[VB 2008] Ignore capital and non-capital letters in string.Contains

2010-03-06

Question

_{Saturday, March 6, 2010 11:07 AM}

Hi,

I use for example:

Dim S As String = TextBox1.Text
if(S.Contains("BlaBla") Then
        ' ..
End If

But when I use blabla in my textbox it doesn't work..
How Can I ignore the capital letter or non-capital letter function?

Regards,

All replies (6)

_{Saturday, March 6, 2010 12:26 PM ✅Answered}

Hi,

I use for example:
Dim


 S As


 String


 = TextBox1.Text
if


(S.Contains("BlaBla"


) Then



        ' ..



End


 If
But when I use blabla in my textbox it doesn't work..
How Can I ignore the capital letter or non-capital letter function?

Regards,

You can change the case of the text in the textbox before making the comparison. Change the text to either Upper or Lower case with:

Dim S As String = TextBox1.Text.ToUpper

Or with:

Dim S As String = TextBox1.Text.ToLower

Then check with:

If S.Contains("BLABLA") Then ' if you converted TextBox text to upper case

If S.Contains("blabla") Then ' if you converted TextBox text to lower case

Or you can convert and test in the same line based on which case you want to use. If you want upper case:

If S.ToUpper.Contains("BLABLA") Then

If you want lower case:

If S.ToLower.Contains("blabla") Then

Doug

SEARCH ... then ask

_{Saturday, March 6, 2010 4:23 PM ✅Answered | 1 vote}

Thanks, I know ToUpper and ToLower but what if I use B laB la? Isn't there a possibility to disable the case sensitivity..?

Regards,

You can try using Option Compare Text

** Doug

SEARCH ... then ask

_{Saturday, March 6, 2010 4:50 PM ✅Answered}

If S.ToUpper.Contains("BLAbLa".ToUpper) ThenSuccess
Cor

_{Sunday, March 7, 2010 2:06 AM ✅Answered}

One more preferred method is following

    Dim S As String = TextBox1.Text
        If "BlaBla".IndexOf(S, StringComparison.OrdinalIgnoreCase) >= 0 Then
            MessageBox.Show("Exist")
        End If

If you are comparing after making them same case then use ToUpper as Cor has shown instead of ToLower since ToLower does not work correctly in some situation

If you are thinking what all these means, then read

http://blogs.msdn.com/michkap/archive/2004/12/29/344136.aspx

Arjun Paudel

_{Saturday, March 6, 2010 2:02 PM}

Thanks, I know ToUpper and ToLower but what if I use B laB la? Isn't there a possibility to disable the case sensitivity..?

Regards,

_{Sunday, March 7, 2010 10:27 AM}

Hi,

Thanks for answers, works perfect now.

Regards,

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[VB 2008] Ignore capital and non-capital letters in string.Contains

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All replies (6)

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