如何将LINQ数据传递给View。我使用了下面的代码，但它引发了转换错误。
namespace WebApplication1.DataContext
{
public class Repositary
{
public ProductMaster productMaster { get; set; }
public ProductDetail productDetail { get; set; }
}
}`
行动方法： -
public ActionResult ProductMasterWithDetails()
{
Model1 db=new Model1();
Repositary rep = new Repositary();
var varResult= from pm in db.ProductMasters join pd in db.ProductDetails on pm.ProductId equals pd.ProductId select new { pm.ProductId, pm.ProductName, pd.Price, pd.ManufactureBy };
ViewBag.result = varResult.ToList();
return View();
}
错误：无法初始化类型＆＃39; WebApplication1.DataContext.Repositary＆＃39; 使用集合初始值设定项，因为它没有实现 ＆＃39; System.Collections.IEnumerable＆＃39;
C：\ Users \ msnsh \ onedrive \ documents \ visual studio 2013 \ Projects \ WebApplication1 \ WebApplication1 \ Controllers \ ProductController.cs 55 141 WebApplication1
在视图中
@foreach (var result in ViewBag.result){
}
我有两个模型类如下。
namespace WebApplication1.DataContext
{
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using System.Data.Entity.Spatial;
[Table("ProductMaster")]
public partial class ProductMaster
{
public ProductMaster()
{
ProductDetails = new HashSet<ProductDetail>();
}
[Key]
[DatabaseGenerated(DatabaseGeneratedOption.None)]
public int ProductId { get; set; }
[StringLength(50)]
public string ProductName { get; set; }
public virtual ICollection<ProductDetail> ProductDetails { get; set; }
}
}
namespace WebApplication1.DataContext
{
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using System.Data.Entity.Spatial;
public partial class ProductDetail
{
public int? Price { get; set; }
[StringLength(50)]
public string ManufactureBy { get; set; }
public int? ProductId { get; set; }
[Key]
public int ProdDetailsId { get; set; }
public virtual ProductMaster ProductMaster { get; set; }
}
}
如果我们有两个模型类，那么如何替换下面的单个模型命名空间？
@model IEnumerable
我无法创建如下所示的单个类，因为我的模型有两个类，
public Class ProductCustomModel
{
public int ProductId { get; set; }
public int ProductName { get; set; }
public int Price { get; set; }
public int ManufactureBy { get; set; }
}
这是我的Model1类。
namespace WebApplication1.DataContext
{
using System;
using System.Data.Entity;
using System.ComponentModel.DataAnnotations.Schema;
using System.Linq;
using System.Data.Entity.Spatial;
public partial class Model1 : DbContext
{
public Model1()
: base("name=Model1")
{
}
public virtual DbSet<ProductDetail> ProductDetails { get; set; }
public virtual DbSet<ProductMaster> ProductMasters { get; set; }
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.Entity<ProductDetail>()
.Property(e => e.ManufactureBy)
.IsUnicode(false);
modelBuilder.Entity<ProductMaster>()
.Property(e => e.ProductName)
.IsUnicode(false);
}
}
}
答案 0 :(得分：1)
如果你在varResult中获得的数据超过了你应该尝试的数据，
在Conroller中。
Model1 db=new Model1();
var varResult= (from pm in db.ProductMasters join pd in db.ProductDetails on pm.ProductId equals pd.ProductId select new { pm.ProductId, pm.ProductName, pd.Price, pd.ManufactureBy }).ToList();
return View("path to the view",varResult);
在视图中
@model ModelName
@foreach (var result in Model){
}
答案 1 :(得分：0)
您需要将ViewBag更改为customModel/Class，List会将namespace WebApplication1.DataContext
{
public class Repositary
{
public ProductMaster productMaster { get; set; }
public ProductDetail productDetail { get; set; }
}
public Class ProductCustomModel
{
public int ProductId { get; set; }
public int ProductName { get; set; }
public int Price { get; set; }
public int ManufactureBy { get; set; }
}
}
发送到您的视图。
<强>型号：
public ActionResult ProductMasterWithDetails()
{
Model1 db=new Model1();
Repositary rep = new Repositary();
var varResult= from pm in db.ProductMasters join pd in db.ProductDetails on pm.ProductId equals pd.ProductId select new { pm.ProductId, pm.ProductName, pd.Price, pd.ManufactureBy };
//Make your List Here like this and add the values in it.
List<ProductCustomModel> productCustomModelList = new List<ProductCustomModel>();
Foreach(ProductCustomModel item in varResult)
{
ProductCustomModel singleData = new ProductCustomModel();
ProductId = item.ProductId,
ProductName = item.ProductName,
Price = item.Price,
ManufactureBy = item.ManufactureBy
productCustomModelList.Add(singleData);
}
return View(productCustomModelList);
将您的操作方法更改为：
@model IEnumerable<WebApplication1.DataContext.ProductCustomModel>
@foreach (var result in Model){
//.. operations
}
}
在视图（.cshtml）
中import os
from django.utils.translation import ugettext_lazy as _
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
DEBUG = True
ALLOWED_HOSTS = []
INSTALLED_APPS = [
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'polls.apps.PollsConfig'
]
MIDDLEWARE = [
'django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.locale.LocaleMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
]
ROOT_URLCONF = 'sampleproject.urls'
TEMPLATES = [
{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'DIRS': [],
'APP_DIRS': True,
'OPTIONS': {
'context_processors': [
'django.template.context_processors.debug',
'django.template.context_processors.request',
'django.contrib.auth.context_processors.auth',
'django.contrib.messages.context_processors.messages',
'django.template.context_processors.i18n'
],
},
},
]
WSGI_APPLICATION = 'sampleproject.wsgi.application'
LANGUAGE_CODE = 'en-us'
TIME_ZONE = 'UTC'
USE_I18N = True
USE_L10N = True
USE_TZ = True
LANGUAGES = [
('fi-FI', _('Finnish')),
('en', _('English')),
]
LOCALE_PATHS = [
os.path.join(BASE_DIR, 'locale'),
]