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Tip of the Day
Language: VB7
Expertise: beginner
Dec 23, 2002

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ConcatenateStrings - Concatenating an array of strings

' Concatenate the input strings, and return the resulting string. The first 
' input string is used as a separator.
'
' Example:
'   Dim i As Integer = 4
'   Dim d As Double = 34.45
'   Dim s As String = "VB-2-The-Max"
'   Dim ret As String = ConcatenateStrings(" ", s, "is a nice site, ins't it?",
'  "It has been online for", i, "years.", "Just test the function with a Double 
' now:", d)
'   MessageBox.Show(ret)

Function ConcatenateStrings(ByVal sep As String, ByVal ParamArray args() As _
    Object) As String
    Dim builder As New System.Text.StringBuilder()
    ' add each item of the input array to the StringBuilder's string
    Dim o As Object
    For Each o In args
        If builder.Length > 0 Then
            ' add the separator if this is not the first item we add
            builder.Append(sep)
        End If
        builder.Append(o)
    Next
    ' return the final string
    Return builder.ToString()
End Function

' If all arguments are strings, then the following method is simpler and faster:

Function ConcatenateStrings2(ByVal sep As String, ByVal ParamArray args()
As String) As String
    Return String.Join(sep, args)
End Function
Marco Bellinaso
 
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