前面我们所讲的报表,不管简单的还是复杂的,都遵循这样一个流程:
开发人员事先做好模版——〉用户运行程序——〉用户选择相应条件——〉打印或预览帐票——〉程序把用户选择的数据填充到我们的模版上,然后显示
可以说,用户除了选择条件,控制显示的数据之外,能做的控制很少(除非把一些简单的控制放在条件里面)。
本节我就讲讲如何用AR的Designer控件,实现用户自定义帐票印刷。
比如,要打印如下数据:
Class: |
A |
AttendNo: |
1 |
Name: |
Tony |
Sex: |
Male |
当然我们可以先做好相应的模版,然后让用户选择数据就可以打印出来了。
但是,万一用户又需要一张类似的帐票,但需要把Name写在Class前面,那我们怎么办?
1)重新做一个。真是个好办法,下面的文章可以不用看了。
2)在用户的条件中加一个条件(比如一个radio button,先显示Class还是先显示Name),然后我们在模版里面判断一下这个条件,根据它来对模版进行相应的调整。
这种方法其实在我们项目也是常常用到的(比如判断显示subject的全称还是简称,就是在条件中放个Check box的条件,模版做相应判断)。
但在本例中却不适用,万一用户又要求把Class和AttendNo放一行上怎么办?用户的需求可是千变万化的。
3)用AR提供的Designer控件,可以实现用户自定义模版。
对于本例来说,用户可以自己把Class,name这些控件,拖到模版上,自己设定大小位置,然后打印。
ok,下面我们就来创建一个最简单的自定义帐票:
1,数据源如下:
Class |
AttendNo |
Name |
Sex |
A |
1 |
Tony |
male |
A |
2 |
Mary |
female |
A |
3 |
Tom |
male |
A |
4 |
Jack |
male |
A |
5 |
Smith |
male |
B |
1 |
John |
male |
B |
2 |
Li |
female |
B |
3 |
Zhang |
female |
B |
4 |
Wang |
male |
C |
1 |
Gong |
male |
C |
2 |
Tian |
female |
2,需要打印出来的帐票也超级简单,就是根据Class来换页的一张普通二维表:
page1:
Class |
AttendNo |
Name |
Sex |
A |
1 |
Tony |
male |
A |
2 |
Mary |
female |
A |
3 |
Tom |
male |
A |
4 |
Jack |
male |
A |
5 |
Smith |
male |
3,创建如下文件:
<!--[if !vml]-->
<!--[endif]-->
frmShowAR和前面几个例子一样,用来放view控件显示报表
test.mdb是数据源
ReportDesigner里面放Designer控件,让用户进行自定义操作
4,让我们来看ReportDesigner:
<!--[if !vml]-->
<!--[endif]-->
1)左侧放了个Designer控件:
<!--[if !vml]-->
<!--[endif]-->
2)右上放一些button控件,包括添加空白label,添加item,预览帐票的按钮。
3)右下放一个PropertyGrid控件,可以用来显示和修改Designer中所有控件的public property.
<!--[if !vml]-->
<!--[endif]-->
5,添加好几个控件之后,你可以先运行程序看看
<!--[if !vml]-->
<!--[endif]-->
哈哈,不错吧,在程序运行当中,你可以直接在模版上添加section了,和我们设计模版时完全一样,这下可以让用户自己来设计帐票了。
6,不过先在还不能在模版上增加控件。先在我们编写代码,使得可以在模版上创建控件,并且用PropertyGrid控件来修改这些控件的属性。最后通过Preview按钮预览帐票。
1)在模版上增加一个控件的方法:
先选中特定section (比如Detail,GroupFooter)
然后就可以用代码:
2)预览的实现,把当前Designer的模版传给frmShowAR,然后在frmShowAR中显示这个模版
ReportDesigner.vb
Private
Sub
btnPreview_Click(
ByVal
sender
As
System.Object,
ByVal
e
As
System.EventArgs)
Handles
btnPreview.Click
Dim
_frm
As
New
frmShowAR()
_frm.Report
=
Me
.Designer1.Report
_frm.ShowDialog(
Me
)
End Sub
frmShowAR.vb
完整代码如下:
Public
Class
ReportDesigner
#Region
"UI Event"
'
'' <summary>
'
'' Handles the Click event of the btnAddTextBox control.
