Question

任何人都可以告诉我，我需要MVC C＃Viewmodel从多个表连接数据并使用chtml页面@model ViewModels.StoreBrowseViewModel。但我的逻辑只会检索一个表数据。这是我的班级图。红框主键，蓝框外键

这是我的StoreBrowseViewModel类

 public class StoreBrowseViewModel
 {

        public int Id { get; set; }
        public string Shape { get; set; }
        public string Name { get; set; }
        public string Clarity { get; set; }
        public int CategoryID { get; set; }
        public Category Category { get; set; }
        public Shape Shapes { get; set; }
        public IEnumerable<Gemstone> Gemstones { get; set; }
        public IEnumerable<Clarity> Clarites { get; set; }
}

 public class StoreBrowseViewModel
 {

        public int Id { get; set; }
        public string Shape { get; set; }
        public string Name { get; set; }
        public string Clarity { get; set; }
        public int CategoryID { get; set; }
        public Category Category { get; set; }
        public Shape Shapes { get; set; }
        public IEnumerable<Gemstone> Gemstones { get; set; }
        public IEnumerable<Clarity> Clarites { get; set; }
}

这是我的行动方法。

 public ActionResult Browse(string gemCategory = "")
 {

  var gemstones = from g in db.Gemstones
                            select g;
var category = db.Categories.Where(p => p.Name == gemCategory).FirstOrDefault();
 gemstones = (gemstones.Include(s => s.Shapes)
                    .Include(c => c.Clarities)
                    .Where(p => p.CategoryID == category.CategoryID)); 
 var viewModel = new StoreBrowseViewModel()            
            {
                Category = category,
                Gemstones = gemstones,
            };
 return this.View(viewModel);
}

这是我的视图模型chtml页面

@model ViewModels.StoreBrowseViewModel
grid.Column("Carat", header: "Weight " + Html.SortDirection(ref grid, "Carat")@item.Carat),
grid.Column("ShapeId", header: "Shape " + Html.SortDirection(ref grid, "Shape")@item.Shape),
grid.Column("ClarityId", header: "Clarity " + Html.SortDirection(ref grid, "Clarity")@item.Clarity),
grid.Column("Price", header: "Price(USD) " + Html.SortDirection(ref grid, "Price")@item.Price),

这是我的输出它应该显示形状名称和清晰度名称

Answer 1

我会采用与以下内容有所不同的方式，但这应该有所帮助......

public ActionResult Browse(string gemCategory = "")
{
    var category = db.Categories.FirstOrDefault(p => p.Name == gemCategory);

    var gemstones = db.Gemstones.Include(s => s.Shapes)
                                .Include(c => c.Clarities)
                                .Include(c => c.Categories)
                                .Include(c => c.Cuts)
                                .Include(c => c.Orgins)
                                .Where(p => p.CategoryID == category.CategoryID);

    var viewModel = new StoreBrowseViewModel() {Gemstones = gemstones};

    return View(viewModel);
}

查看模型

public class StoreBrowseViewModel
{
    public IEnumerable<Gemstone> Gemstones { get; set; }
}

视图中的

@foreach(var item in Model.Gemstones)
{
    <span>@item.Name</span>

    @foreach(var item2 in Model.Gemstones.Clarities)
    {
        <span>@item2.Name</span>
    }
}

如何使用MVC C＃Viewmodel来连接多个表中的数据

1 个答案: