ArrayList.GetRange Method (Int32, Int32)
Assembly: mscorlib (in mscorlib.dll)
Parameters
- index
-
Type:
System.Int32
The zero-based ArrayList index at which the range starts.
- count
-
Type:
System.Int32
The number of elements in the range.
Return Value
Type: System.Collections.ArrayListAn ArrayList which represents a subset of the elements in the source ArrayList.
| 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. |
This method does not create copies of the elements. The new ArrayList is only a view window into the source ArrayList. However, all subsequent changes to the source ArrayList must be done through this view window ArrayList. If changes are made directly to the source ArrayList, the view window ArrayList is invalidated and any operations on it will return an InvalidOperationException.
This method is an O(1) operation.
The following code example shows how to set and get a range of elements in the ArrayList.
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") ' Creates and initializes the source ICollection. Dim mySourceList As New Queue() mySourceList.Enqueue("big") mySourceList.Enqueue("gray") mySourceList.Enqueue("wolf") ' Displays the values of five elements starting at index 0. Dim mySubAL As ArrayList = myAL.GetRange(0, 5) Console.WriteLine("Index 0 through 4 contains:") PrintValues(mySubAL, vbTab) ' Replaces the values of five elements starting at index 1 with the values in the ICollection. myAL.SetRange(1, mySourceList) ' Displays the values of five elements starting at index 0. mySubAL = myAL.GetRange(0, 5) Console.WriteLine("Index 0 through 4 now contains:") PrintValues(mySubAL, vbTab) End Sub 'Main Public Shared Sub PrintValues(myList As IEnumerable, mySeparator As Char) Dim obj As [Object] For Each obj In myList Console.Write("{0}{1}", mySeparator, obj) Next obj Console.WriteLine() End Sub 'PrintValues End Class 'SamplesArrayList ' This code produces the following output. ' ' Index 0 through 4 contains: ' The quick brown fox jumped ' Index 0 through 4 now contains: ' The big gray wolf jumped
Available since 10
.NET Framework
Available since 1.1