[水晶报表小技巧-开发-1]换页事件截取

Mail中有朋友问到,顺便写出来.

VB+水晶报表9,这个还是很简单的,自带事件

Private Sub CRViewer91_NextPageButtonClicked(UseDefault As Boolean)

Call MsgBox("向后换页")

End Sub

Private Sub CRViewer91_LastPageButtonClicked(UseDefault As Boolean)

Call MsgBox("最后一页")

End Sub

Private Sub CRViewer91_FirstPageButtonClicked(UseDefault As Boolean)

Call MsgBox("第一页")

End Sub

Private Sub CRViewer91_PrevPageButtonClicked(UseDefault As Boolean)

Call MsgBox("向前一页")

End Sub

VS.Net2003自带的,好象没有直接的事件,

不过变通一下可以获得的，

先定义两个全局变量

Public LastPageNum As Int16 '上一页的页码

Public NowPageNum As Int16 '当前页的页码

使用如下事件技巧性获得页面变更事件，

Private Sub CrystalReportViewer1_Navigate(ByVal source As Object, ByVal e As CrystalDecisions.Windows.Forms.NavigateEventArgs) Handles CrystalReportViewer1.Navigate

'取得当前页码

NowPageNum = CrystalReportViewer1.GetCurrentPageNumber

'如果是第一次加载，则退出

If NowPageNum = -1 Then

Exit Sub

End If

'如果是换页

If LastPageNum <> NowPageNum Then

Call MsgBox("换页了")

End If

'更换变量的值

LastPageNum = NowPageNum

End Sub