how to make a datatable without case sensitive and show the result with only 4-5 char

[axel48]

I've a filter, a datatable linked with a listbox and if statements, now i need to know, how can i say to program, when user search on datatable to don't care if a word is written with an upcase or lowcase character, and show the result when a few words at least is written into texbox? (like 4 or 5)

This is the code:

 Private Sub TextBox1_TextChanged(sender As Object, e As EventArgs) Handles TextBox1.TextChanged
        Dim dvtest As New DataView
        dvtest = dttest.DefaultView
        dvtest.RowFilter = "test Like '%" + TextBox1.Text + "%'"
        If dttest.Rows.Count >0 <2 Then
            For counter As Integer = 0 To dttest.Rows.Count < 3
                If dttest.Rows(0).Item(0).ToString = TextBox1.Text Then
.....
End If

UPDATE
I resolved it with this code, wasn't very hard sorry:

TextBox1.Text = Globalization.CultureInfo.CurrentCulture.TextInfo.ToTitleCase(TextBox1.Text)
        TextBox1.SelectionStart = TextBox1.TextLength

Now i want to know, how i can show the result of an if statement with at least 2 or 5 words without trim the left text ? I tried with this code:

dttest.Rows(0).Item(0).ToString.ToLower.StartsWith(TextBox1.Text.ToLower)

But with this, the Item of that row disappear, and only with a letter(wrong one), show the picture of that if(but i like the user just put 3 or 4 words for show the result of the if (the same of that row value without trim the others, to show the picture)

[jmcilhinney]

The String.Equals, String.StartsWith and String.EndsWith methods are all overloaded and allow you to specify whether the comparison should be case-sensitive or case-insensitive. You never need to change the case of anything in order to compare.

[TnTinMN]

For the originally asked question see: DataTable.CaseSensitive Property