怎么将Datareport打印出来时是横向的？

[zhuangcrui]

我用Datareport打印都是竖向的，怎么让它变成横向的？

[lihonggen0]

Option Explicit

Public Enum PrinterOrientationConstants
OrientPortrait = 1
OrientLandscape = 2
End Enum

Private Type DEVMODE
dmDeviceName As String * 32
dmSpecVersion As Integer
dmDriverVersion As Integer
dmSize As Integer
dmDriverExtra As Integer
dmFields As Long
dmOrientation As Integer
dmPaperSize As Integer
dmPaperLength As Integer
dmPaperWidth As Integer
dmScale As Integer
dmCopies As Integer
dmDefaultSource As Integer
dmPrintQuality As Integer
dmColor As Integer
dmDuplex As Integer
dmYResolution As Integer
dmTTOption As Integer
dmCollate As Integer
dmFormName As String * 32
dmUnusedPadding As Integer
dmBitsPerPel As Integer
dmPelsWidth As Long
dmPelsHeight As Long
dmDisplayFlags As Long
dmDisplayFrequency As Long
End Type

Private Type PRINTER_DEFAULTS
pDatatype As String
pDevMode As Long
DesiredAccess As Long
End Type

Private Type PRINTER_INFO_2
pServerName As Long
pPrinterName As Long
pShareName As Long
pPortName As Long
pDriverName As Long
pComment As Long
pLocation As Long
pDevMode As Long
pSepFile As Long
pPrintProcessor As Long
pDatatype As Long
pParameters As Long
pSecurityDescriptor As Long
Attributes As Long
Priority As Long
DefaultPriority As Long
StartTime As Long
UntilTime As Long
Status As Long
cJobs As Long
AveragePPM As Long
End Type

'*******************'
' iDmpaper值 纸张 '
' 11 A5 '
' 13 B5 '
'*******************'

Private Const DM_IN_BUFFER As Long = 8
Private Const DM_OUT_BUFFER As Long = 2
Private Const DM_ORIENTATION As Long = &H1
Private Const DM_PAPERSIZE = &H2&

Private Const PRINTER_ACCESS_ADMINISTER As Long = &H4
Private Const PRINTER_ACCESS_USE As Long = &H8
Private Const STANDARD_RIGHTS_REQUIRED As Long = &HF0000
Private Const PRINTER_ALL_ACCESS = (STANDARD_RIGHTS_REQUIRED _
Or _
PRINTER_ACCESS_ADMINISTER Or PRINTER_ACCESS_USE)

Private Declare Sub CopyMemory Lib "kernel32" Alias _
"RtlMoveMemory" _
(hpvDest As Any, hpvSource As Any, ByVal _
cbCopy As Long)

Private Declare Function OpenPrinter Lib "winspool.drv" Alias _
"OpenPrinterA" (ByVal pPrinterName As String, phPrinter As _
Long, pDefault As Any) As Long

Private Declare Function ClosePrinter Lib "winspool.drv" _
(ByVal hPrinter As Long) As Long

Private Declare Function DocumentProperties Lib "winspool.drv" _
Alias "DocumentPropertiesA" (ByVal hwnd As Long, ByVal hPrinter _
As Long, _
ByVal pDeviceName As String, pDevModeOutput As _
Any, _
pDevModeInput As Any, _
ByVal fMode As Long) As Long

Private Declare Function GetPrinter Lib "winspool.drv" _
Alias "GetPrinterA" (ByVal hPrinter As Long, ByVal Level As Long, _
pPrinter As Any, ByVal cbBuf As Long, pcbNeeded As Long) As _
Long

Private Declare Function SetPrinter Lib "winspool.drv" _
Alias "SetPrinterA" (ByVal hPrinter As Long, ByVal Level As Long, _
pPrinter As Any, ByVal Command As Long) As Long

'在打印或预览之前直接调用SetDefaultPrinterOrientation 打印走向常数。注意：红色注释部分用于改变纸张的大小。
Function SetDefaultPrinterOrientation(ByVal eOrientation As _
PrinterOrientationConstants, iDmpaper As Integer) As Boolean

