asp.net 如何在C#中传递多个iformfile在post action中创建产品

qpgpyjmq  于 2022-12-01  发布在  .NET
关注(0)|答案(1)|浏览(208)

我希望用户输入带有图像的产品颜色****多次
因此我有ProductDto包含colorDto列表，而colorDto包含IFormFile图像列表

ProductDto

public class ProductDto
    {
        public int id { get; set; }

        [Required(ErrorMessage = "Please Enter The Title")]
        [MaxLength(500, ErrorMessage = "Must be less than 500 Chars")]
        public string Name { get; set; }

        [Required, Display(Name = "Product Description")]
        [DataType(DataType.MultilineText)]
        public string Description { get; set; }


        [Required, Display(Name = "Product Price")]
        public int Price { get; set; }

        [Required(ErrorMessage = "Must Enter Product Amount")]
        [ Display(Name = "Stock")]
        public int inStock { get; set; }

        [Display(Name = "New Price")]
        public  int  NewPrece { get; set; }
        [Required(ErrorMessage = "Must Enter Product Color")]

        [Display(Name = "color")]
        public ColorDto color { get; set; }
       
        [Display(Name = "size")]
        public string size { get; set; }
        [Required(ErrorMessage = "Must Enter Product Brand")]
        [Display(Name = "Brand")]
        public int BrandId { get; set; }

        [Required(ErrorMessage = "Must Enter Product Category")]
        [Display(Name = "Category")]
        public int CategoryId { get; set; }
        public int rate { get; set; }
        public List<ColorDto> colors { get; set;}

    }

颜色Dto

public class ColorDto
    {
        public int id { get; set; }
        public int Productid {get;set;}
                public string Name { get; set; }  
                public List<IFormFile> Images { get; set; }
        
    }

我的产品控制器

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using AdminDashboard.ProductConfigration;
using BTechModel;
using Microsoft.AspNetCore.Mvc;
using NToastNotify;
using Microsoft.AspNetCore.Identity;
using Microsoft.AspNetCore.Authorization;
using System.Data;
using Microsoft.EntityFrameworkCore;
using Microsoft.AspNetCore.Mvc.Rendering;
using Microsoft.AspNetCore.Routing;
using static System.Collections.Specialized.BitVector32;
using System.IO;
using Microsoft.AspNetCore;
using System.Xml.Linq;
using Microsoft.AspNetCore.Hosting;
using NToastNotify;
using AdminDashboard.Models;
using AdminDashboard.IRepository;
using Newtonsoft.Json;
// For more information on enabling MVC for empty projects, visit https://go.microsoft.com/fwlink/?LinkID=397860

namespace AdminDashboard.Controllers
{
    public class ProductController : Controller
    {
        ApplicationDbContext context;
        private readonly IproductCreation iproductCreation;
        private readonly IToastNotification toastNotification;
        private readonly IColortRepository colortRepository;
        public ProductController(ApplicationDbContext dbContext, IproductCreation iproduct, IWebHostEnvironment webhost, IToastNotification _toastNotification, IColortRepository _colortRepository)
        {
            context = dbContext;
            iproductCreation = iproduct;
            toastNotification = _toastNotification;
            colortRepository = _colortRepository;

        }
        // GET: /<controller>/
        public IActionResult Index()
        {
            return View();
        }

        public IActionResult AddNewProduct()
        {
            ViewBag.Brand = context.Brands.Select(i => new SelectListItem(i.Name,           i.BrandId.ToString())).AsNoTracking();
            ViewBag.Category = context.Category.Select(i => new SelectListItem(i.Name, i.CategoryId.ToString())).AsNoTracking();
            return View("ProductForm");
        }
        [HttpPost]

        public IActionResult AddNewProduct(ProductDto product)
        {
           
            TempData["ProductFromAdd"] = JsonConvert.SerializeObject(product);

            return RedirectToAction("AddProductImages");
        }

        [HttpGet]
        public IActionResult AddProductImages(ProductDto productdto)
        {
            if (TempData["ProductFromAdd"] != null)
            {

                 productdto = JsonConvert.DeserializeObject<ProductDto>((string)TempData["ProductFromAdd"]);
            }
            if (productdto.colors == null)
            {
                productdto.colors = new List<ColorDto>();
            }

            return View(productdto);
        }
        [HttpPost]
        public IActionResult Addimages( ProductDto _productdto)
        {
           
            var _color = _productdto.color;

      
            if (_productdto.colors == null)
            {
                _productdto.colors = new List<ColorDto>
                {
                    _color
                };
            }
            else
            {
                _productdto.colors.Add(_color);
            }

            return View("AddProductImages", _productdto);
        }

        
    }
}

产品形式

<form  method="post" asp-controller="Product" asp-action="AddNewProduct" enctype="multipart/form-data">
    <div asp-validation-summary="ModelOnly" class="text-danger"></div>

