Question

我编写了一个脚本，为新用户安装了几台打印机。

我想更改其中一些设置，以便它们可以在页面的两面打印。

我相信这涉及使用printui修改属性，但它可能需要VB脚本或可能需要另一种.NET语言（我要么使用VB，C＃或IronPython）。

我可以为给定的打印机添加注释，但如何选择首选项并对其进行修改？

伪代码看起来像这样：

printui.exe / n printername / ??? [如何改变所需的质量]

OR调用相关的Windows API。

Answer 1

您可以使用printui执行此操作，将打印机设置为双面打印，然后使用printui / Ss将设置放入文件中。浏览各种选项，即2,7，d ......并查看哪个文件包含双工设置。

另一种方法是使用打印机api，并使用PRINTER_INFO_8（全局）或PRINTER_INFO_9（用户）结构 - MSDN link。然后使用DEVMODE结构将dmDuplex设置为双面。

首先打开打印机，然后在完成后将其关闭：

[DllImport("winspool.drv", EntryPoint = "OpenPrinter", SetLastError = true)]
    internal static extern bool OpenPrinter(string pPrinterName, ref IntPtr phPrinter, PRINTER_DEFAULTS pDefault);
[DllImport("winspool.drv", EntryPoint = "ClosePrinter", SetLastError = true)]
    internal static extern int ClosePrinter(IntPtr hPrinter);

使用GetPrinter检索当前的打印机设置，使用SetPrinter放回修改后的设置：

[DllImport("winspool.drv", CharSet = CharSet.Auto, EntryPoint = "GetPrinter", SetLastError = true)]
        internal static extern bool GetPrinter(IntPtr hPrinter, uint Level, IntPtr pPrinter, uint cbBuf, out uint pcbNeeded);
[DllImport("winspool.drv", CharSet = CharSet.Auto, EntryPoint = "SetPrinter", SetLastError = true)]
    internal static extern bool SetPrinter(IntPtr hPrinter, uint Level, IntPtr pPrinter, uint Command);

实际执行此操作的代码应如下所示：

var oldPrinter = printerFunctions.OpenPrinterHandle(String.Format(@"{0}\{1}", oldServerName, oldPrinterName));
var printerInfo8 = printerFunctions.GetPrinterInfo<PRINTER_INFO_8>(oldPrinter, 8);

// Change the dmDuplex value here.

printerFunctions.SetPrinter(oldPrinter, printerInfo8, 8);
printerFunctions.ClosePrinterHandle(oldPrinter);

public IntPtr OpenPrinterHandle(string printerName)
{
    var def = new PRINTER_DEFAULTS { pDatatype = null, pDevMode = IntPtr.Zero, DesiredAccess = OpenPrinterAccessCodes.PRINTER_ALL_ACCESS };
    var hPrinter = IntPtr.Zero;
    if (!PrinterNativeMethods.OpenPrinter(printerName, ref hPrinter, def))
    {
        var lastWin32Error = new Win32Exception(Marshal.GetLastWin32Error());
        Logger.Log("Failed open Printer: " + lastWin32Error.Message);
        throw lastWin32Error;
    }
    return hPrinter;
}

public void ClosePrinterHandle(IntPtr hPrinter)
{
    PrinterNativeMethods.ClosePrinter(hPrinter);
}

public void SetPrinter<T>(IntPtr hPrinter, T printerInfo, uint level)
{
    var size = (uint)Marshal.SizeOf(printerInfo);
    var printerInfoPtr = Marshal.AllocHGlobal((int)size);
    Marshal.StructureToPtr(printerInfo, printerInfoPtr, true);
    var result = PrinterNativeMethods.SetPrinter(hPrinter, level, printerInfoPtr, 0);
    if (!result)
    {
        var win32Error = Marshal.GetLastWin32Error();
        var lastWin32Error = new Win32Exception(win32Error);
        Logger.Log("Failed set printer: " + lastWin32Error.Message);
        throw lastWin32Error;
    }
    Marshal.FreeHGlobal(printerInfoPtr);
}

public T GetPrinterInfo<T>(IntPtr hPrinter, uint level)
{
    uint pcbNeeded;
    var bFlag = PrinterNativeMethods.GetPrinter(hPrinter, level, IntPtr.Zero, 0, out pcbNeeded);
    var win32Error = Marshal.GetLastWin32Error();
    if ((!bFlag) && (win32Error != PrinterNativeMethods.ERROR_INSUFFICIENT_BUFFER) || (pcbNeeded == 0))
    {
        var lastWin32Error = new Win32Exception(win32Error);
        Logger.Log("Failed get printer: " + lastWin32Error.Message);
        throw lastWin32Error;
    }

    var currentPrinterInfoPtr = Marshal.AllocHGlobal((int)pcbNeeded);
    bFlag = PrinterNativeMethods.GetPrinter(hPrinter, level, currentPrinterInfoPtr, pcbNeeded, out pcbNeeded);
    if (!bFlag)
    {
        var lastWin32Error = new Win32Exception();
        Logger.Log("Failed get printer: " + lastWin32Error.Message);
        throw lastWin32Error;
    }
    return (T)Marshal.PtrToStructure(currentPrinterInfoPtr, typeof(T));
}

以编程方式在Windows中更改打印机首选项

1 个答案: