Question

根据用户表单中用户的一些输入，我构建代码以根据定义的标准自动创建计算列。但是，我在字段表达式中收到语法错误，下面提供了代码。

Option Compare Database

Private Sub Calculate_Click()
  Dim db As Database
  Dim rs As Recordset
  Dim x As Integer
  Dim Months As Integer
  Dim WPmonthly As String ' field name for monthly written premium
  Dim runningDate As Date
  Dim useDateLower As Date
  Dim useDateUpper As Date
  Dim tdf As dao.TableDef
  Dim fld As dao.Field2


  Months = Me.YearsBack * 12 + Month(Me.ValDate)

  If Me.Period = "monthly" Then

    Set db = CurrentDb
    Set tdf = db.TableDefs("tblEPdata")

    For x = 1 To Months

      runningDate = Format(DateAdd("m", -x + 1, Me.ValDate), "mm yyyy")
      useDateLower = runningDate
      useDateUpper = Format(DateAdd("m", -x + 2, Me.ValDate), "mm yyyy")
      WPmonthly = "WP M" & Month(runningDate) & " " & Year(runningDate)
      Set fld = tdf.CreateField(UPRmonthly)
      fld.Expression = "iif([issuedate]<#" & useDateUpper & "#,iif([issuedate]>=#" & useDateLower & "#,[grossPremium]))" ' output gross premium if issue date is between usedateupper and usedatelower, otherwise 0
      tdf.Fields.Append fld
    Next

    MsgBox "added"

  End If

End Sub

Answer 1

iif没有足够的参数 - 它需要三个参数（参见here）：

IIf ( expr , truepart , falsepart )

根据您在代码中的评论判断，您需要：

"iif([issuedate]<#" & useDateUpper & "#,iif([issuedate]>=#" & useDateLower & "#,[grossPremium],0),0)"

或者你可以简化这个，例如到：

"iif([issuedate]<#" & useDateUpper & "# and [issuedate]>=#" & useDateLower & "#,[grossPremium],0)"

Answer 2

想出来。变量wpmonthly应该用于使用uprmonthly的地方。 uprmonthly没有定义。

干杯

使用vba和变量添加计算列

2 个答案: