Question

Public Function StartTableCell( _
  Optional ByVal align As String = "", _
  Optional ByVal valign As String = "", _
  Optional ByVal colspan As String = "", _
  Optional ByVal rowspan As String = "", _
  Optional ByVal width As String = "", _
  Optional ByVal height As String = "") As String

    Dim _StrBuil As New StringBuilder()

End Function

How can I display the values from the arguments where the caller has passed in a value? For example if align is "" it should not be displayed.

Answer 1

The simplest way to do this is to check each argument and build up the StringBuilder one by one.

For example:

Dim _StrBuil As New StringBuilder()
If Not String.IsNullOrEmpty(align)
    _StrBuil.Append(("align: """ + align + """")
End If
If Not String.IsNullOrEmpty(valign)
    _StrBuil.Append(("valign: """ + valign + """")
End If 
'etc.  
Return "<td " + _StrBuil.ToString + ">"