Arrays to check duplicates in vb.net

Hi,

How to check if array has a string.Three checks on Uppercase,mixed case and lowercase.

 If IsDBNull(SQLdr(StrCol1)) = False Then
                    StrColval1 = SQLdr(StrCol1).ToString
                    StrColval1 = StrColval1.Trim
                    If StrColval1 <> String.Empty Then
                        If Not (Arr1.Contains(StrColval1)) Then
                            If Not Arr1.Contains(StrColval1.ToLower) Then
                                Arr1.Add(StrColval1)
                            End If
                        End If
                        End If
                End If

Any better way of doing this?
RIASAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

PawełI Design & Develop SoftwareCommented:
yes use the following
https://msdn.microsoft.com/en-us/library/zkcaxw5y(v=vs.110).aspx

loop through your array and just compare once

Dim myString =""
For Each lstString As String In lst
    if(String.Compare(myString, lstString, true))
    'found string

   end if
Next
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
RIASAuthor Commented:
Paweł,
Cheers! Any suggestion how can i use it my code...
0
PawełI Design & Develop SoftwareCommented:
check the comment again, i added a snippet, be weary of the syntax, it's been a long time since i've used Visual Basic.
0
Angular Fundamentals

Learn the fundamentals of Angular 2, a JavaScript framework for developing dynamic single page applications.

RIASAuthor Commented:
Thanks!
0
wsh2Commented:
Air-coded:
 
Dim strFind as string = "abc"
Dim str1st As String = "ABCd, abcd, AbCd)
Dim str2nd As String
'
str2nd = str1st.Upper.Replace(strFind.Upper, "")
MsgBox _
   ((str1st.Length - str2nd.Length) / str1st.Length).ToString & " occurences found"
1
wsh2Commented:
Air-coded:
 
Dim strFind as string = "abc"
Dim str1st As String = "ABCd, abcd, AbCd)
Dim str2nd As String
'
str2nd = str1st.Upper.Replace(strFind.Upper, "")
MsgBox _
   ((str1st.Length - str2nd.Length) / str1st.Length).ToString & " Occurences Found"
1
wsh2Commented:
Correction:

Dim strFind as string = "abc"
Dim str1st As String = "ABCd, abcd, AbCd)
Dim str2nd As String
'
If strFind.Length > 0 Then
    str2nd = str1st.Upper.Replace(strFind.Upper, "")
    MsgBox _
       ((str1st.Length - str2nd.Length) / strFind.Length).ToString & " Occurences Found"
End If
1
RIASAuthor Commented:
Cheers!
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Visual Basic.NET

From novice to tech pro — start learning today.