'
'' </summary>
'
'' <param name="sender">The source of the event.</param>
'
'' <param name="e">The <see cref="System.EventArgs" /> instance containing the event data.</param>
'
'' <remarks></remarks>
'
'' <history>
'
'' [TonyGong] 3/8/2007 2:17 PM Created
'
'' </history>
Private
Sub
btnAddTextBox_Click(
ByVal
sender
As
System.Object,
ByVal
e
As
System.EventArgs)
Handles
btnAddTextBox.Click
If
Me
.listItem.SelectedIndex
=
-
1
Then
Return
End
If
Dim
arControl
As
New
DataDynamics.ActiveReports.TextBox
Select
Case
Me
.listItem.SelectedItem.ToString()
Case
"
Class
"
arControl.DataField
=
"
Class
"
Case
"
AttendNo
"
arControl.DataField
=
"
AttendNo
"
Case
"
Name
"
arControl.DataField
=
"
Name
"
Case
"
Sex
"
arControl.DataField
=
"
Sex
"
End
Select
Me
.addControlToReport(arControl)
End Sub
'
'' <summary>
'
'' Handles the Load event of the ReportDesigner control.
'
'' </summary>
'
'' <param name="sender">The source of the event.</param>
'
'' <param name="e">The <see cref="System.EventArgs" /> instance containing the event data.</param>
'
'' <remarks></remarks>
'
'' <history>
'
'' [TonyGong] 3/8/2007 2:17 PM Created
'
'' </history>
Private
Sub
ReportDesigner_Load(
ByVal
sender
As
Object
,
ByVal
e
As
System.EventArgs)
Handles
Me
.Load
Me
.PropertyGrid1.SelectedObject
=
Me
.Designer1
End Sub
'
'' <summary>
'
'' Designer1_s the selection changed.
'
'' </summary>
'
'' <remarks></remarks>
'
'' <history>
'
'' [TonyGong] 3/8/2007 2:17 PM Created
'
'' </history>
Private
Sub
Designer1_SelectionChanged()
Handles
Designer1.SelectionChanged
Me
.PropertyGrid1.SelectedObject
=
Me
.Designer1.Selection(
0
)
End Sub
'
'' <summary>
'
'' Handles the Click event of the btnAddLabel control.
'
'' </summary>
'
'' <param name="sender">The source of the event.</param>
'
'' <param name="e">The <see cref="System.EventArgs" /> instance containing the event data.</param>
'
'' <remarks></remarks>
'
'' <history>
'
'' [TonyGong] 3/8/2007 2:17 PM Created
'
'' </history>
Private
Sub
btnAddLabel_Click(
ByVal
sender
As
System.Object,
ByVal
e
As
System.EventArgs)
Handles
btnAddLabel.Click
Me
.addControlToReport(
New
DataDynamics.ActiveReports.Label)
End Sub
'
'' <summary>
'
'' Handles the Click event of the btnPreview control.
'
'' </summary>
'
'' <param name="sender">The source of the event.</param>
'
'' <param name="e">The <see cref="System.EventArgs" /> instance containing the event data.</param>
'
'' <remarks></remarks>
'
'' <history>
'
'' [TonyGong] 3/8/2007 2:17 PM Created
'
'' </history>
Private
Sub
btnPreview_Click(
ByVal
sender
As
System.Object,
ByVal
e
As
System.EventArgs)
Handles
btnPreview.Click
Dim
rpt
As
New
DataDynamics.ActiveReports.ActiveReport()
Dim
_stream
As
New
System.IO.MemoryStream()
Me
.Designer1.Report.SaveLayout(_stream)
_stream.Position
=
0
rpt.LoadLayout(_stream)
_stream.Close()
Dim
_frm
As
New
frmShowAR()
_frm.Report
=
rpt
_frm.ShowDialog(
Me
)
End Sub
#End Region
#Region
"Private Method"
'
'' <summary>
'
'' Adds the control to report.
