HI, ALL
My question , i have a combobox, use drop and pop method ,and i set the datasource
UnitBindingSource..... i want to user entry the combobox , if the database is none , then do something.
So i want to user entry combobox text to compare combobox all data, how can i do?
i already try , but not ok

Dim check As Boolean = False
        For a = 0 To unitcount - 1

            If CmboPkgunit.Text = Trim(CmboPkgunit.Items(a).ToString()) Then
                check = True
            End If
        Next