需要高手帮忙关于store date into database

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无聊的silver

2010-8-26 01:03 PM

需要高手帮忙关于store date into database
我做到last step
下个星期要交report希望高手能帮忙

我放这个
Dim i As Integer = 0
            Dim sameDateFound As Boolean = False

            Do Until i > .CafeDataSet.Cafe.Rows.Count - 1 Or sameDateFound = True
                  If .CafeDataSet.Cafe.Rows(i).Item("Order Date") = dateAndTimeDate.ToString("dd/MM/yyyy") Then
                     sameDateFound = True
                  Else
                     sameDateFound = False
                     i += 1
                  End If
            Loop

可是出现这个
Operator '=' is not defined for type 'DBNull' and string "26-08-2010".
什么意思？
database 我的field type 我试过放 date ， text 也是出现这个问题
呜呜