Link 在部分 Razor 页面中触发了错误的 OnGet

Link in partial Razor Page fires wrong OnGet

我正在使用 razor 页面来显示 ItemT 模型,并在底部插入了一个部分视图以显示所有属性(未在 n:m 关系中分配给该模型)。

PageModel 'FreePropertiesToItemT' 有两个 public 属性:

public ItemT ItemT { get; set; }  // the one Item to show
public IList<PropertyIndexViewModel> FreeProperties { get; set; } // all free properties

调用了一个 OnGetAsync(int? id) 方法,效果很好。该页面正确显示所有数据。

视图为每个 属性:

显示一个 link
<a asp-page-handler="addProperty" asp-route-id="@item.PropertyID">add</a>

这将创建 link:

<a href="/Inventory/ItemTs/FreePropertiesToItemT?id=1&amp;handler=addProperty">add</a>

这是正确的link(我认为)。路由、id 值和处理程序是正确的,因为 PageModel 中有第二个 OnGet 方法:

public async Task<IActionResult> OnGetaddPropertyAsync(int? id)

但是,link 每次只调用 OnGetAsync(而不是 OnGetaddProppertyAsync),当然,每次 属性! 我错过了什么?

ItemT 型号:

public class ItemT
{
    [Key]
    public int ItemTID { get; set; }

    [Required]
    [StringLength(100, MinimumLength = 1)]
    [Display(Name = "ItemT")]
    public string Title { get; set; }
    public bool isActive { get; set; } = true;
    public virtual ICollection<ItemTProperty> ItemTProperties { get; set; }
}

自由属性的ViewModel:

public class PropertyIndexViewModel
{
    [Key]
    public int PropertyID { get; set; }

    [Required]
    [StringLength(100, MinimumLength = 1)]
    public string Title { get; set; }
    public bool DefaultsOnly { get; set; }

    [Display(Name = "Unit")]
    public string Unit { get; set; }

    [Display(Name = "Valuetype")]
    public string Valuetype { get; set; }
}

要列出一项的页面 T:

@page
@model Inventory.Areas.Inventory.Pages.ItemTs.FreePropertiesToItemTModel

@{
    ViewData["Title"] = "FreePropertiesToItemT";
}

<h1>Free Properties</h1>

<div>
    <h4>ItemT</h4>
    <hr />
    <dl class="row">
        <dt class="col-sm-2">
            @Html.DisplayNameFor(model => model.ItemT.Title)
        </dt>
        <dd class="col-sm-10">
            @Html.DisplayFor(model => model.ItemT.Title)
        </dd>
        <dt class="col-sm-2">
            @Html.DisplayNameFor(model => model.ItemT.isActive)
        </dt>
        <dd class="col-sm-10">
            @Html.DisplayFor(model => model.ItemT.isActive)
        </dd>
    </dl>
</div>
<div>
    <a asp-page="./Edit" asp-route-id="@Model.ItemT.ItemTID">Edit</a> |
    <a asp-page="./Index">Back to List</a>
</div>
<p></p>

<div>
    @{
        ViewData["FreeProperties"] = true;
    }
    <partial name="../Properties/_Properties.cshtml" model="Model.FreeProperties" />
</div>

加载的部分:

@using Inventory.DAL.ViewModels
@model IList<PropertyIndexViewModel>

<table class="table">
    <thead>
        <tr>
            <th>
                @Html.DisplayNameFor(model => model[0].Title)
            </th>
            <th>
                @Html.DisplayNameFor(model => model[0].DefaultsOnly)
            </th>
            <th>
                @Html.DisplayNameFor(model => model[0].Unit)
            </th>
            <th>
                @Html.DisplayNameFor(model => model[0].Valuetype)
            </th>
            <th></th>
        </tr>
    </thead>
    <tbody>
        @foreach (var item in Model)
        {
            <tr>
                <td>
                    @Html.DisplayFor(modelItem => item.Title)
                </td>
                <td>
                    @Html.DisplayFor(modelItem => item.DefaultsOnly)
                </td>
                <td>
                    @Html.DisplayFor(modelItem => item.Unit)
                </td>
                <td>
                    @Html.DisplayFor(modelItem => item.Valuetype)
                </td>
                <td>
                    @if (ViewBag.FreeProperties != null)
                    {
                    <a asp-page-handler="addProperty" asp-route-id="@item.PropertyID">add</a>
                    }
                </td>
            </tr>
        }
    </tbody>
</table>

页面后面的c#代码:

namespace Inventory.Areas.Inventory.Pages.ItemTs
{
    public class FreePropertiesToItemTModel : PageModel
    {
        private readonly IUnitOfWork _uow;

        public FreePropertiesToItemTModel(IUnitOfWork uow)
        {
            _uow = uow;
        }

        public ItemT ItemT { get; set; }
        public IList<PropertyIndexViewModel> FreeProperties { get; set; }

        public async Task<IActionResult> OnGetAsync(int? id)
        {
            if (id == null)
            {
                return NotFound();
            }

            ItemT = await _uow.ItemTRepo.getById((int)id);

            if (ItemT == null)
            {
                return NotFound();
            }            
            FreeProperties = await _uow.PropertyRepo.getFreePropertiesForItemT((int)id);

            return Page();
        }

        public async Task<IActionResult> OnGetaddPropertyAsync(int? id)
        {
            if( id == null)
            {
                return NotFound();
            }
            if(ItemT == null) { return NotFound(); }
            await _uow.ItemTRepo.addProperty(ItemT.ItemTID, (int)id);
            await _uow.Commit();
            return Page();
        }
    }
}

问题是你的handler名称错误,修改如下:

public async Task<IActionResult> OnGetAddPropertyAsync(int? id)

处理程序名称的第一个字母必须大写,否则 url 中的 handler=addProperty 将被视为查询字符串参数而不是处理程序名称。