【VB.NET】正規表現 Regexクラス

サンプル

Protected Sub Button1_Click(sender As Object, e As EventArgs) Handles Button6.Click
    '浮動小数点数か調べる 
    If Regex.IsMatch(Me.TextBox3.Text, "^[\-+]?[0-9]*\.?[0-9]+$") Then
        Me.Label1.Text = String.Format("{0}は浮動小数点数です。", _
                                         Me.TextBox3.Text)
    Else
        Me.Label1.Text = "Error..."
    End If
End Sub

参考文献

http://dobon.net/vb/dotnet/vb2cs/isnumeric.html
http://park5.wakwak.com/~weblab/tipsSeikiHyogen5.html