"" Then Me.销售额图表.Visible = True Else Me.销售额图表.Visible = False End If End Sub Private Sub 年份_Change() If Me.年份 <> "" And Me.月份 <> "" Then Me.销售额图表.Visible = True Me.销售额图表.Requery Me.销售额图表.ChartTitle = 年份 & "年" & Me.月份 & "月销售额" Else Me.销售额图表.Visible = False End If End Sub Private Sub 月份_Change() If Me.年份 <> "" And Me.月份 <> "" Then Me.销售额图表.Visible = True Me.销售额图表.Requery Me.销售额图表.ChartTitle = 年份 & "年" & Me.月份 & "月销售额" Else Me.销售额图表.Visible = Fa" />
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