Sorting in Arrays using VB.NET
In this article I will explain you about Sorting in Arrays using VB.NET.
As my
previous
article explain Reversing, and Searching of array. This article is all about
the sophisticated example of using the IComparer interface and Sort function
together. The IComparer interface allows you to define a Compare method in order
to do a comparison between two elements of your array. This Compare method is
called repeatedly by the Sort function in order to sort the array. The example
given below defines a Compare method that does a comparison between two strings.
Example of Array Sorting
' sort an array
according to the Nth element
Imports
System.Collections
Module
Module1
Public
Class
CompareX
Implements
IComparer
Private
compareFrom As
Integer
= 0
Public
Sub
New(ByVal
i As
Integer)
compareFrom = i
End
Sub
Public
Function
Compare(ByVal
a As
Object,
ByVal
b As
Object)
As
Integer
Implements
IComparer.Compare
Return
[String].Compare(a.ToString().Substring(compareFrom),
b.ToString().Substring(compareFrom))
End
Function
End
Class
Public
Class
ArrListEx
Shared
Sub
Main(ByVal
args As
String())
Dim
arr As
New
ArrayList()
arr.Add("aaaa9999")
arr.Add("bbbb8888")
arr.Add("cccc7777")
arr.Add("dddd6666")
arr.Sort(New
CompareX(4))
Dim
arrList As
IEnumerator
= arr.GetEnumerator()
While
arrList.MoveNext()
Console.WriteLine("Item:
{0}", arrList.Current)
End
While
Console.ReadLine()
End
Sub
End
Class
End
Module
The program in above example,
has this output
Conclusion
Hope this article would have helped you in understanding how we Using IComparer
interface and sort function together in VB.NET.