ASP.NETMVC部分在傳遞屬性時不系結-有解無憂

我已經離開 ASP.NET MVC 一段時間了，所以忘記了一些基礎知識。

我已經搜索了一個答案，但似乎沒有一個真正適用/作業，所以這似乎是一個重復的問題，但事實并非如此，也許我只是看不到樹林中的木頭。我知道我遺漏了一些明顯的東西，但不記得是什么

我有一個部分，我將模型傳遞給它更新模型（AddressDetails& ContactDetails）上的屬性。

主頁

<form asp-action="Create">
        <div asp-validation-summary="ModelOnly" class="text-danger"></div>
        <div class="form-group">
            <label asp-for="Name" class="control-label"></label>
            <input asp-for="Name" class="form-control" />
            <span asp-validation-for="Name" class="text-danger"></span>
        </div
        @await Html.PartialAsync("../AddressDetails/Create.cshtml", Model)
        @await Html.PartialAsync("../ContactDetails/Create.cshtml", Model)
        <div class="form-group">
            <input type="submit" value="Create" class="btn btn-primary" />
        </div>
</form>

和部分頁面

@model CareHome.Models.CareHomes
<div class="form-group">
    <h4>AddressDetails</h4>
    <hr />
</div>

<div asp-validation-summary="ModelOnly" class="text-danger"></div>
<div class="form-group">
    <label asp-for="AddressDetails.NumberStreetName" class="control-label"></label>
    <input asp-for="AddressDetails.NumberStreetName" class="form-control" />
    <span asp-validation-for="AddressDetails.NumberStreetName" class="text-danger"></span>
</div>
<div class="form-group">
    <label asp-for="AddressDetails.Locality" class="control-label"></label>
    <input asp-for="AddressDetails.Locality" class="form-control" />
    <span asp-validation-for="AddressDetails.Locality" class="text-danger"></span>
</div>
<div class="form-group">
    <label asp-for="AddressDetails.Town" class="control-label"></label>
    <input asp-for="AddressDetails.Town" class="form-control" />
    <span asp-validation-for="AddressDetails.Town" class="text-danger"></span>
</div>
<div class="form-group">
    <label asp-for="AddressDetails.PostCode" class="control-label"></label>
    <input asp-for="AddressDetails.PostCode" class="form-control" />
    <span asp-validation-for="AddressDetails.PostCode" class="text-danger"></span>
</div>

當我將資料發布回控制器時，這作業正常

ASP.NET MVC 部分在傳遞屬性時不系結

但是，我想重用部分，這意味著我想替換

@model CareHome.Models.CareHomes

在具有模型使用的屬性類（見下文）的部分中。

所以當我把它改成

主要的

<div class="row">
    <div class="col-md-4">
        <form asp-action="Create">
            <div asp-validation-summary="ModelOnly" class="text-danger"></div>
            <div class="form-group">
                <label asp-for="Name" class="control-label"></label>
                <input asp-for="Name" class="form-control" />
                <span asp-validation-for="Name" class="text-danger"></span>
            </div
            @await Html.PartialAsync("../AddressDetails/Create.cshtml", Model.AddressDetails)
            @await Html.PartialAsync("../ContactDetails/Create.cshtml", Model.ContactInfo)
            <div class="form-group">
                <input type="submit" value="Create" class="btn btn-primary" />
            </div>
        </form>
    </div>
</div>

請注意，我現在將屬性傳遞給部分而不是模型

@model CareHome.Models.AddressDetails
<div class="form-group">
    <h4>AddressDetails</h4>
    <hr />
</div>

