Question

我想使用Linq将以下两个类结果组合在一起并在视图上显示结果？

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; }
    }


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; }
    }

使用LINQ Query连接两个表数据。

 public ActionResult BindProductMasterData()
        {
           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 };
            return View(varResult.ToList());
        }

在View中显示下表列数据 ProductId，ProductName，Price，ManufactureBy

Answer 1

为此视图创建一个视图模型，并将LINQ连接查询结果分配给该列表并将其传递给视图。

/usr/local/etc/php/7.0/php.ini

并在您的操作方法中，将LINQ查询的结果投影到ProductVm对象列表。

public class ProductVm
{
  public int Id { set;get;}
  public string Name  { set;get;}
  public List<ProductDetailVm> Details { set;get;}
}
public class ProductDetailVm
{
   public int Id { set;get;}
   public int? Price { get; set; }
   public string ManufactureBy { get; set; }
}

现在确保您的视图强烈输入到我们的ProductVm视图模型列表

public ActionResult BindProductMasterData()
{
   Model1 db = new Model1();
   var varResult = db.ProductMasters
                     .Select( f =>
                new ProductVm
                {
                    Id = f.ProductId, 
                    Name = f.ProductName,
                    Details = f.ProductDetails.Select(g => new ProductDetailVm
                                                 { 
                                                   Id = g.ProdDetailsId ,
                                                   Price = g.Price,
                                                   ManufactureBy = g.ManufactureBy
                                                 }
                                       ).ToList()
                }).ToList();
  return View(varResult);
}

加入两个Model类结果并将其显示在View-MVC上

1 个答案: