绑定数据到DropDownList MVC剃刀 [英] Binding Data To DropDownList MVC Razor

问题描述

我刚开始使用MVC和Razor的项目。现在我遇到一个问题，当涉及绑定从数据库到下拉列表的数据。请参阅以下代码：

专业化模型：

  public class SpecializationModel 
 {
 [Display（Name =SpecializationID）] 
 public string SpecializationID {get;组; } 
 
 [Display（Name =SpecializationDescription）] 
 public string SpecializationDescription {get;组; } 
 
 public IEnumerable< SelectListItem>物品{get;组; } 
 public int SelectedSpecializationID {get;组; 
} 
  

控制器：

  public ActionResult Physicians（）
 {
 SpecializationManager spec = new SpecializationManager（）; 
列表<专业化> SpecializationList = spec.GetAllSpecialization（）; 
 
 var obj = new SpecializationModel（）; 
 
 obj.Items = new [] 
 {
 foreach（SpecializationList中的var x）
 {
 new SelectListItem {Value = x.SpecializationID.ToString （），Text = x.SpecializationDescription}; 
} 
}; 
 
 return View（obj）; 
} 
  

我有这个经理，其中包含我的LINQ查询从数据库中提取数据。
我在控制器上遇到问题。其中在 foreach 语法中的错误点说无效的表达式术语foreach

$ b $任何人都可以指出我正确的方向吗？非常感谢！

编辑：

我现在在foreach部分没有错误的代码（谢谢下面我结合我以上的职位）。但是，我似乎不能使最后一行工作。它会产生一个关于隐式转换的错误：

  var items = new List< SelectListItem>（）; 
 foreach（SpecializationList中的var x）
 {
 items.Add（new SelectListItem {Value = x.SpecializationID.ToString（），Text = x.SpecializationDescription}）; 
} 
 
 obj.Items = items.ToList（）; 
  

请帮助我。谢谢：）

解决方案

yopu不能在构造函数中抛出一个foreach，请尝试：

  var items = new List< SelectListItem>（）; 
 foreach（SpecializationList中的var x）
 {
 items.add（new SelectListItem {Value = x.SpecializationID.ToString（），Text = x.SpecializationDescription}）; 
} 
 
 obj.Items = items; 
  

已编辑

I have just started with my project using MVC and Razor. Now I am encountering a problem when it comes to binding data coming from the database to a dropdownlist. Please refer on my codes below:

Specialization Model:

public class SpecializationModel
{
    [Display(Name = "SpecializationID")]
    public string SpecializationID { get; set; }

    [Display(Name = "SpecializationDescription")]
    public string SpecializationDescription { get; set; }

    public IEnumerable<SelectListItem> Items { get; set; }
    public int SelectedSpecializationID { get; set; }
}

Controller:

public ActionResult Physicians()
{
    SpecializationManager spec = new SpecializationManager();
    List<Specialization> SpecializationList = spec.GetAllSpecialization();

    var obj = new SpecializationModel();

    obj.Items = new[]
    {
        foreach(var x in SpecializationList)
        {
            new SelectListItem { Value = x.SpecializationID.ToString(), Text = x.SpecializationDescription };
        }
    };

    return View(obj);
}

I have this manager which contains my LINQ query to extract the data from the database. I encounter problems on the controller. Wherein the error points on the foreach syntax saying Invalid expression term foreach

Can anyone please point me to the right direction? Thanks a lot!

EDIT:

I have this code now without errors on the foreach part (thanks to the post below which I combined with what I have above). However, I can't seem to make the last line work. It produces an error about implicit cast:

var items = new List<SelectListItem>();
foreach (var x in SpecializationList)
{
    items.Add(new SelectListItem { Value = x.SpecializationID.ToString(), Text = x.SpecializationDescription });
}

obj.Items = items.ToList();

Please do help me. Thanks :)

解决方案

yopu can't put a foreach in a constructor, try:

var items = new List<SelectListItem >();
foreach(var x in SpecializationList)
{
           items.add(new SelectListItem { Value = x.SpecializationID.ToString(), Text = x.SpecializationDescription });
}

obj.Items = items;

Edited

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