ArrayList.ToArray Method (Type)
.NET Framework (current version)
Copies the elements of the ArrayList to a new array of the specified element type.
Assembly: mscorlib (in mscorlib.dll)
Parameters
- type
-
Type:
System.Type
The element Type of the destination array to create and copy elements to.
Return Value
Type: System.ArrayAn array of the specified element type containing copies of the elements of the ArrayList.
| Exception | Condition |
|---|---|
| ArgumentNullException | type is null. |
| InvalidCastException | The type of the source ArrayList cannot be cast automatically to the specified type. |
All of the objects in the ArrayList object will be cast to the Type specified in the type parameter.
The elements are copied using Array.Copy, which is an O(n) operation, where n is Count.
The following copy example shows how to copy the elements of an ArrayList to a string array.
Imports System Imports System.Collections Public Class SamplesArrayList Public Shared Sub Main() ' Creates and initializes a new ArrayList. Dim myAL As New 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 values of the ArrayList. Console.WriteLine("The ArrayList contains the following values:") PrintIndexAndValues(myAL) ' Copies the elements of the ArrayList to a string array. Dim myArr As String() = CType(myAL.ToArray(GetType(String)), String()) ' Displays the contents of the string array. Console.WriteLine("The string array contains the following values:") PrintIndexAndValues(myArr) End Sub 'Main Overloads Public Shared Sub PrintIndexAndValues(myList As ArrayList) Dim i As Integer = 0 Dim o As [Object] For Each o In myList Console.WriteLine(" [{0}]: {1}", i, o) i = i + 1 Next o Console.WriteLine() End Sub 'PrintIndexAndValues Overloads Public Shared Sub PrintIndexAndValues(myArr() As String) Dim i As Integer For i = 0 To myArr.Length - 1 Console.WriteLine(" [{0}]: {1}", i, myArr(i)) Next i Console.WriteLine() End Sub 'PrintIndexAndValues End Class 'SamplesArrayList 'This code produces the following output. ' 'The ArrayList contains the following values: ' [0]: The ' [1]: quick ' [2]: brown ' [3]: fox ' [4]: jumped ' [5]: over ' [6]: the ' [7]: lazy ' [8]: dog ' 'The string array contains the following values: ' [0]: The ' [1]: quick ' [2]: brown ' [3]: fox ' [4]: jumped ' [5]: over ' [6]: the ' [7]: lazy ' [8]: dog
Universal Windows Platform
Available since 10
.NET Framework
Available since 1.1
Available since 10
.NET Framework
Available since 1.1
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