模型在發布后沒有得到任何屬性填充

問題：各位程式員，您好，我是 ASP.NET 的新手，并試圖弄清楚為什么會發生這種情況幾個小時，但找不到原因。控制器中的模型在發布后沒有獲得任何屬性。它們都是空值，為什么會這樣？

風景

@model AddProductViewModel

@{
    ViewBag.Title = "Add a new Product";
}
<h2 class="text-center">@ViewBag.Title</h2>
<div class="row">
    <div class="col-sm-12 offset-lg-2 col-lg-8 offset-xl-3 col-xl-6">
        <form asp-action="Add" method="post">
            <div class="mb-3">
                <label asp-for="@Model.Model" class="form-label">Model Name</label>
                <input asp-for="@Model.Model" class="form-control" aria-required="true" />
                <span asp-validation-for="Model" class="text-danger"></span>
            </div>
            <div class="mb-3">
                <label asp-for="@Model.Description" class="form-label">Description</label>
                <textarea asp-for="@Model.Description" class="form-control" aria-required="true" rows="5"></textarea>
                <span asp-validation-for="Description" class="text-danger"></span>
            </div>
            <div class="mb-3">
                <label asp-for="@Model.Colour" class="form-label">Colour</label>
                <input asp-for="@Model.Colour" class="form-control" value="" />
                <span asp-validation-for="Colour" class="text-danger"></span>
            </div>
            <div class="mb-3">
                <label asp-for="@Model.Size" class="form-label">Size</label>
                <input asp-for="@Model.Size" class="form-control" value="" />
                <span asp-validation-for="Size" class="text-danger"></span>
            </div>
            <div class="mb-3">
                <label asp-for="@Model.Price" class="form-label">Price</label>
                <input asp-for="@Model.Price" class="form-control" value="" />
                <span asp-validation-for="Price" class="text-danger"></span>
            </div>
            <div class="mb-3">
                <label asp-for="@Model.ImageData" class="form-label">Image URL</label>
                <input asp-for="@Model.ImageData" class="form-control" aria-required="true" />
                <span asp-validation-for="ImageData" class="text-danger"></span>
            </div>
            <div class="mb-3">
                <label asp-for="@Model.CategoryId" class="form-label">Category</label>
                <select asp-for="@Model.CategoryId" class="form-control">
                    @foreach (var category in Model.Categories)
                    {
                        <option value="@category.Id">@category.Name</option>
                    }
                </select>
                <span asp-validation-for="CategoryId" class="text-danger"></span>
            </div>
            <div class="mb-3">
                <label asp-for="@Model.BrandId" class="form-label">Brand</label>
                <select asp-for="@Model.BrandId" class="form-control">
                    @foreach (var brand in Model.Brands)
                    {
                        <option value="@brand.Id">@brand.Name</option>
                    }
                </select>
                <span asp-validation-for="BrandId" class="text-danger"></span>
            </div>
            <div class="mb-3">
                <input class="btn btn-primary" type="submit" value="Add" />
            </div>
        </form>
    </div>
</div>
@section Scripts {
    <partial name="_ValidationScriptsPartial" />
}

控制器

...
        [HttpPost]
        public async Task<IActionResult> Add(AddProductViewModel model)
        {
            if (!ModelState.IsValid)
            {
                return View(model);
            }

            try
            {
                await productService.AddProductAsync(model);

                return RedirectToAction("Index", "Home");
            }
            catch (Exception)
            {
                ModelState.AddModelError("", "Something went wrong");

                return View(model);
            }
        }
...

這是我第一次遇到這樣的事情。我做了另一個非常相似的專案，如果不一樣的話。任何幫助將不勝感激！

uj5u.com熱心網友回復：

您的模型包含命名的屬性Model，這將與您的引數沖突AddProductViewModel model。

因此，只需更改您的引數名稱，如下所示：

[HttpPost]
public async Task<IActionResult> Add(AddProductViewModel addProductViewModel)
{
    if (!ModelState.IsValid)
    {
        return View(addProductViewModel);
    }

    try
    {
        await productService.AddProductAsync(addProductViewModel);
        return RedirectToAction("Index", "Home");
    }
    catch (Exception)
    {
        ModelState.AddModelError("", "Something went wrong");

        return View(addProductViewModel);
    }
}

標籤：网asp.net 核心

上一篇：在IIS中使用ASP.NETcoremvc下載發布檔案并復制到客戶端的內部服務器上

下一篇：當字串小或大時添加或洗掉字符