<div asp-validation-summary="ModelOnly" class="text-danger"></div>
<div class="form-group">
    <label asp-for="NumberStreetName" class="control-label"></label>
    <input asp-for="NumberStreetName" class="form-control" />
    <span asp-validation-for="NumberStreetName" class="text-danger"></span>
</div>
<div class="form-group">
    <label asp-for="Locality" class="control-label"></label>
    <input asp-for="Locality" class="form-control" />
    <span asp-validation-for="Locality" class="text-danger"></span>
</div>
<div class="form-group">
    <label asp-for="Town" class="control-label"></label>
    <input asp-for="Town" class="form-control" />
    <span asp-validation-for="Town" class="text-danger"></span>
</div>
<div class="form-group">
    <label asp-for="PostCode" class="control-label"></label>
    <input asp-for="PostCode" class="form-control" />
    <span asp-validation-for="PostCode" class="text-danger"></span>
</div>

iv 現在將部分更改為使用

@model CareHome.Models.AddressDetails

但是當我將它發布到控制器時它會回傳 null

ASP.NET MVC 部分在傳遞屬性時不系結

我在系結上嘗試了一百萬種變化

 // POST: CareHomes/Create
        // To protect from overposting attacks, enable the specific properties you want to bind to.
        // For more details, see http://go.microsoft.com/fwlink/?LinkId=317598.
        [HttpPost]
        [ValidateAntiForgeryToken]
        //Create([Bind("CareHomesId,Name,ContactName,ContactNumber")] CareHomes careHomes)
        public async Task<IActionResult> Create([Bind( "CareHomes,AddressDetails,ContactDetails")] CareHomes careHomes)
        {
            if (ModelState.IsValid)
            {
                _context.Add(careHomes);
                await _context.SaveChangesAsync();
                return RedirectToAction(nameof(Index));
            }
            ViewData["AddressDetailsId"] = new SelectList(_context.AddressDetails, "AddressDetailsId", "NumberStreetName", careHomes.AddressDetailsId);
            ViewData["ContactDetailsId"] = new SelectList(_context.ContactDetails, "ContactDetailsId", "ContactName", careHomes.ContactDetailsId);
            return View(careHomes);
        }

但是當我評估 ModelState 時，我可以看到它總是丟失。由于模型的屬性在我傳遞模型時系結正常，但為什么當我傳遞屬性時它們不系結

我的課是這樣的

using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;

namespace CareHome.Models
{
    public class CareHomes
    {
        [Required]
        [Key, DatabaseGenerated(DatabaseGeneratedOption.Identity)]
        public int CareHomesId { get; set; }

        [Required]
        [Column(TypeName = "VARCHAR(256)")]
        [StringLength(256, MinimumLength = 3)]
        public string Name { get; set; }

        public int? AddressDetailsId { get; set; }

        public AddressDetails AddressDetails { get; set; }

        public int? ContactDetailsId { get; set; }

        public ContactDetails ContactInfo { get; set; }

        public ICollection<Staff>? StaffMembers { get; set; }
    }
}

和有問題的屬性之一

using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;

namespace CareHome.Models
{
    public class AddressDetails
    {
        [Required]
        [Key, DatabaseGenerated(DatabaseGeneratedOption.Identity)]
        public int AddressDetailsId { get; set; }

        [Required]
        [Column(TypeName = "VARCHAR(256)")]
        [StringLength(256, MinimumLength = 3)]
        [Display(Name = "House No & Street Name")]
        public string NumberStreetName { get; set; }

        [Column(TypeName = "VARCHAR(256)")]
        [StringLength(256, MinimumLength = 3)]
        public string? Locality { get; set; }

        [Required]
        [Column(TypeName = "VARCHAR(256)")]
        [StringLength(256, MinimumLength = 3)]
        public string Town { get; set; }

        [Required]
        [Column(TypeName = "VARCHAR(16)")]
        [StringLength(16, MinimumLength = 4)]
        [RegularExpression(@"^(([A-Z]{1,2}\d[A-Z\d]?|ASCN|STHL|TDCU|BBND|[BFS]IQQ|PCRN|TKCA) ?\d[A-Z]{2}|BFPO ?\d{1,4}|(KY\d|MSR|VG|AI)[ -]?\d{4}|[A-Z]{2} ?\d{2}|GE ?CX|GIR ?0A{2}|SAN ?TA1)$", ErrorMessage = "Please enter a valid UK post code in upper case")]
        public string PostCode { get; set; }

        public CareHomes? CareHomes { get; set; }
    }
}

我嘗試添加系結影片，例如

[BindProperty]