'
'' </summary>
'
'' <param name="control">The control.</param>
'
'' <remarks></remarks>
'
'' <history>
'
'' [TonyGong] 3/8/2007 2:17 PM Created
'
'' </history>
Private
Sub
addControlToReport(
ByVal
control
As
DataDynamics.ActiveReports.ARControl)
Select
Case
Me
.Designer1.Selection(
0
).GetType.FullName
Case
GetType
(DataDynamics.ActiveReports.Detail).FullName
CType
(
Me
.Designer1.Selection(
0
), DataDynamics.ActiveReports.Detail).Controls.Add(control)
Case
GetType
(DataDynamics.ActiveReports.PageHeader).FullName
CType
(
Me
.Designer1.Selection(
0
), DataDynamics.ActiveReports.PageHeader).Controls.Add(control)
Case
GetType
(DataDynamics.ActiveReports.PageFooter).FullName
CType
(
Me
.Designer1.Selection(
0
), DataDynamics.ActiveReports.PageFooter).Controls.Add(control)
Case
GetType
(DataDynamics.ActiveReports.GroupHeader).FullName
CType
(
Me
.Designer1.Selection(
0
), DataDynamics.ActiveReports.GroupHeader).Controls.Add(control)
Case
GetType
(DataDynamics.ActiveReports.GroupFooter).FullName
CType
(
Me
.Designer1.Selection(
0
), DataDynamics.ActiveReports.GroupFooter).Controls.Add(control)
Case
Else
Return
End
Select
End Sub
#End Region
End Class
7,在frmShowAR中给模版设置数据源
Private
Sub
frmShowAR_Load(
ByVal
sender
As
Object
,
ByVal
e
As
System.EventArgs)
Handles
Me
.Load
'
Show the table1
Dim
conn
As
String
=
"
Provider=Microsoft.Jet.OLEDB.4.0;Data Source=test.mdb;Persist Security Info=False
"
Dim
cmd
As
String
=
"
Select * from table1
"
Dim
adapter
As
New
OleDbDataAdapter(cmd, conn)
Dim
ds
As
New
DataSet
adapter.Fill(ds)
_rpt.DataSource
=
ds
_rpt.DataMember
=
ds.Tables(
0
).TableName
_rpt.Run()
Me
.Viewer1.Document
=
_rpt.Document
End Sub
8,ok!我们的工作结束了,接下去用户可以在程序中自己设计模版了
1)用户运行程序,出来如下界面:
<!--[if !vml]-->
<!--[endif]-->
2)用户自己添加group,添加控件,调整大小,增加控件的框线等等,如下:
<!--[if !vml]-->
<!--[endif]-->
3)不要忘记给GroupHeader1设置换页字段
<!--[if !vml]-->
<!--[endif]-->
4)ok,按Preview吧,看看我们的成果:
<!--[if !vml]-->
<!--[endif]-->
9,呵呵,现在用户想怎么打就怎么打了。
也许可能有人要问了,每次运行程序,用户都要去设置模版,都麻烦啊。
恩,我们可以增加一个save和load模版的功能,让用户自己把设计好的模版保存下来,今后直接load。
这个超级简单,只要增加2个控件,编码如下就可以了
Private
Sub
btnSave_Click(
ByVal
sender
As
System.Object,
ByVal
e
As
System.EventArgs)
Handles
btnSave.Click
Me
.Designer1.ExecuteAction(DataDynamics.ActiveReports.Design.DesignerAction.FileSave)
End Sub
Private
Sub
btnLoad_Click(
ByVal
sender
As
System.Object,
ByVal
e
As
System.EventArgs)
Handles
btnLoad.Click
Me
.Designer1.ExecuteAction(DataDynamics.ActiveReports.Design.DesignerAction.FileOpen)
End Sub
10,好了,本节就到这。
AR的自定义功能很强大的,运用的好,很多帐票都可以用自定义实现。
当然,文中举的例子比较简单,仅当抛砖引玉。
Public
Property
Report()
As
DataDynamics.ActiveReports.ActiveReport
Get
Return
_rpt
End
Get
Set
(
ByVal
Value
As
DataDynamics.ActiveReports.ActiveReport)
_rpt
=
Value
End
Set
End Property
Private
Sub
frmShowAR_Load(
ByVal
sender
As
Object
,
ByVal
e
As
System.EventArgs)
Handles
Me
.Load
_rpt.Run()
Me
.Viewer1.Document
=
_rpt.Document
End Sub
CType
(
Me
.Designer1.Selection(
0
), DataDynamics.ActiveReports.PageHeader).Controls.Add(control)