从 VB6 向 MS Access 插入订单

Posted 2023-04-19

【中文标题】从 VB6 向 MS Access 插入订单

【英文标题】：Insert Order to MS Access from VB6

【发布时间】：2016-05-03 05:11:21

【问题描述】：

我有一个用于培训管理的旧 VB 应用程序。它是用 VB6 编写的，数据库是 MsAccess。 当我使用该应用程序时，在保存培训课程时，所有记录都保存在以前的记录之间（不按顺序）。它不会被添加到最后一行。还有应用程序从数据库中获取数据并将其显示在 gridview 中。所以最终的显示是未排序的。就像我使用表单添加的最新数据一样，显示在中间行的某个位置。 当我看到数据库表时，所有新数据都被添加到中间行。 这里我将显示代码：

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

表格中的日期格式也类似于 dd-mm-yyyy，对于某些记录，日期会以这种精确格式保存。但对于某些人来说，日期格式就像 d/m/yyyy。 只是他们从日期控件中获取日期，代码中没有格式。

【参考方案1】：

您的日期格式错误。一般来说，您可以从这个功能中受益：

' 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