我有以下cshtml表单
@using (Html.BeginForm(Html.BeginForm("Create", "UserRole", Model, FormMethod.Post)))
{
@Html.AntiForgeryToken()
@Html.ValidationSummary(true)
<fieldset>
<legend>Role</legend>
<div class="editor-label">
@Html.Label(Model.User.UserName)
</div>
<div class="editor-field">
@Html.CheckBoxList(Model.CheckboxList)
</div>
<p>
<input type="submit" value="Create" />
</p>
</fieldset>
}
我希望在我的操作中选择Model.CheckboxList。
我的控制器中有以下创建操作
[HttpPost]
[ValidateAntiForgeryToken]
public ActionResult Create(UserRoleViewModel userRoleViewModel)
{
if (ModelState.IsValid)
{
//_context.Role.Add(role);
//_context.SaveChanges();
//return RedirectToAction("Index");
}
return View(viewModel);
}
但是viewModel.CheckboxList为0。
如何将复选框列表的选定值以及Model.User传递给Controller Action?
我的ViewModel如下所示: -
public User User { get; set; }
public IEnumerable<Role> RoleList { get; set; }
public List<UserRoleViewModel> UserList { get; set; }
public IEnumerable<SelectListItem> CheckboxList { get; set; }
public UserRoleViewModel()
{
}
public UserRoleViewModel(User user, IEnumerable<Role> roleList )
{
User = user;
RoleList = roleList;
}
感谢您的帮助和时间!
更新-----------阅读此帖enter link description here后,我尝试调整我的代码以遵循示例,但我仍然发现此更新代码存在问题。
现在我有以下内容: -
cshtml: -
@model IEnumerable<MvcMembership.ViewModels.RoleCheckboxListViewModel>
@using (Html.BeginForm())
{
@Html.EditorForModel()
<input type="submit" value="OK" />
}
浏览/角色/ EditorTemplates / RoleCheckboxListViewModel.cshtml
@model MvcMembership.ViewModels.RoleCheckboxListViewModel
@Html.HiddenFor(x => x.RoleId)
@Html.HiddenFor(x => x.RoleName)
<div>
@Html.CheckBoxFor(x => x.Checked)
@Html.LabelFor(x => x.Checked, Model.RoleName)
</div>
ViewModels: -
public class RoleCheckboxListViewModel
{
public string RoleId { get; set; }
public string RoleName { get; set; }
public bool Checked { get; set; }
}
并且控制器操作如下: -
public ActionResult Create(int? uid)
{
var checkBoxList = new[]
{
new RoleCheckboxListViewModel() {
RoleId = "1", Checked = true, RoleName = "item 1" },
new RoleCheckboxListViewModel() {
RoleId = "2", Checked = true, RoleName = "item 2" },
new RoleCheckboxListViewModel() {
RoleId = "3", Checked = true, RoleName = "item 3" },
};
return View(checkBoxList);
}
我现在遇到的问题是Create.cshtml。我看不到复选框列表,但只显示了123和OK按钮。
任何帮助都会非常感激,因为我现在处于死路。
答案 0 :(得分:6)
我用以下部分完成了这个:
1)子元素的视图模型,它添加了bool属性,该属性将表示是否在View中查看复选框...即:
public class CategoryViewModel
{
public int ID { get; set; }
public string Name { get; set; }
public bool Assigned { get; set; }
}
2)父元素的视图模型,它为这个新的子元素视图模型添加了一个集合属性,即:
public class ManufacturerViewModel
{
public Manufacturer Manufacturer { get; set; }
public IList<CategoryViewModel> Categories { get; set; }
public ManufacturerViewModel()
{
Categories = new List<CategoryViewModel>();
}
}
3)一种服务层方法,用于获取所有子元素的列表,同时还为每个子元素设置bool属性(在我的示例中为“Assigned”)。供您的控制器使用。
public IList<CategoryViewModel> GetCategoryAssignments(Manufacturer mfr)
{
var categories = new List<CategoryViewModel>();
foreach (var category in GetCategories())
{
categories.Add(new CategoryViewModel
{
ID = category.ID,
Name = category.Name,
Assigned = mfr.Categories.Select(c => c.ID).Contains(category.ID)
});
}
return categories;
}
4)根据您的复选框列表选择更新父项集合的方法。供您的控制器使用。
public void UpdateCategories(string[] selectedCategories, ManufacturerViewModel form)
{
if (selectedCategories == null)
selectedCategories = new string[] { };
var selectedIds = selectedCategories.Select(c => int.Parse(c)).ToList();
var assignedIds = form.Manufacturer.Categories.Select(c => c.ID).ToList();
foreach (var category in GetCategories())
{
if (selectedIds.Contains(category.ID))
{
if (!assignedIds.Contains(category.ID))
form.Manufacturer.Categories.Add(category);
}
else
{
if (assignedIds.Contains(category.ID))
form.Manufacturer.Categories.Remove(category);
}
}
}
5)修改“创建/编辑”视图。即:
@Html.EditorFor(model => model.Categories)
您还必须添加此项,以便原始分配的值包含在发布数据中。您必须为已通过验证设置为必需的每个属性添加HiddenFor。
for (int i = 0; i < Model.Manufacturer.Categories.Count; i++)
{
@Html.HiddenFor(model => model.Manufacturer.Categories[i].ID);
@Html.HiddenFor(model => model.Manufacturer.Categories[i].Name);
}
6)最后,为您的子视图模型元素创建一个新的EditorTemplate。即:
@model YourProject.ViewModels.CategoryViewModel
<li>
<input type="checkbox"
id="@string.Format("cb{0}{1}", @Model.Name, @Model.ID)"
name="selectedCategories" //Notice this name corresponds to string[] selectedCategories so that it can be extracted from the post data
value="@Model.ID"
@(Html.Raw(Model.Assigned ? "checked=\"checked\"" : "")) />
<label for="@string.Format("cb{0}{1}", @Model.Name, @Model.ID)">@Model.Name</label>
@Html.HiddenFor(model => model.ID)
</li>
希望我自己的应用程序能让您更好地了解如何解决此问题。
答案 1 :(得分:2)
将您选择的值存储到变量中,如下所示,并将其传递给隐藏字段,然后您可以轻松访问它
var modelSelected = document.getElementById("modelName");
document.getElementById('selectedModel').value =
modelSelected.options[modelSelected.selectedIndex].text;
<input id="selectedModel" name="selectedModel" type="hidden" runat="server" />