Visual Basic实现动态报表

Dim i As Integer
Const wordwidth As Integer = 201 '五号字的宽度为201缇
For i = 0 To lst.ListCount - 1
Select Case lst.List(i)
Case "序号"
lst.ItemData(i) = wordwidth * 3
Case "股票代号"
lst.ItemData(i) = wordwidth * 5
Case "股票名称"
lst.ItemData(i) = wordwidth * 6
Case "收盘价"
lst.ItemData(i) = wordwidth * 5
Case "涨跌"
lst.ItemData(i) = wordwidth * 4
Case "最高价"
lst.ItemData(i) = wordwidth * 5
Case "最低价"
lst.ItemData(i) = wordwidth * 5
Case "成交量"
lst.ItemData(i) = wordwidth * 4
End Select
Next i
End Sub
'******************************************************************

　　4．设置Datareport窗体属性，控制输出格式

　　设置Datareport窗体的属性，控制输出格式也可用一子过程完成，需要说明的是为Datareport和数据控件设置属性时，在设计编码过程中，Visual Basic多数不出现正常情况下的智能提示，不必大惊小怪，完整代码如下。

'***********************************************************************
'设置报表窗体各种参数，控制输出格式
Private Sub setDatareport(lst As ListBox, dtr As Datareport, scaption As String)
Dim leftpos As Long 'leftpos为存放控件left属性的变量
Dim reportwidth As Long 'reportwidth为存放Datareport总宽度的变量
Dim i As Integer

'求总宽度
For i = 0 To lst.ListCount - 1
reportwidth = reportwidth lst.ItemData(i)
Next
'初始化
With dtr
'设置数据源，页边距，标题，横向分割线，section1、2区第一条竖分割线
.LeftMargin = 1440
.RightMargin = 1440
.TopMargin = 1440
.BottomMargin = 144
.reportwidth = Printer.Width - 2880 - 20
Set .DataSource = rs 'rs为ADODB数据源
.Sections("section4").Controls.Item("label41").Caption = scaption
.Sections("section4").Controls.Item("label41").Width = reportwidth
.Sections("section4").Controls.Item("label42").Width = reportwidth
.Sections("section2").Controls.Item("line_2").Width = reportwidth
.Sections("section2").Controls.Item("line2").Width = reportwidth
.Sections("section1").Controls.Item("line1").Width = reportwidth
.Sections("section2").Controls.Item("line20").Left = 0
.Sections("section1").Controls.Item("line10").Left = 0
End With

'为section1，2区设置数据
leftpos = 0
For i = 0 To lst.ListCount - 1
dtr.Sections("section2").Controls.Item("label1" & (i 1)).Caption = lst.List(i)
dtr.Sections("section2").Controls.Item("label1" & (i 1)).Width = lst.ItemData(i)
dtr.Sections("section2").Controls.Item("label1" & (i 1)).Left = leftpos
dtr.Sections("section1").Controls.Item("text1" & (i 1)).DataField = lst.List(i)
dtr.Sections("section1").Controls.Item("text1" & (i 1)).Width = lst.ItemData(i)
dtr.Sections("section1").Controls.Item("text1" & (i 1)).Left = leftpos
dtr.Sections("section2").Controls.Item("line2" & (i 1)).Left = leftpos lst.ItemData(i)
dtr.Sections("section1").Controls.Item("line1" & (i 1)).Left = leftpos lst.ItemData(i)
leftpos = leftpos lst.ItemData(i)
'特殊字段的格式特殊处理
If lst.List(i) = "收盘价" Or lst.List(i) = "最低价" Or lst.List(i) = "最高价" Then
dtr.Sections("section1").Controls.Item("text1" & (i 1)).DataFormat.Format = "￥#,##0.00"
End If
If lst.List(i) = "涨跌" Then
dtr.Sections("section1").Controls.Item("text1" & (i 1)).DataFormat.Format = "#,##0.00"
End If
If lst.List(i) = "成交量" Then
dtr.Sections("section1").Controls.Item("text1" & (i 1)).DataFormat.Format = "#,##0"
End If
Next i

'对不用的text控件必须设置其datafield属性，如lst.List(0)，否则出错,但一定让其不可见
'其他不用的label,line控件同样均不可见
i = lst.ListCount
While i < (dtr.Sections("section1").Controls.Count - 10)
'10 为section1区域的非text控件的控件总数
i = i 1
dtr.Sections("section1").Controls.Item("text1" & i).DataField = lst.List(0)
dtr.Sections("section1").Controls.Item("text1" & i).Visible = False
dtr.Sections("section2").Controls.Item("line2" & i).Visible = False
dtr.Sections("section1").Controls.Item("line1" & i).Visible = False
dtr.Sections("section2").Controls.Item("text1" & i).Visible = False
Wend
End Sub
'******************************************************************************

　　5．报表输出

　　报表输出是在单击"输出报表"按钮(cmd_report)完成的，代码如下。

'*******************************************************************************
Private Sub cmd_report_Click()
If lst_selected.ListCount <> 0 Then
Call fieldwidth(lst_selected) '设置字段宽度
Call setdatareport(lst_selected, Dtreport, Trim$(txt_caption)) '设置报表属性

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