使用asp.net mvc 2.0將數據從數據庫綁定到dropdownlist

我從表tblemployee中選擇要將其綁定到下拉列表的數據時遇到問題。使用asp.net mvc 2.0將數據從數據庫綁定到dropdownlist

模式

public class UserModels 
{ 
    public string EmployeeName { get; set; } 
    public int EmployeeCode { get; set; } 
    public IEnumerable<SelectListItem> Employee { set; get; } 
}

控制器

public ActionResult Education() { 

     var query = (from e in context.tblEmployee_Employee 
        select new 
        { 
         empID = e.Code, 
         EmpName = e.NameEng 
        } 
          ).ToList(); 

     var model = new UserModels(); 
     var _Emp = query; 
     foreach (var item in _Emp) 
     { 
      model.EmployeeCode = item.empID; 
      model.EmployeeName = item.EmpName; 
      model.Employee = new SelectList(_Emp, "EmpName", "EmpName"); 

     } 

     return View(model); 
    }

查看

<%= Html.DropDownListFor(x => x.EmployeeName, Model.Employee, "select EmployeeName")%>

而且我得到了錯誤消息「對象重沒有設置一個對象的實例「。任何人都知道請告訴我如何解決它。謝謝，

來源

2012-08-01 Maly

嘗試這樣的：

public ActionResult Education() 
{ 
    var model = new UserModels(); 
    model.Employee = context 
     .tblEmployee_Employee 
     .ToList() 
     .Select(e => new SelectListItem 
     { 
      Value = e.Code.ToString(), 
      Text = e.NameEng 
     }); 
    return View(model); 
}

，並確保你的看法是強類型的UserModels視圖模型，然後：

<%= Html.DropDownListFor(
    x => x.EmployeeName, 
    Model.Employee, 
    "select EmployeeName" 
) %>

來源

2012-08-01 16:43:54

謝謝，但我還是得到了同樣的錯誤。 – Maly 2012-08-01 16:57:05

你會在哪一行發生錯誤？ – 2012-08-01 17:08:05

我對視圖模型有錯誤「<％= Html.DropDownListFor（x => x.EmployeeName，Model.Employee，」select EmployeeName「）％>」。它顯示錯誤是「Object reference not set an instance of一個對象「 – Maly 2012-08-01 17:30:26

使用asp.net mvc 2.0將數據從數據庫綁定到dropdownlist

回答

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