在MVC中用枚举型的下拉框

最新推荐文章于 2024-06-03 14:22:37 发布

翻译最新推荐文章于 2024-06-03 14:22:37 发布 · 1k 阅读

本文详细介绍了如何使用C#创建枚举类型和实体类来实现操作选择界面，包括创建ActionType枚举，定义ActionModel实体类，并通过实现代码将枚举类型与视图结合展示。

创建一个枚举型,ActionType

namespace DropdownExample.Models
{
    public enum ActionType
    {
        Create=1,
        Read=2,
        Update=3,
        Delete=4
    }
}

创建实体类

using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Web.Mvc;
namespace DropdownExample.Models
{
    public class ActionModel
    {
        public ActionModel()
        {
            ActionsList = new List<SelectListItem>();
        }
        [Display(Name="Actions")]
        public int ActionId { get; set; }
        public IEnumerable<SelectListItem> ActionsList { get; set; }       
    }
}

实现代码

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web.Mvc;
using DropdownExample.Models;
namespace DropdownExample.Controllers
{
    public class ActionController : Controller
    {
        public ActionResult Index()
        {
            ActionModel model = new ActionModel();
            IEnumerable<ActionType> actionTypes = Enum.GetValues(typeof(ActionType))
                                                       .Cast<ActionType>();
            model.ActionsList = from action in actionTypes
                                select new SelectListItem
                                {
                                    Text = action.ToString(),
                                    Value = ((int)action).ToString()
                                };
            return View(model);
        }
    }
}

View代码

@model DropdownExample.Models.ActionModel
@{
    ViewBag.Title = "Index";
} 
@Html.LabelFor(model=>model.ActionId)
@Html.DropDownListFor(model=>model.ActionId, Model.ActionsList)