如果字串中有數字，想取出字串中的數字的話，可使用下列方式
如果字串中有數字，想取出字串中的數字的話，可使用下列方式：
1 
Dim str As String = "abc123def"
2Dim str2 As String = Regex.Replace(Str, "[^0-9_]*", "")
Dim str As String = "abc123def" 2
Dim str2 As String = Regex.Replace(Str, "[^0-9_]*", "")
Str2會等於123
但如果為下列形式字串，則會把數字都黏在一起，要注意！
1 Dim str As String = "abc123def456ghi"
2Dim str2 As String = Regex.Replace(Str, "[^0-9_]*", "")
Dim str As String = "abc123def456ghi" 2
Dim str2 As String = Regex.Replace(Str, "[^0-9_]*", "")Str2會等於123456