 
public function removeItemAt(index:int):Object 
{ 
if (index < 0 || index >= length) 
{ 
var message:String = resourceManager.getString( 
"collections", "outOfBounds", [ index ]); 
throw new RangeError(message); 
} 

var listIndex:int = index; 
if (localIndex) 
{ 
var oldItem:Object = localIndex[index]; 
listIndex = list.getItemIndex(oldItem); 
} 
return list.removeItemAt(listIndex); 
} 

因?yàn)関ar oldItem:Object = localIndex[index];中l(wèi)ocalIndex是一個(gè)未被過(guò)濾的數(shù)據(jù)。

三、解決

ArrayCollection中有l(wèi)ist的屬性：

復(fù)制代碼代碼如下:

 
public function get list():IList 
{ 
return _list; 
} 

_list就是原始數(shù)據(jù)。

所以如果要在添加了過(guò)濾器的ArrayCollection上刪除過(guò)濾的數(shù)據(jù)，需要list的幫助。實(shí)現(xiàn)代碼如下：

復(fù)制代碼代碼如下:

 
public function findEmployeeInSource(id:int):OrgEmployee { 
var obj:OrgEmployee = null; 
var list:IList = employees.list; 
var len:int = list.length; 
for (var index:int = 0; index < len; index++) { 
obj = list.getItemAt(index) as OrgEmployee; 
if (obj.id == id) { 
return obj; 
} 
} 
return null; 
} 

public function deleteEmployee(id:int):void { 
var obj:OrgEmployee = findEmployeeInSource(id); 
if (obj != null) { 
var index:int = employees.list.getItemIndex(obj); 
employees.list.removeItemAt(index); 
} 
} 

或者一個(gè)函數(shù)：

復(fù)制代碼代碼如下:

 
public function deleteEmployee(id:int):void { 
var obj:OrgEmployee = null; 
var list:IList = employees.list; 
var len:int = list.length; 
for (var index:int = 0; index < len; index++) { 
obj = list.getItemAt(index) as OrgEmployee; 
if (obj.id == id) { 
list.removeItemAt(index); 
return; 
} 
} 
} 