Dim bDevMode() As Byte
Dim bPrinterInfo2() As Byte
Dim hPrinter As Long
Dim lResult As Long
Dim nSize As Long
Dim sPrnName As String
Dim dm As DEVMODE
Dim olddm As DEVMODE
Dim pd As PRINTER_DEFAULTS
Dim pi2 As PRINTER_INFO_2

' 获取默认打印机的设备名称
sPrnName = Printer.DeviceName
' 由于要调用SetPrinter，所以
' 如果是在NT下就要求PRINTER_ALL_ACCESS
pd.DesiredAccess = PRINTER_ALL_ACCESS

' 获取打印机句柄
If OpenPrinter(sPrnName, hPrinter, pd) Then

' 获取PRINTER_INFO_2结构要求的字节数

Call GetPrinter(hPrinter, 2&, 0&, 0&, nSize)
ReDim bPrinterInfo2(1 To nSize) As Byte
lResult = GetPrinter(hPrinter, 2, bPrinterInfo2(1), nSize, nSize)
Call CopyMemory(pi2, bPrinterInfo2(1), Len(pi2))
nSize = DocumentProperties(0&, hPrinter, sPrnName, 0&, 0&, 0)
ReDim bDevMode(1 To nSize)
If pi2.pDevMode Then
Call CopyMemory(bDevMode(1), ByVal pi2.pDevMode, Len(dm))
Else
Call DocumentProperties(0&, hPrinter, sPrnName, bDevMode(1), 0&, DM_OUT_BUFFER)
End If

Call CopyMemory(dm, bDevMode(1), Len(dm))
Call CopyMemory(olddm, bDevMode(1), Len(olddm))
With dm
' 设置新的走向
.dmOrientation = eOrientation
.dmFields = DM_ORIENTATION
.dmPaperSize = iDmpaper '将纸张大小设为iDmpaper，请自行更改所需大小
' .dmPaperLength = iDmpaperLength
' .dmPaperWidth = iDmpaperWidth
.dmFields = DM_PAPERSIZE '必须，否则无法设置纸张大小
End With

Call CopyMemory(bDevMode(1), dm, Len(dm))

Call DocumentProperties(0&, hPrinter, sPrnName, _
bDevMode(1), bDevMode(1), DM_IN_BUFFER Or _
DM_OUT_BUFFER)

pi2.pDevMode = VarPtr(bDevMode(1))

lResult = SetPrinter(hPrinter, 2, pi2, 0&)

Call ClosePrinter(hPrinter)
SetDefaultPrinterOrientation = True
Else
SetDefaultPrinterOrientation = False
End If

End Function

[lihonggen0]

改变方向的模块

'Constants used in the DevMode structure
Private Const CCHDEVICENAME = 32
Private Const CCHFORMNAME = 32

'Constants for NT security
Private Const STANDARD_RIGHTS_REQUIRED = &HF0000
Private Const PRINTER_ACCESS_ADMINISTER = &H4
Private Const PRINTER_ACCESS_USE = &H8
Private Const PRINTER_ALL_ACCESS = (STANDARD_RIGHTS_REQUIRED Or PRINTER_ACCESS_ADMINISTER Or PRINTER_ACCESS_USE)

'Constants used to make changes to the values contained in the DevMode
Private Const DM_MODIFY = 8
Private Const DM_IN_BUFFER = DM_MODIFY
Private Const DM_COPY = 2
Private Const DM_OUT_BUFFER = DM_COPY
Private Const DM_DUPLEX = &H1000&
Private Const DMDUP_SIMPLEX = 1
Private Const DMDUP_VERTICAL = 2
Private Const DMDUP_HORIZONTAL = 3
Private Const DM_ORIENTATION = &H1&
Private PageDirection As Integer
'------USER DEFINED TYPES

