將字串轉換（解析）為日期

如果你知道要轉換（解析）的字串的格式，你應該使用 DateTime.ParseExact

Dim dateString As String = "12.07.2003"
Dim dateFormat As String = "dd.MM.yyyy"
Dim dateValue As Date

dateValue = DateTime.ParseExact(dateString, dateFormat, Globalization.CultureInfo.InvariantCulture)

如果你不確定字串的格式，可以使用 DateTime.TryParseExact 並測試結果以檢視是否已解析：

Dim dateString As String = "23-09-2013"
Dim dateFormat As String = "dd-MM-yyyy"
Dim dateValue As Date

If DateTime.TryParseExact(dateString, dateFormat, Globalization.CultureInfo.InvariantCulture, DateTimeStyles.None, dateValue) Then
    'the parse worked and the dateValue variable now holds the datetime that was parsed as it is passing in ByRef
Else
    'the parse failed
End If