原始打印设置DevMode选项(方向,副本,边距,默认来源等)

时间:2013-03-18 14:50:31

标签: c# .net windows winapi printing

希望有人在这里可以帮助我,因为我正在撞墙试图让它发挥作用。基本上我需要使用winspool.Drv win32 API打印以将原始文本/ PCL命令发送到打印机。这很好,但是,您在打印机对话框/首选项中选择的打印机选项都没有做任何事情。

最终我想从对话框PrinterSettings中获取DEVMODE,并将其用于原始打印,但我甚至无法让它手动设置它。

我尝试在WritePrinter之前更改DEVMODE,或者在单独的打开/关闭打印机之前,我尝试仅使用DocumentProperties调用,并使用带有PRINTER_INFO_8结构的GetPrinter / SetPrinter,没有什么可说的。 DEVMODE结构似乎填写正确,我改变它,它似乎正确改变,但打印机始终打印相同的方式无论如何。

以下是我一直在使用的代码:

方法一:

public static bool SetPrinterSettings(PrinterSettings settings, IntPtr hPrinter)
{
    IntPtr hDevMode; // a handle to our current DEVMODE
    IntPtr pDevMode; // a pointer to our current DEVMODE
    String sPrinterName; // normalized printer name
    DEVMODE dm;

    // Setup
    sPrinterName = settings.PrinterName.Normalize();

    // Obtain the current DEVMODE from the PrinterSettings
    hDevMode = settings.GetHdevmode(settings.DefaultPageSettings);

    // Obtain a lock on the handle and get an actual pointer so Windows won't move
    // it around while we're futzing with it
    pDevMode = GlobalLock(hDevMode);

    // test
    dm = (DEVMODE)Marshal.PtrToStructure(pDevMode, typeof(DEVMODE));

    // Our DEVMODE is 188 bytes, but dmSize returns 220, does this matter?
    // This code doesnt seem to work
    //dm.dmSize = (short)Marshal.SizeOf(dm); // Set size to our implementation of DevMode
    //int isize = GlobalSize(pDevMode).ToInt32() - (int)dm.dmSize; // Set the print drivers extra size
    //dm.dmDriverExtra = Convert.ToInt16(isize);

    // Change things
    dm.dmFields = DM_FIELD_TYPE.DM_ORIENTATION;
    dm.dmOrientation = 2;

    // Load the structure back into the buffer
    Marshal.StructureToPtr(dm, pDevMode, true);

    //Tell the printer about the new property
    int ret = DocumentProperties(IntPtr.Zero, hPrinter, sPrinterName, pDevMode, pDevMode, (DM_IN_BUFFER | DM_OUT_BUFFER));

    if (ret <= 0)
    {
        return false;
    }



    // We're done futzing
    GlobalUnlock(hDevMode);

    // Tell our printer settings to use the one we just overwrote
    //settings.SetHdevmode(hDevMode);

    // It's copied to our printer settings, so we can free the OS-level one
    GlobalFree(hDevMode);

    //test
    dm = (DEVMODE)Marshal.PtrToStructure(pDevMode, typeof(DEVMODE));

    // ^^ this contains correct orientation

    return true;
}

方法2:

public static bool SetLandscapeMode(PrinterSettings settings, IntPtr hPrinter)
{
    // Setup
    String sPrinterName = settings.PrinterName.Normalize();

    // get current printer settings
    int memNeeded = DocumentProperties(IntPtr.Zero, hPrinter, sPrinterName, IntPtr.Zero, IntPtr.Zero, 0);
    IntPtr pFullDevMode = Marshal.AllocHGlobal(memNeeded);
    DocumentProperties(IntPtr.Zero, hPrinter, sPrinterName, pFullDevMode, IntPtr.Zero, DM_OUT_BUFFER);

    DEVMODE dm = (DEVMODE)Marshal.PtrToStructure(pFullDevMode, typeof(DEVMODE));

    // change the settings
    dm.dmFields = DM_FIELD_TYPE.DM_ORIENTATION;
    dm.dmOrientation = 2;

    Marshal.StructureToPtr(dm, pFullDevMode, true);

    PRINTER_INFO_8 PI8 = new PRINTER_INFO_8();
    PI8.pDevMode = pFullDevMode;

    IntPtr pPI8 = Marshal.AllocHGlobal(Marshal.SizeOf(PI8));

    Marshal.StructureToPtr(PI8, pPI8, true);

    // save the printer settings
    SetPrinter(hPrinter, 9, pPI8, 0);

    Marshal.FreeHGlobal(pPI8);

    return true;
}

测试打印的代码:

private void testPrint_Click(object sender, EventArgs e)
{
    IntPtr hPrinter;

    if (printDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK)
    {
        hPrinter = RawPrint.OpenRAWPrinter(printDialog1.PrinterSettings.PrinterName);

        if (hPrinter == IntPtr.Zero)
        {
            MessageBox.Show("Error opening printer");
            return;
        }

        if (!RawPrint.StartRAWDocument(hPrinter, "Test document"))
        {
            MessageBox.Show("Error starting raw document");
            RawPrint.CloseRAWPrinter(hPrinter);
            return;
        }

        // Start a page.
        if (RawPrint.StartRawPage(hPrinter))
        {
            // Set the printers settings
            //if (!RawPrint.SetPrinterSettings(printDialog1.PrinterSettings, hPrinter))
            if(!RawPrint.SetLandscapeMode(printDialog1.PrinterSettings, hPrinter))
            {
                MessageBox.Show("Error setting printer settings");
                RawPrint.CloseRAWPrinter(hPrinter);
                return;
            }

            String test = "This is \r\n test print data";
            byte[] buf = Encoding.Default.GetBytes(test);

            GCHandle gch = GCHandle.Alloc(buf, GCHandleType.Pinned);
            RawPrint.writeRAW(hPrinter, gch.AddrOfPinnedObject(), buf.Length);
            gch.Free();

            RawPrint.EndRawPage(hPrinter);
        }

        RawPrint.EndRAWDocument(hPrinter);
        RawPrint.CloseRAWPrinter(hPrinter);
    }
    else
    {
        MessageBox.Show("Error starting raw page");
    }
}

唯一奇怪的是Marshal.SizeOf(typeof(DEVMODE))或Marshal.SizeOf(dm)等于188,而返回到结构中的dmSize是220.我尝试修改此dmSize以匹配我们的结构,如图所示在注释掉的代码中,但似乎错误或不起作用,不确定是否重要。

此外,DevModes中返回的信息似乎都是正确且有效的。我可以在打印对话框中设置选项,并在PrinterSettings devmode中查看它们。在这些函数的最后,将pDevMode编组回结构体中的设置已更改。

然而,这一切似乎都没有对印刷产生任何影响。有什么东西我不见了吗?

编辑:测试函数中的RawPrint调用只是假脱机程序api调用的包装。页面打印正常,它只是始终以纵向模式打印,没有选项可用。

1 个答案:

答案 0 :(得分:1)

不是通过使用WritePrinter绕过打印机驱动程序,而应该正常启动打印作业并使用ExtEscape()和PASSTHROUGH转义注入PCL。这将允许所有PrinterSettings值应用于作业。并非所有打印机驱动程序都支持PASSTHROUGH,但您可以通过使用QUERYESCSUPPORT调用ExtEscape()来检查驱动程序支持。