'The DevMode structure contains printing parameters.
'Note that this only represents the PUBLIC portion of the DevMode.
' The full DevMode also contains a variable length PRIVATE section
' which varies in length and content between printer drivers.
'NEVER use this User Defined Type directly with any API call.
' Always combine it into a FULL DevMode structure and then send the
' full DevMode to the API call.
Private Type DEVMODE
dmDeviceName As String * CCHDEVICENAME
dmSpecVersion As Integer
dmDriverVersion As Integer
dmSize As Integer
dmDriverExtra As Integer
dmFields As Long
dmOrientation As Integer
dmPaperSize As Integer
dmPaperLength As Integer
dmPaperWidth As Integer
dmScale As Integer
dmCopies As Integer
dmDefaultSource As Integer
dmPrintQuality As Integer
dmColor As Integer
dmDuplex As Integer
dmYResolution As Integer
dmTTOption As Integer
dmCollate As Integer
dmFormName As String * CCHFORMNAME
dmLogPixels As Integer
dmBitsPerPel As Long
dmPelsWidth As Long
dmPelsHeight As Long
dmDisplayFlags As Long
dmDisplayFrequency As Long
dmICMMethod As Long ' // Windows 95 only
dmICMIntent As Long ' // Windows 95 only
dmMediaType As Long ' // Windows 95 only
dmDitherType As Long ' // Windows 95 only
dmReserved1 As Long ' // Windows 95 only
dmReserved2 As Long ' // Windows 95 only
End Type

Private Type PRINTER_DEFAULTS
'Note:
' The definition of Printer_Defaults in the VB5 API viewer is incorrect.
' Below, pDevMode has been corrected to LONG.
pDatatype As String
pDevMode As Long
DesiredAccess As Long
End Type


'------DECLARATIONS

Private Declare Function OpenPrinter Lib "winspool.drv" Alias "OpenPrinterA" (ByVal pPrinterName As String, phPrinter As Long, pDefault As PRINTER_DEFAULTS) As Long
Private Declare Function SetPrinter Lib "winspool.drv" Alias "SetPrinterA" (ByVal hPrinter As Long, ByVal Level As Long, pPrinter As Any, ByVal Command As Long) As Long
Private Declare Function GetPrinter Lib "winspool.drv" Alias "GetPrinterA" (ByVal hPrinter As Long, ByVal Level As Long, pPrinter As Any, ByVal cbBuf As Long, pcbNeeded As Long) As Long
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (hpvDest As Any, hpvSource As Any, ByVal cbCopy As Long)
Private Declare Function ClosePrinter Lib "winspool.drv" (ByVal hPrinter As Long) As Long

'The following is an unusual declaration of DocumentProperties:
' pDevModeOutput and pDevModeInput are usually declared ByRef. They are declared
' ByVal in this program because we're using a Printer_Info_2 structure.
' The pi2 structure contains a variable of type LONG which contains the address
' of the DevMode structure (this is called a pointer). This LONG variable must
' be passed ByVal.
' Normally this function is called with a BYTE ARRAY which contains the DevMode
' structure and the Byte Array is passed ByRef.
Private Declare Function DocumentProperties Lib "winspool.drv" Alias "DocumentPropertiesA" (ByVal hwnd As Long, ByVal hPrinter As Long, ByVal pDeviceName As String, ByVal pDevModeOutput As Any, ByVal pDevModeInput As Any, ByVal fMode As Long) As Long

Private Sub SetOrientation(NewSetting As Long, chng As Integer, ByVal frm As Form)
Dim PrinterHandle As Long
Dim PrinterName As String
Dim pd As PRINTER_DEFAULTS
Dim MyDevMode As DEVMODE
Dim Result As Long
Dim Needed As Long
Dim pFullDevMode As Long
Dim pi2_buffer() As Long 'This is a block of memory for the Printer_Info_2 structure
'If you need to use the Printer_Info_2 User Defined Type, the
' definition of Printer_Info_2 in the API viewer is incorrect.
' pDevMode and pSecurityDescriptor should be defined As Long.

