如何将记录计入访问表单的文本框中

Question

我有一个访问表，我按日期范围搜索。在表单中我有一个文本框TxtTotal，我想显示过滤范围内的代码我有的代码。继续给我完整的记录数，而不是过滤范围。

这是我的模块

Function FindRecordCount(strSQL As String) As Long
     Dim db As Database
     Dim rstRecords As Recordset

'On error GoTo ErrorHandler
            Set db = CurrentDb
            Set rstRecords = db.OpenRecordset("TblPurchases")
    If rstRecords.EOF Then
    FindRecordCount = 0
Else
    rstRecords.MoveLast
    FindRecordCount = rstRecords.RecordCount

End If
   rstRecords.Close
   db.Close
Set rstRecords = Nothing
Set db = Nothing
End Function

这是我在表单上的TxtTotal文本框的代码

   Sub Search()
   Dim strCriteria, task As String

      Me.Refresh
     If IsNull(Me.TxtPurchaseDateFrom) Or IsNull(Me.TxtPurchaseDateTo) 
 Then
   MsgBox "Please enter the date range", vbInformation, "Date Range 
   Required"
    Me.TxtPurchaseDateFrom.SetFocus
  Else
    strCriteria = "([Date of Purchase] >= #" & Me.TxtPurchaseDateFrom & 
   "# and [Date of Purchase] <= #" & Me.TxtPurchaseDateTo & "#)"
    task = "select * from TblPurchases where( " & strCriteria & ") order 
    by [Date of Purchase] "
   DoCmd.ApplyFilter task
    Me.TxtTotal = FindRecordCount(task)
End If

结束子

结果不断给我完整的记录数，而不是过滤范围。

Answer 1

我认为主要问题是这一行：

Set rstRecords = db.OpenRecordset("TblPurchases")

您正在设置记录集以使用表作为其源而不是SQL字符串。无论您的输入日期是什么，如果您正在查看整个表格，它将返回整个表格xD。

至于从查询结果中查找项目的总数，使用SQL COUNT函数可能是有意义的，例如：SELECT COUNT(<Column>) FROM <table> WHERE <criteria>;这将为您提供从该查询提供的数据条目的数量。

我还建议使用QueryDef对象作为SQL定义，因为它使事情变得更清晰。但同样，这只是一个推荐EG：

Function FindRecordCount(dateFrom As Date, dateTo As Date) As Long
    Dim db As DAO.Database
    Dim QDF As DAO.QueryDef
    Dim rstRecords As DAO.Recordset
    Dim SQL As String

    SQL = "SELECT COUNT(*) FROM TblPurchase WHERE([Date of Purchase] >= #@dateFrom# AND [Date of Purchase] <= #@dateTo#)"

    Set db = CurrentDb
    Set QDF = db.QuerDefs(SQL)
    QDF.Paramaters("@dateFrom").Value = dateFrom
    QDF.Paramaters("@dateTo").Value = dateTo

    Set rstRecords = QDF.OpenRecordset("TblPurchases")

    If rstRecords.EOF Then
        FindRecordCount = 0
    Else
        rstRecords.MoveLast
        FindRecordCount = rstRecords.RecordCount
    End If

    rstRecords.Close
    QDF.Close
    db.Close
    Set rstRecords = Nothing
    Set QDF = Nothing
    Set db = Nothing
End Function

最好的祝福。

Answer 2

您可以使用文本框txtTotal的ControlSource中的DCount表达式替换所有这些：

=DCount("*","TblPurchase ","[Date of Purchase] Between #" & Format(Nz(Me!TxtPurchaseDateFrom.Value,Date()), "yyyy\/mm\/dd") & "# And #" & Format(Nz(Me!TxtPurchaseDateTo.Value,Date()), "yyyy\/mm\/dd") & "#")