How to get the index of element from contains function of array in vb.net

Question

i have a list of large number of string elements in array and i am using contains function to check if it contains that element. it is working fine. Now i want to get to know the index/position of element. suppose the array is

dim s as string() = {"first", "second","third"}

and the string

dim l as string = "third"

method

dim b as boolean = s.Contains(l, StringComparer.CurrentCultureIgnoreCase)

flag

if (b) Then
messagebox.show("It exists") 
end if

above array is just an example. original array consists of 7690 entries and each entry is written in utf-8 and indexOf function is not giving any result

If the array does contains your string, it also should be able to give you the string's index. — Eminem
– Eminem, Commented Apr 6, 2015 at 12:12

Eminem · Accepted Answer · 2015-04-06 12:09:50Z

0

First of all, you should consider using a List(Of T) when writing in VB.Net.

The List class provides an List(Of T).IndexOf Method (T).

You can do something like this :

Dim index As Integer = YourList.IndexOf(l)

answered Apr 6, 2015 at 12:09

Eminem

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ChicagoMike · Accepted Answer · 2015-04-06 12:14:52Z

0

I believe you're looking for the IndexOf function.

UPDATE: I came up with the following quick example that encoded a string similar to your example string into UTF-8 and it still works:

    Dim s As String() = {"first", "second", "third", "four", "five", "six"}

    For Each tempString As String In s
        Dim bytes As Byte() = Encoding.Default.GetBytes(tempString)
        tempString = Encoding.UTF8.GetString(bytes)
    Next

    Dim l As String = "six"
    Debug.Print(Array.IndexOf(s, l))

edited Apr 6, 2015 at 12:14

answered Apr 6, 2015 at 12:04

ChicagoMike

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1 Comment

Sahil Manchanda Over a year ago

sort of. indexOf function doesn't work. I am currently working with a array of 7690 entries and each entry/string is in utf-8 format

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