问题描述
通常我会将数据绑定到带有 SelectList
的 DropDownListFor
:
Normally I would bind data to a DropDownListFor
with a SelectList
:
@Html.DropDownListFor(model => model.CustomerId, new SelectList(Model.Orders, "OrderId", "ItemName"))
有没有办法通过强类型的 lambda 表达式而不是属性字符串来做到这一点.例如:
Is there any way to do this through strongly-typed lambdas and not with property strings. For example:
@Html.DropDownListFor(model => model.CustomerId, new SelectList(Model.Orders, x => x.OrderId, x => x.ItemName))
推荐答案
您可以在控制器中创建选择列表本身,并将其分配给视图模型中的属性:
You could create the select list itself in the controller and assign it to a property in your view model:
public IEnumerable<SelectListItem> OrdersList { get; set; }
控制器中的代码如下所示:
The code in your controller will look like this:
model.OrdersList = db.Orders
.Select(o => new SelectListItem { Value = o.OrderId, Text = o.ItemName })
.ToList();
在视图中你可以这样使用它:
In the view you can use it like this:
@Html.DropDownListFor(model => model.CustomerId, Model.OrderList)
我个人更喜欢这种方法,因为它减少了您观点中的逻辑.它还使您的逻辑保持强类型",在任何地方都没有魔法字符串.
I personally prefer this approach since it reduces logic in your views. It also keeps your logic 'stronly-typed', no magic strings anywhere.
这篇关于到 DropDownListFor 的强类型绑定?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!