如何將類型'System.Collections.Generic.List <System.Web.Mvc.SelectListItem>'顯式轉換爲'System.Web.Mvc.SelectList'？

Question

我試圖創建一個新的SelectList和通過return Acctlist.ToList<SelectListItem>();語句返回它，但不能因爲錯誤的

無法隱式轉換類型「System.Collections.Generic.List < System.Web.Mvc。 SelectListItem>」到 'System.Web.Mvc.SelectList'

 private SelectList RemoveCustomersWithoutSites(SelectList CustomerSelectList) 
    { 
     // Update the Account Number dropdown in the SafeContacts pages to only include accounts that have at least one monitored location in Stages. 
     SelectList CustList = null; 
     List<SelectListItem> Acctlist = new List<SelectListItem>(); 

     foreach (SelectListItem AcntNumber in CustomerSelectList.Items){ 
      IEnumerable<SelectListItem> siteList = null; 
      siteList = objAPICommon.GetSites(AcntNumber.ToString()); 

      // Add this Account if it has a site 
      if (siteList != null && siteList.Count() > 0) 
      { 
       SelectListItem item; 
       item = new SelectListItem { Text = AcntNumber.Text, Value = AcntNumber.Value }; 
       Acctlist.Add(item); 
      } 
     } 

     return ***Acctlist.ToList<SelectListItem>()***; 
    } 

我應該怎樣投或轉換Acctlist成SelectList好嗎？謝謝。

Answer 1

創建一個新的SelectList與項目：

new SelectList(items)