从返回函数 Razor 填充下拉列表

Question

我正在尝试使用 EF 使用数据库表中的值填充下拉框 首先我不确定这里的返回值 描述是一个字符串，所以我返回一个列表，但这不起作用.. 其次，不是如何使用返回值来填充我的剃刀页面视图中的下拉列表 任何指导表示赞赏 在 web 表单中，它只是一个与控件的数据绑定，这似乎相当复杂

 public List<string> getEstablishments()
        {
            var db = new mydbContext();
            result=db.TblEstablishment.Select(x => new { x.Description }).ToList();

            db.Dispose();
            return result;
        }

Answer 1

在剃刀中：

//in your code, myEstablishments would be passed in somehow
List<string> _myEstablishments = new List<string> {"one", "two"};
@Html.DropDownList(name: "myDropDownList", selectList: _myEstablishments.Select(s => new SelectListItem() { Text = s, Value = s });

Answer 2

将您的选择语句更改为Select(x => x.Description).ToList()。现在的方式是创建一个匿名对象并返回它而不是字符串。要在下拉列表中绑定机构，您可以执行以下操作：

public class EstablishmentOptionView
{
    public int EstablishmentId { get; set;}
    public string Description { get; set;}
}

public List<EstablishmentOptionView> getEstablishments()
{
            var db = new mydbContext();
            result=db.TblEstablishment.Select(x => new EstablishmentOptionView {EstablishmentId = x.Id, Description = x.Description }).ToList();

            db.Dispose();
            return result;
 }

//somewhere else 
SomeDropDownList.DataValueField = "EstablishmentId";
SomeDropDownList.DataTextField = "Description";
SomeDropDownList.DataSource = getEstablishments();
SomeDropDownList.DataBind();