39. 面向对象的LotusScript（十一）之导出Excel（三）

我们再来看一个模版型的报表的实例。

选择报表类型，输入参数：

产生的报表：

预先设计好的Excel模版以附件形式保存在配置文档中：

继承了Report基类的子类Report2的代码如下：

Public Class Report2 As Report
	Private intYear As Integer 
	Private intMonth As Integer 
	Private VIEW_REPORT As String
	Private offices As NArray
	Private acctTypes As NArray 

	Sub New(intYear As Integer, intMonth As Integer), Report()
		'设置报表的类型为模版型
me.reportType=REPORT_TYPE_TEMPLATE
'设定模版的名称
		me.Template="Report2"
		'接受用户选择的参数
		me.intYear=intYear
		me.intMonth=intMonth
		'指定要从其中取数据的视图
		me.VIEW_REPORT="vwRecord4Report2"
'Offices excluding SC & DG
		'初始化报表所需的办公室和科目等数据
		Set offices = New NArray(-1)
		Call offices.Import("03,04,02,05,01,08", ",")
		
		Set acctTypes = New NArray(-1)
		With acctTypes
			Call .Add("Fringe")
			Call .Add("Misc")
			Call .Add("Outside Services")
			Call .Add("Rent")
			Call .Add("Repair/Maintenance")
			Call .Add("Tax")
			Call .Add("Travel")
			Call .Add("Utilities")
			Call .Add("Wages")
		End With
		
	End Sub
	
	%REM
		Function ExportData
		Description: Comments for Function
	%END REM
	Private Function ExportData()
		'设置writer的模式为列模式
		writer.Mode=writer.Mode_column
		Call writer.MoveTo(5, 1)
		'将月份数字转换成英文的月份名称
		Dim converter As New Monthconverter()
		writer.WriteCell("Y-T-D as of " & converter.Getname(me.intMonth) & " " & me.intYear)
		
		'Dim view As NotesView 
		'Set view=db.Getview("vwRecord4Report2")
		'05 ,06,03,04,02,05,01,08
		'将writer移动到指定的区域
		Call writer.MoveTo(40, 2)
		'设置writer换列时的上界
		writer.TopBound=40
		'调用方法WriteTable()写报表的一部分
		Call me.WriteTable(me.intYear, "Actual")
		
		Call writer.MoveTo(56, 2)
		writer.TopBound=56
		Call me.WriteTable(me.intYear-1, "Actual")
		
		Call writer.MoveTo(87, 2)
		writer.TopBound=87
		Call me.WriteTable(me.intYear, "Budget")
	End Function
	
	%REM
		Function WriteTable
		Description: Write a table region in the report
	%END REM
	Private Function WriteTable(intYear As Integer, amtType As String )
		Dim keys(4) As String
		keys(0)=CStr(intYear)
		keys(1)=amtType
		Dim total As Double
		
		'Write values of SC & DG
		'Dim total2 As Variant
		ForAll t In acctTypes.container
			keys(3)=t
			keys(2)="05 "
			total=me.GetYTDAmount(keys)
			
			keys(2)="06"
			total=total+me.GetYTDAmount(keys)
			writer.WriteCell(total)
		End ForAll
		'Write values of other offices
		ForAll o In offices.container
			Call writer.NextColumn()
			ForAll t In acctTypes.container
				keys(2)=o
				keys(3)=t
				total=me.GetYTDAmount(keys)
				writer.WriteCell(total)
			End ForAll
			
		End ForAll
	End Function
	
	%REM
		Function GetYTDAmount
		Description: Get the YTD amount in accordance with the conditions
		in the provided keys
	%END REM
	Private Function GetYTDAmount(keys As Variant) As Double
		Dim total As Double, amt As Variant
		Dim i As Integer
		For i=1 To me.intMonth
			keys(4)=CStr(i)
			amt=GetTotal(me.VIEW_REPORT, keys, 0, "")
			If Not IsEmpty(amt) Then
				total=total+amt
			End If
		Next
		GetYTDAmount=total
	End Function
End Class

这个报表里有很多个表格区域，有些需要写入数据，有些则通过预设的公式计算出结果。在上面的代码中，ExportData()方法使用专门的写Excel工作表的类SheetWriter（将在下一篇文章中详细介绍）的实例writer，移动到各个表格区域，再调用WriteTable()方法写入数据。而WriteTable()方法利用在23. 在LotusScript中利用视图的合计功能求和一文中介绍过的GetTotal()函数读取视图的汇总列以获得报表所需的统计数据。代码里还应用了20. 面向对象的LotusScript（三）之NArray里介绍的Narray和21. 面向对象的LotusScript（四）之MonthConverter介绍的MonthConverter。