DropDownlist值插入爲System.Collections.Generic.List`1 [System.Web.Mvc.SelectListItem]

Question

我試圖插入dropdownlist的值在數據庫中，但不是存儲其選定的值，它是 存儲此值System.Collections.Generic.List1[System.Web.Mvc.SelectListItem]。 這是我的代碼。 查看：

 @Html.DropDownListFor(m =>m.propertyType, (List<SelectListItem>) ViewData["property"]) 

型號：

public string propertyType { get; set; } 


    [HttpGet] 
    public ActionResult EditProfile() 

    { 
     List<SelectListItem> items = new List<SelectListItem>(); 
     items.Add(new SelectListItem { Text = "Private Residence", Value = "Private Residence" }); 
     items.Add(new SelectListItem { Text = "Office", Value = "Office" }); 
     items.Add(new SelectListItem { Text = "Place of worship", Value = "Place of worship" }); 
     items.Add(new SelectListItem { Text = "Commercial Parking lot", Value = "Commercial Parking lot" }); 
     items.Add(new SelectListItem { Text = "Retail", Value = "Retail" }); 
     items.Add(new SelectListItem { Text = "Academic Institution", Value = "Academic Institution" }); 
     items.Add(new SelectListItem { Text = "Other", Value = "Other" }); 
     ViewData["property"] = items; 




     return View(); 
    } 

    [HttpPost] 

    public ActionResult EditProfile(EditProfile edit) 
    { 
     List<SelectListItem> items = new List<SelectListItem>(); 
     items.Add(new SelectListItem { Text = "Private Residence", Value = "Private Residence" }); 
     items.Add(new SelectListItem { Text = "Office", Value = "Office" }); 
     items.Add(new SelectListItem { Text = "Place of worship", Value = "Place of worship" }); 
     items.Add(new SelectListItem { Text = "Commercial Parking lot", Value = "Commercial Parking lot" }); 
     items.Add(new SelectListItem { Text = "Retail", Value = "Retail" }); 
     items.Add(new SelectListItem { Text = "Academic Institution", Value = "Academic Institution" }); 
     items.Add(new SelectListItem { Text = "Other", Value = "Other" }); 
     ViewData["property"] = items; 
     string UserName = User.Identity.Name; 
     var query = from q in Session.Query<Registration>() 
        where q.Email == UserName 
        select q; 
     if (query.Count() > 0) 
     { 
      foreach (var update in query) 
      { 

       update.contactNo = edit.contactNo; 
       update.occupation = ViewData["property"].ToString(); 
      } 
     } 
     else ModelState.AddModelError("",""); 

     Session.SaveChanges(); 

     return View(); 
    } 

任何幫助將是非常appreciated.Thanks！

Answer 1

此行是瘋狂：

update.occupation = ViewData["property"].ToString(); 

應該be：

update.occupation = edit.propertyType; 

Answer 2

我總是儘量避免使用ViewData或ViewBag。試試下面這個porpose：

所有的下拉列表中創建靜態類：

public static class MyDrops 
{ 

public static List<SelectListItem> GetList() 
{ 
List<SelectListItem> items = new List<SelectListItem>(); 
     items.Add(new SelectListItem { Text = "Private Residence", Value = "Private Residence" }); 
     items.Add(new SelectListItem { Text = "Office", Value = "Office" }); 
     items.Add(new SelectListItem { Text = "Place of worship", Value = "Place of worship" }); 
     items.Add(new SelectListItem { Text = "Commercial Parking lot", Value = "Commercial Parking lot" }); 
     items.Add(new SelectListItem { Text = "Retail", Value = "Retail" }); 
     items.Add(new SelectListItem { Text = "Academic Institution", Value = "Academic Institution" }); 
     items.Add(new SelectListItem { Text = "Other", Value = "Other" }); 
return items; 
} 
} 

在您查看

然後：

@Html.DropDownListFor(m =>m.propertyType, MyDrops.GetList())