    <div>
        <div class="form-group">
            <label asp-for="Name"></label>
            <input asp-for="Name" name="Name" class="form-control" />
            <span asp-validation-for="Name" class="validation"></span>
        </div>
    </div>

    <div class="form-group">

        <label asp-for="Description"></label>
        <input asp-for="Description" class="form-control" />
        <span asp-validation-for="Description" class="validation"></span>
    </div>

    <div class="form-group">

        <label asp-for="BrandId"></label>
        <select asp-for="BrandId" class="form-control js-example-basic-single" asp-items="ViewBag.Brand">
        </select>
        <span asp-validation-for="BrandId" class="validation"></span>
    </div>

    <div class="form-group">

        <label asp-for="CategoryId"></label>
        <select asp-for="CategoryId" asp-items="ViewBag.Category" class="form-control js-example-basic-single " id="id_label_single" data-live-search="true" data-live-search-style="startsWith">
        </select>
        <span asp-validation-for="CategoryId" class="validation"></span>

    </div>

    <div class="form-group">
        <label asp-for="size"></label>
        <input asp-for="size" class="form-control" />
        <span asp-validation-for="size" class="validation"></span>
    </div>

    <div class="form-group">
        <label asp-for="inStock"></label>
        <input asp-for="inStock" class="form-control" />
        <span asp-validation-for="inStock" class="validation"></span>
    </div>

    <div class="form-group">
        <label asp-for="Price"></label>
        <input asp-for="Price" class="form-control" />
        <span asp-validation-for="Price" class="validation"></span>
    </div>

    <div class="form-group">

        <label asp-for="NewPrece"></label>
        <input asp-for="NewPrece" class="form-control" />

    </div>

  

    <input type="submit" value="Add" class="btn btn-primary" />
</form>

此处颜色表单

<form method="post" asp-controller="Product" asp-action="Addimages" enctype="multipart/form-data">
    <div asp-validation-summary="ModelOnly" class="text-danger"></div>

    <div class="form-group">

        <label asp-for="color.Images"></label>
        <input asp-for="color.Images" multiple class="form-zcontrol form-control" />
        <span asp-validation-for="color.Images" class="validation"></span>
    </div>

    <div class="form-group">
        <div>
            <label asp-for="color.Name"> Choose The Product Color</label>
            <input asp-for="color.Name" name="color.Name" class="form-control" type="color">

            <span asp-validation-for="color.Name" class="validation"></span>
        </div>
    </div>
    <input asp-for="Name" name="Name" value="@Model.Name" class="form-control" hidden />
    <input asp-for="CategoryId" name="Name" value="@Model.CategoryId" class="form-control" hidden />

    <input asp-for="BrandId" name="BrandId" value="@Model.BrandId" class="form-control" hidden />

    <input asp-for="size" name="size" value="@Model.size" class="form-control" hidden />

    <input asp-for="inStock" name="inStock" value="@Model.inStock" class="form-control" hidden />

    <input asp-for="Price" name="Price" value="@Model.Price" class="form-control" hidden />
    <input asp-for="NewPrece" name="NewPrece" value="@Model.NewPrece" class="form-control" hidden />
    <input asp-for="Description" name="Description" value="@Model.Description" class="form-control" hidden />
    @if (Model.colors.Count > 0 || Model.colors != null)
        {
            for (int i = 0; i < Model.colors.Count; i++)
            {
            <div class="form-group mt-20">
            
                @if (@Model.colors[i].Images.Count > 0)
                 {
                    for (int j = 0; j < @Model.colors[i].Images.Count; j++)
                    {
                        <input class=" form-control"  asp-for="@Model.colors[i].Images[j]." name="Images" type="hidden"  />
                    }
                  }

                <input class="form-control" asp-for="colors[i].Name" type="hidden" />
            </div>
        }
    }

    <input type="submit" value="Add" class="btn btn-primary" />
    <input type="submit" value="CreateProduct" class="btn btn-primary" asp-controller="Product" asp-action="CreateProduct" />

</form>

Colors.Images返回空列表的问题
但返回名称

asp.net

1条答案

按热度按时间
wz8daaqr

wz8daaqr1#

Colors.Images返回空列表但返回名称
因为您将图像名称设置为asp-for="color.Images"
<input asp-for="color.Images" multiple class="form-zcontrol form-control" />
因此您将把图像列表传递给color.Images而不是colors.Images。

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