到屬性并在部分中添加隱藏欄位

@Html.HiddenFor(m => m.AddressDetailsId)
@Html.HiddenFor(m => m.AddressDetails)

根據我所做的許多 SO 搜索中的一些建議，但沒有骰子......所以請......我錯過了什么？

我什至嘗試過@html.EditorFor 但這似乎有同樣的問題

編輯

使用@Jonesopolis 的建議，我可以從使用模型時發回的表單中看到：

?this.Request.Form.ToArray()
{System.Collections.Generic.KeyValuePair<string, Microsoft.Extensions.Primitives.StringValues>[11]}
    ...
    [4]: {[AddressDetails.CareHomes, {}]}
    [5]: {[AddressDetailsId, {}]}
    [6]: {[AddressDetails.NumberStreetName, {sad}]}
    [7]: {[AddressDetails.Locality, {sad}]}
    [8]: {[AddressDetails.Town, {wales}]}
    [9]: {[AddressDetails.PostCode, {CF83 8RD}]}

vs 當我通過房產時

?this.Request.Form.ToArray()
{System.Collections.Generic.KeyValuePair<string, Microsoft.Extensions.Primitives.StringValues>[11]}
    ...
    [4]: {[CareHomes, {}]}
    [5]: {[AddressDetailsId, {0}]}
    [6]: {[NumberStreetName, {test street}]}
    [7]: {[Locality, {}]}
    [8]: {[Town, {wales}]}
    [9]: {[PostCode, {CF83 8RD}]}

很明顯，缺少“AddressDetails”，因此 MVC 無法將屬性映射到系結上的 CareHomes 類物件，因為缺少屬性名稱。所以我知道問題不是如何解決它，如何在部分屬性上設定屬性名稱，以便它們映射回父物件類。我雖然有一個 costom 活頁夾，但沒有太多運氣弄清楚那個。

在旁注中，如果在partent模型中我這樣做就足夠有趣了：

@Html.EditorFor(m => m.AddressDetails.NumberStreetName)

然后像這樣系結

 public async Task<IActionResult> Create([Bind(include: "CareHomes,AddressDetails")] CareHomes careHomes)

我至少可以讓 EditorFor 拉到父母身上

uj5u.com熱心網友回復：

終于解決了，似乎模型系結不是問題，我只需要在部分表單控制元件上設定 id 和 name 屬性以匹配模型操作上物件的屬性，例如 id="AddressDetails_NumberStreetName" name= “AddressDetails.NumberStreetName”

所以添加

<div class="form-group">
    <label asp-for="NumberStreetName" class="control-label"></label>
    <input asp-for="NumberStreetName" id="AddressDetails_NumberStreetName" name="AddressDetails.NumberStreetName" class="form-control" />
    <span asp-validation-for="NumberStreetName" class="text-danger"></span>
</div>
<div class="form-group">
    <label asp-for="Locality" class="control-label"></label>
    <input asp-for="Locality" id="AddressDetails_Locality" name="AddressDetails.Locality" class="form-control" />
    <span asp-validation-for="Locality" class="text-danger"></span>
</div>
<div class="form-group">
    <label asp-for="Town" class="control-label"></label>
    <input asp-for="Town" id="AddressDetails_Town" name="AddressDetails.Town" class="form-control" />
    <span asp-validation-for="Town" class="text-danger"></span>
</div>
<div class="form-group">
    <label asp-for="Postcode" class="control-label"></label>
    <input asp-for="Postcode" id="AddressDetails_Postcode" name="AddressDetails.Postcode" class="form-control" />
    <span asp-validation-for="Postcode" class="text-danger"></span>
</div>

允許它正確映射到控制器模型

public async Task<IActionResult> Create([Bind(include: "CareHomes, Name,AddressDetails, ContactInfo")] CareHomes careHomes)

當我將部分標記放在主表單中并查看 HTML 標記并將其與部分標記時進行比較時，我解決了這個問題。我希望有一天這對其他人有所幫助

轉載請註明出處，本文鏈接：https://www.uj5u.com/qiye/503898.html

標籤：C＃。网 asp.net-mvc asp.net-mvc-4 模型视图控制器

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