從VB6向MS Access插入訂單

Question

我得到了我們用於培訓管理的舊VB應用程序之一。它是用VB6編寫的，數據庫是MsAccess。 當我使用該應用程序時，在保存培訓課程的同時，所有記錄都保存在以前的記錄之間（不按順序）。 它不會被添加到最后一行。 該應用程序還從數據庫中獲取數據並在gridview中顯示。 因此，最終的顯示將以未排序的方式進行。就像我使用表單添加的最新數據一樣，顯示在中間行的某些位置。 當我看到數據庫表時，所有新數據都添加到中間行中。 在這里，我將顯示代碼：

sql = "INSERT INTO TrAssignment (BatchID,Category,CourseNumber,CourseTitle,FromDate,ToDate,Duration,Location, Trainer, FixedCost,DefaultStudentCost) VALUES ('" & CStr(txtBatchid.Text) & "','" & CStr(cmbCrscategory) & "','" & CStr(sCourNo) & "', '" & CStr(sCourTitle) & "','" & SchfromDTPick.Value & "','" & SchtoDTPicker.Value & "','" & CStr(txtSchduration.Text) & "','" & cmbLocation & "','" & CStr(cmbTrainer) & "','" & CStr(Trim(txtFixedcost.Text)) & "','" & CStr(Trim(txtDefault.Text)) & "')"
                rs.Open sql, conn, adOpenDynamic, adLockOptimistic

日期格式也像dd-mm-yyyy一樣，對於某些記錄，日期也以這種精確格式保存。 但對於某些人來說，日期格式就像d / m / yyyy。 只是他們從日期控件中獲取日期，而無需格式化代碼。

Answer 1

您的日期格式錯誤。 通常，您可以從此功能中受益：

' Converts a value of any type to its string representation.
' The function can be concatenated into an SQL expression as is
' without any delimiters or leading/trailing white-space.
'
' Examples:
'   SQL = "Select * From TableTest Where [Amount]>" & CSql(12.5) & "And [DueDate]<" & CSql(Date) & ""
'   SQL -> Select * From TableTest Where [Amount]> 12.5 And [DueDate]< #2016/01/30 00:00:00#
'
'   SQL = "Insert Into TableTest ( [Street] ) Values (" & CSql(" ") & ")"
'   SQL -> Insert Into TableTest ( [Street] ) Values ( Null )
'
' Trims text variables for leading/trailing Space and secures single quotes.
' Replaces zero length strings with Null.
' Formats date/time variables as safe string expressions.
' Uses Str to format decimal values to string expressions.
' Returns Null for values that cannot be expressed with a string expression.
'
' 2016-01-30. Gustav Brock, Cactus Data ApS, CPH.
'
Public Function CSql( _
    ByVal Value As Variant) _
    As String

    Const vbLongLong    As Integer = 20
    Const SqlNull       As String = " Null"

    Dim Sql             As String
    Dim LongLong        As Integer

    #If Win32 Then
        LongLong = vbLongLong
    #End If
    #If Win64 Then
        LongLong = VBA.vbLongLong
    #End If

    Select Case VarType(Value)
        Case vbEmpty            '    0  Empty (uninitialized).
            Sql = SqlNull
        Case vbNull             '    1  Null (no valid data).
            Sql = SqlNull
        Case vbInteger          '    2  Integer.
            Sql = Str(Value)
        Case vbLong             '    3  Long integer.
            Sql = Str(Value)
        Case vbSingle           '    4  Single-precision floating-point number.
            Sql = Str(Value)
        Case vbDouble           '    5  Double-precision floating-point number.
            Sql = Str(Value)
        Case vbCurrency         '    6  Currency.
            Sql = Str(Value)
        Case vbDate             '    7  Date.
            Sql = Format(Value, " \#yyyy\/mm\/dd hh\:nn\:ss\#")
        Case vbString           '    8  String.
            Sql = Replace(Trim(Value), "'", "''")
            If Sql = "" Then
                Sql = SqlNull
            Else
                Sql = " '" & Sql & "'"
            End If
        Case vbObject           '    9  Object.
            Sql = SqlNull
        Case vbError            '   10  Error.
            Sql = SqlNull
        Case vbBoolean          '   11  Boolean.
            Sql = Str(Abs(Value))
        Case vbVariant          '   12  Variant (used only with arrays of variants).
            Sql = SqlNull
        Case vbDataObject       '   13  A data access object.
            Sql = SqlNull
        Case vbDecimal          '   14  Decimal.
            Sql = Str(Value)
        Case vbByte             '   17  Byte.
            Sql = Str(Value)
        Case LongLong           '   20  LongLong integer (Valid on 64-bit platforms only).
            Sql = Str(Value)
        Case vbUserDefinedType  '   36  Variants that contain user-defined types.
            Sql = SqlNull
        Case vbArray            ' 8192  Array.
            Sql = SqlNull
        Case Else               '       Should not happen.
            Sql = SqlNull
    End Select

    CSql = Sql & " "

End Function