的SelectList選擇的值不從整數

Question

的陣列如何設置的SelectList

var attributeSet = attribute.AttributeSetAttributes.Where(c => c.AttributeSetID == id).Select(c => c.AttributeID).ToArray(); 

    var attributeList = new SelectList(db.CatAttributes.Where(c => c.IsActive), "ID", "FullName", attributeSet); 
    ViewBag.AttributesList = attributeList; 

和在視圖中我用它像

@Html.ListBoxFor(model => model.Attributes, (SelectList)ViewBag.AttributesList, new { @class = "form-control" }) 

在上述attributeSet得到integer selectedValue屬性分配值，它們的選定特性應該在SelectList => attributeList是真實的，如果我給它顯示了選定的屬性= true只有一個值，但是當我傳遞數組或列表也不會設置所選擇的屬性= true。

Answer 1

所以我固定它，我用來代替的SelectList MultiSelectList，並通過第三個參數爲一個數組

var attributeSet = attribute.AttributeSetAttributes.Where(c => c.AttributeSetID == id).Select(c => c.AttributeID).ToArray(); 

var attributeList = new MultiSelectList(db.CatAttributes.Where(c => c.IsActive), "ID", "FullName"); 
ViewBag.AttributesList = attributeList; 

var model = new AttributeSetViewModel() 
     { 
      AttributeSet = attribute, Attributes = attributeSet 
     }; 

和在瀏覽

@Html.ListBoxFor(model => model.Attributes, (MultiSelectList)ViewBag.AttributesList, new { @class = "form-control" }) 

這設定我所選擇的屬性=真。

感謝@Stephen Muecke的想法！