VB.NET 1.1 - efficient way to search in an array List of objects

Posted on 2009-05-13
Last Modified: 2013-11-07
-------------------------------------------------------------------------------------------------------------------------------- 1.1 -Searching an object item inside an array list of objects
Is there an efficient and fast way to search an object item inside an array list of objects in .net 1.1? In details&..
I have a class like (See Code Below) -
Public Class MyClass1
    Private MyID As String = ""
    Private MyName As String = ""
    Private MyAddress As String = ""
    Public Property ID() As String
            Return MyID
        End Get
        Set(ByVal Value As String)
            MyID = Value
        End Set
    End Property
    Public Property Name() As String
            Return MyName
        End Get
        Set(ByVal Value As String)
            MyName = Value
        End Set
    End Property
    Public Property Address() As String
            Return MyAddress
        End Get
        Set(ByVal Value As String)
            MyAddress = Value
        End Set
    End Property
End Class
And I want to search by Name say 'MyFirstName' from an array list of objects of type MYClass1 as -
 Dim arrlMyClass1 As ArrayList		'a large array list of objects of type MyClass1
 Dim objMyObject As New MyClass1
 Dim MyID As String = ""
 For Each objMyObject In arrlMyClass1
     If Trim(LCase("MyFirstName")) = Trim(LCase(objMyObject.Name)) Then
        MyID = objMyObject.ID
        Exit For
     End If
I am looking for an efficient search method to replace the above to search an object by item Name - say 'MyFirstname'. The For each loop is taking a lot of time if the array list is large.

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Question by:Gurunathans
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1 Comment
LVL 10

Accepted Solution

MaxOvrdrv2 earned 500 total points
ID: 24376139
because you declared it as a class, there is no efficient way of doing that...

however, you could always define a function in your class that does it for you.. something like this:
Public Class MyClass1
Public Function Find(ByVal Lst AS ArrayList, ByVal FN AS String) As String
Dim Itm AS ListItem
Dim retval as String
For Each Itm In arrlMyClass1
If Trim(LCase(FN)) = Trim(LCase(Itm.Name)) Then
  retval="Person Found!"
End If
if retval="" then
  return "Not Found!"
  return retval
end if
End function

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