList()
};
return View(viewModel);
}
}
这是战士的 edit.aspx: (评论后编辑)
<%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage<Mvc3_EF_BW_Fight.Models.Fighter>" %>
<asp:Content ID="Content1" ContentPlaceHolderID="cphMain" runat="server">
<h2>Edit</h2>
<%: Html.EditorForModel() %>
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="head" runat="server">
</asp:Content>
它在共享中使用以下 Fighter.ascx:
<%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<Mvc3_EF_BW_Fight.Models.Fighter>" %>
<% using (Html.BeginForm())
{%>
<%: Html.ValidationSummary(true) %>
<fieldset>
<legend>Fighter</legend>
<div class="editor-label">
<%: Html.LabelFor(model => model.Id) %>
</div>
<div class="editor-field">
<%: Html.TextBoxFor(model => model.Id) %>
<%: Html.ValidationMessageFor(model => model.Id) %>
</div>
<div class="editor-label">
<%: Html.LabelFor(model => model.FighterName) %>
</div>
<div class="editor-field">
<%: Html.TextBoxFor(model => model.FighterName) %>
<%: Html.ValidationMessageFor(model => model.FighterName) %>
</div>
<div class="editor-label">
<%: Html.LabelFor(model => model.FighterStyleDescription) %>
</div>
<div class="editor-field">
<%: Html.TextBoxFor(model => model.FighterStyleDescription) %>
<%: Html.ValidationMessageFor(model => model.FighterStyleDescription) %>
</div>
<div class="editor-label">
<%: Html.LabelFor(model => model.FighterLongDescription) %>
</div>
<div class="editor-field">
<%: Html.TextAreaFor(model => model.FighterLongDescription) %>
<%: Html.ValidationMessageFor(model => model.FighterLongDescription) %>
</div>
<p>
<input type="submit" value="Save" />
</p>
</fieldset>
<% } %>
这是战斗的 edit.aspx
<%@ Page Title="" Language="C#" MasterPageFile="~/Views/Shared/Site.Master" Inherits="System.Web.Mvc.ViewPage<Mvc3_EF_BW_Fight.ViewModels.FightDetailsViewModel>" %>
<asp:Content ID="Content1" ContentPlaceHolderID="cphMain" runat="server">
<h2>Edit</h2>
<%: Html.EditorFor(model => model.Fight, new { Fighters = Model.Fighters })%>
</asp:Content>
<asp:Content ID="Content2" ContentPlaceHolderID="head" runat="server">
</asp:Content>
这是 Fight.ascx:
<%@ Control Language="C#" Inherits="System.Web.Mvc.ViewUserControl<Mvc3_EF_BW_Fight.Models.Fight>" %>
<% using (Html.BeginForm())
{%>
<%: Html.ValidationSummary(true) %>
<fieldset>
<legend>Fields</legend>
<div class="editor-label">
<%: Html.LabelFor(model => model.ID) %>
</div>
<div class="editor-field">
<%: Html.TextBoxFor(model => model.ID) %>
<%: Html.ValidationMessageFor(model => model.ID) %>
</div>
<div class="editor-label">
<%: Html.LabelFor(model => model.FightName) %>
</div>
<div class="editor-field">
<%: Html.TextBoxFor(model => model.FightName) %>
<%: Html.ValidationMessageFor(model => model.FightName) %>
</div>
<div class="editor-label">
<%: Html.LabelFor(model => model.Fighter1ID) %><br />
<%: Html.LabelFor(model => model.Fighter1Reference.Value.FighterName)%>
</div>
<div class="editor-field">
<%: Html.DropDownList("Fighter1ID", new SelectList(ViewData["Fighters"] as IEnumerable, "ID", "FighterName", Model.Fighter1ID))%>
<%: Html.ValidationMessageFor(model => model.Fighter1ID) %>
</div>
<div class="editor-label">
<%: Html.LabelFor(model => model.Fighter2ID) %>
</div>
<div class="editor-field">
<%: Html.DropDownList("Fighter1ID", new SelectList(ViewData["Fighters"] as IEnumerable, "ID", "FighterName", Model.Fighter1ID))%>
<%: Html.ValidationMessageFor(model => model.Fighter2ID) %>
</div>
<div class="editor-label">
<%: Html.LabelFor(model => model.Fighter1Login) %>
</div>
<div class="editor-field">
<%: Html.TextBoxFor(model => model.Fighter1Login) %>
<%: Html.ValidationMessageFor(model => model.Fighter1Login) %>
</div>
<div class="editor-label">
<%: Html.LabelFor(model => model.Fighter2Login) %>
</div>
<div class="editor-field">
<%: Html.TextBoxFor(model => model.Fighter2Login) %>
<%: Html.ValidationMessageFor(model => model.Fighter2Login) %>
</div>
<div class="editor-label">
<%: Html.LabelFor(model => model.FightStatusID) %>
</div>
<div class="editor-field">
<%: Html.TextBoxFor(model => model.FightStatusID) %>
<%: Html.ValidationMessageFor(model => model.FightStatusID) %>
</div>
<p>
<input type="submit" value="Save" />
</p>
</fieldset>
<% } %>
这是我的战斗视图模型:
public class FightDetailsViewModel
{
public Fight Fight { get; set; }
public List<Fighter> Fighters { get; set; }
}
战斗机没有 ViewModel(无论如何,这个场景中都没有涉及)。
我可以发布您希望看到的任何代码。
编辑:我看过 将 ViewModel 模式与 MVC 2 强类型 HTML 帮助程序结合使用 和 ASP.NET MVC 2 UpdateModel() 不更新内存或数据库中的值 ,但我还没有看到解决方案。
解决方案
而不是这个 UpdateModel(fighter, "Fighter");
尝试像这样调用 updte 模型 UpdateModel(fighter);
. 。两种编辑之间的区别在于,如果是战斗机,您的模型直接是战斗机,因此您不需要名称,而如果是战斗,您可以调用模型的编辑器。战斗,因此您需要名称。另请参阅这个问题: asp.net mvc2 - 如何在控制器中以相同的方式获取 model 和 model.something ?