ArrayList::RemoveRange Method
Removes a range of elements from the ArrayList.
Assembly: mscorlib (in mscorlib.dll)
Parameters
- index
- Type: System::Int32
The zero-based starting index of the range of elements to remove.
- count
- Type: System::Int32
The number of elements to remove.
| Exception | Condition |
|---|---|
| ArgumentOutOfRangeException | index is less than zero. -or- count is less than zero. |
| ArgumentException | index and count do not denote a valid range of elements in the ArrayList. |
| NotSupportedException | The ArrayList is read-only. -or- The ArrayList has a fixed size. |
In collections of contiguous elements, such as lists, the elements that follow the removed element move up to occupy the vacated spot. If the collection is indexed, the indexes of the elements that are moved are also updated. This behavior does not apply to collections where elements are conceptually grouped into buckets, such as a hash table.
This method is an O(n) operation, where n is Count.
The following code example shows how to remove elements from the ArrayList.
using namespace System; using namespace System::Collections; void PrintValues( IEnumerable^ myList ); int main() { // Creates and initializes a new ArrayList. ArrayList^ myAL = gcnew ArrayList; myAL->Add( "The" ); myAL->Add( "quick" ); myAL->Add( "brown" ); myAL->Add( "fox" ); myAL->Add( "jumped" ); myAL->Add( "over" ); myAL->Add( "the" ); myAL->Add( "lazy" ); myAL->Add( "dog" ); // Displays the ArrayList. Console::WriteLine( "The ArrayList initially contains the following:" ); PrintValues( myAL ); // Removes the element containing "lazy". myAL->Remove( "lazy" ); // Displays the current state of the ArrayList. Console::WriteLine( "After removing \"lazy\":" ); PrintValues( myAL ); // Removes the element at index 5. myAL->RemoveAt( 5 ); // Displays the current state of the ArrayList. Console::WriteLine( "After removing the element at index 5:" ); PrintValues( myAL ); // Removes three elements starting at index 4. myAL->RemoveRange( 4, 3 ); // Displays the current state of the ArrayList. Console::WriteLine( "After removing three elements starting at index 4:" ); PrintValues( myAL ); } void PrintValues( IEnumerable^ myList ) { IEnumerator^ myEnum = myList->GetEnumerator(); while ( myEnum->MoveNext() ) { Object^ obj = safe_cast<Object^>(myEnum->Current); Console::Write( " {0}", obj ); } Console::WriteLine(); } /* This code produces the following output. The ArrayList initially contains the following: The quick brown fox jumped over the lazy dog After removing "lazy": The quick brown fox jumped over the dog After removing the element at index 5: The quick brown fox jumped the dog After removing three elements starting at index 4: The quick brown fox */
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.