在mvc 4剃须刀中填充下拉列表

问题描述：

这是我在mvc上的第一个应用程序并没有太多想法mvc 4 Razor

i想简单地从数据库中的一个页面插入数据，包括2个下拉列表首先用于城市，第二个用于状态我有三个表首先要插入哪些数据，其余两个用于城市和状态我想要做的是从城市和状态表绑定下拉列表并将其ID保存在主表中我为其创建了模型

This is my first application on mvc and haven't much idea of mvc 4 Razor
i want to simply insert data from one page in database including 2 dropdowns First for city and second for status i have three tables first on which data is to be inserted and rest two for city and status what i am trying to do is bind dropdown from city and status table and save its id in main table i have created model for it

 public class UserCallDetailModel
    {
        [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
        public int ID { get; set; }
        [Required]
        [StringLength(100, ErrorMessage = "The {0} must be at least {2} characters long.", MinimumLength = 2)]
        [DataType(DataType.Text)]
        [Display(Name = "Name")]
        public string Name { get; set; }
        [Required]
        [StringLength(500, ErrorMessage = "The {0} must be at least {2} characters long.", MinimumLength = 5)]
        [DataType(DataType.MultilineText)]
        [Display(Name = "Address")]
        public string Address { get; set; }
        [Required]
        [StringLength(100, ErrorMessage = "The {0} must be at least {2} characters long.", MinimumLength = 10)]
        [DataType(DataType.PhoneNumber)]
        public string ContactNo { get; set; }
        [DataType(DataType.Text)]
        public string EmailID { get; set; }
        [DataType(DataType.Text)]
        public string ProductCat { get; set; }
        [DataType(DataType.Text)]
        public string OrgName { get; set; }
        [DataType(DataType.Text)]
        public string WebSite { get; set; }
        [DataType(DataType.Text)]
        public string FollowUpDetail { get; set; }
        [DataType(DataType.Date)]
        public DateTime FollowUpDate { get; set; }
        [DataType(DataType.Url)]
        public string VisitedSite { get; set; }

        public IEnumerable<SelectListItem> Employees { get; set; }
        [DataType(DataType.Currency)]
        public decimal FinalAmount { get; set; }
        [DataType(DataType.Date)]
        public DateTime LastDate { get; set; }

        public decimal CreatedBy { get; set; }

        public DateTime CreatedDate { get; set; }
        public decimal ModifyBy { get; set; }
        public DateTime ModifyDate { get; set; }
        public bool Enable { get; set; }
        public virtual ICollection<CustomerStatus> StatusID { get; set; }
        public virtual ICollection<City> CityID { get; set; }
    }

    public class CustomerStatus
    {
        public decimal StatusID { get; set; }
        public string StatusName { get; set; }
    }
    public class City
    {
        public decimal CityID { get; set; }
        public string CityName { get; set; }
    }

and controller like using (var db = new TenderKhabarCRMModels())
             {
                SelectList selectList = new SelectList(db.City, "CityID", "CityName");
                ViewBag.EmployeeList = selectList;

                 db.UserCallDetailModel.Add(model);
                 db.SaveChanges();
             }

             return RedirectToAction("UserCallDetailList");
but nothing is happening can some one help

答

创建一个类下面的下拉列表

试试这样

Create a class Dropdownlist like below

Try like this

using System.Collections.Generic;using System.Web.Mvc;

namespace EDaaS.Domain.Utilities
{
    public static class DropDownList<T>
    {
        public static SelectList LoadItems(IList<T> collection, string value, string text)
        {
            return new SelectList(collection, value, text);
        }
    }

}

您的观点

Your View

@Html.DropDownListFor(model => model.CityID, (IEnumerable<SelectListItem>)ViewBag.EmployeeList, "--Select--", new { @class = "select" })

你的ActionResult

Your ActionResult

ViewBag.EmployeeList =
                Domain.Utilities.DropDownList<City>.LoadItems(db.City.ToList(), "CityID", "CityName");

希望这有帮助

Hope this helps

请在页面渲染上填充列表如ViewBag.List = ......

@ Html.DropDownListFor（model => model.Id，new SelectList（Vie） wBag.List，value，text，Model.SelectedId））

Please on page render populate the list as ViewBag.List= ......

@Html.DropDownListFor(model => model.Id, new SelectList(ViewBag.List, "value", "text", Model.SelectedId))

在mvc 4剃须刀中填充下拉列表

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