PrinterName = Printer.DeviceName
If PrinterName = "" Then
Exit Sub
End If

pd.pDatatype = vbNullString
pd.pDevMode = 0&
'Printer_Access_All is required for NT security
pd.DesiredAccess = PRINTER_ALL_ACCESS

Result = OpenPrinter(PrinterName, PrinterHandle, pd)

'The first call to GetPrinter gets the size, in bytes, of the buffer needed.
'This value is divided by 4 since each element of pi2_buffer is a long.
Result = GetPrinter(PrinterHandle, 2, ByVal 0&, 0, Needed)
ReDim pi2_buffer((Needed \ 4))
Result = GetPrinter(PrinterHandle, 2, pi2_buffer(0), Needed, Needed)

'The seventh element of pi2_buffer is a Pointer to a block of memory
' which contains the full DevMode (including the PRIVATE portion).
pFullDevMode = pi2_buffer(7)

'Copy the Public portion of FullDevMode into our DevMode structure
Call CopyMemory(MyDevMode, ByVal pFullDevMode, Len(MyDevMode))

'Make desired changes
MyDevMode.dmDuplex = NewSetting
MyDevMode.dmFields = DM_DUPLEX Or DM_ORIENTATION
MyDevMode.dmOrientation = chng

'Copy our DevMode structure back into FullDevMode
Call CopyMemory(ByVal pFullDevMode, MyDevMode, Len(MyDevMode))

'Copy our changes to "the PUBLIC portion of the DevMode" into "the PRIVATE portion of the DevMode"
Result = DocumentProperties(frm.hwnd, PrinterHandle, PrinterName, ByVal pFullDevMode, ByVal pFullDevMode, DM_IN_BUFFER Or DM_OUT_BUFFER)

'Update the printer's default properties (to verify, go to the Printer folder
' and check the properties for the printer)
Result = SetPrinter(PrinterHandle, 2, pi2_buffer(0), 0&)

Call ClosePrinter(PrinterHandle)

'Note: Once "Set Printer = " is executed, anywhere in the code, after that point
' changes made with SetPrinter will ONLY affect the system-wide printer --
' -- the changes will NOT affect the VB printer object.
' Therefore, it may be necessary to reset the printer object's parameters to
' those chosen in the devmode.
Dim p As Printer
For Each p In Printers
If p.DeviceName = PrinterName Then
Set Printer = p
Exit For
End If
Next p
Printer.Duplex = MyDevMode.dmDuplex
End Sub

Public Sub ChngPrinterOrientationLandscape(ByVal frm As Form)
PageDirection = 2
Call SetOrientation(DMDUP_SIMPLEX, PageDirection, frm)
End Sub

Public Sub ResetPrinterOrientation(ByVal frm As Form)

If PageDirection = 1 Then
PageDirection = 2
Else
PageDirection = 1
End If
Call SetOrientation(DMDUP_SIMPLEX, PageDirection, frm)
End Sub

Public Sub ChngPrinterOrientationPortrait(ByVal frm As Form)

PageDirection = 1
Call SetOrientation(DMDUP_SIMPLEX, PageDirection, frm)
End Sub

[zhuangcrui]

怎么没有人帮忙？

[uranium237]

去这儿看一下，可能会对你有帮助
http://vbboshi.myrice.com/vbtech/database/page_3/file74.htm

[zhuangcrui]

大哥：能不能解释下？我看不懂的！比较笨点！

[zhuangcrui]

然后这些是写在哪里？

[lihonggen0]

上面的东东存为一个模块，屏幕调用：

ChngPrinterOrientationLandscape me 横向

ChngPrinterOrientationPortrait me 纵向

ResetPrinterOrientation me 还原

[zhuangcrui]

ChngPrinterOrientationLandscape me 横向

ChngPrinterOrientationPortrait me 纵向

ResetPrinterOrientation me 还原
那这个写在哪里？谢谢！

[lihonggen0]

窗体中

[zhuangcrui]

是写在form_load()?还是什么 ？
还有我看过您在《此贴用来收集VB应用的精华文章、代码、实例，好的东西共同分享,共同提高！》里面写的VB导出到Excel提速之法的程序，那些是写在哪里？好象没有将数据库里表的数据导出的语句

[zhuangcrui]

怎样使datareport预览时是横向的？
因为要使它打印时改变系统默认打印机设置，会变成横向的！

[demension]

直接将Datareport1.Orientation = rptOrientLandscape,打印出来就是横向的,不过要装VB6.0+SP5,不打SP5的话没这个属性的