编辑:我的错!我原本期望更改会写回默认的打印机设置,但实际上只有打印机设置的本地实例被更改了。 - 下面的代码似乎按照预期工作
我想显示给定打印机的自定义打印机属性。我需要这个作为我试图编写的自定义PrintDialog的一部分。
我能在网上找到的大多数示例都可以显示对话框,但用户可能做出的任何更改都会丢失,这使得它无用。
例如: http://www.codeproject.com/KB/system/PrinterPropertiesWindow.aspx
(关于上面的页面:我尝试根据页面上的BartJoy的建议更改代码,但那并没有修复它)
我还尝试了pinvoke.net页面上的示例和建议,但仍然无法工作:
http://www.pinvoke.net/default.aspx/winspool.documentproperties
从上述网站中,我认为问题可能只存在于64位Windows和/或打印机名称超过32个字符时。
我不知道下一步该尝试什么... 我感激任何建议和评论!
编辑:这是我尝试过的:
[DllImport("winspool.Drv", EntryPoint = "DocumentPropertiesW", SetLastError = true,
ExactSpelling = true, CallingConvention = CallingConvention.StdCall)]
static extern int DocumentProperties(IntPtr hwnd, IntPtr hPrinter,
[MarshalAs(UnmanagedType.LPWStr)] string pDeviceName,
IntPtr pDevModeOutput, IntPtr pDevModeInput, int fMode);
[DllImport("winspool.drv")]
private static extern int OpenPrinter(string pPrinterName, out IntPtr hPrinter, IntPtr pDefault);
[DllImport("winspool.drv")]
private static extern int ClosePrinter(IntPtr phPrinter);
[DllImport("kernel32.dll")]
static extern IntPtr GlobalLock(IntPtr hMem);
[DllImport("kernel32.dll")]
static extern bool GlobalUnlock(IntPtr hMem);
[DllImport("kernel32.dll")]
static extern bool GlobalFree(IntPtr hMem);
private const int DM_PROMPT = 4;
private const int DM_OUT_BUFFER = 2;
private const int DM_IN_BUFFER = 8;
private void OpenPrinterPropertiesDialog()
{
var printerSettings = new System.Drawing.Printing.PrinterSettings();
var printerName = printerSettings.PrinterName;
IntPtr handle;
OpenPrinter(printerName, out handle, IntPtr.Zero);
IntPtr hDevMode = printerSettings.GetHdevmode(printerSettings.DefaultPageSettings);
IntPtr pDevMode = GlobalLock(hDevMode);
int sizeNeeded = DocumentProperties(this.Handle, handle, printerName, pDevMode, pDevMode, 0);
IntPtr devModeData = Marshal.AllocHGlobal(sizeNeeded);
DocumentProperties(this.Handle, handle, printerName, devModeData, pDevMode, DM_IN_BUFFER | DM_PROMPT | DM_OUT_BUFFER);
ClosePrinter(handle);
GlobalUnlock(hDevMode);
printerSettings.SetHdevmode(devModeData);
printerSettings.DefaultPageSettings.SetHdevmode(devModeData);
GlobalFree(hDevMode);
Marshal.FreeHGlobal(devModeData);
}
我尝试使用OpenPrinter和ClosePrinter方法,并将devModeData作为第二次调用的输出参数传递,因为我发现pinvoke.net上的原始代码没有这样做(但我承认,我不知道我在做什么-这只是试错)。
以下是来自pinvoke网站的原始代码:
private void OpenPrinterPropertiesDialog(PrinterSettings printerSettings)
{
IntPtr hDevMode = printerSettings.GetHdevmode(printerSettings.DefaultPageSettings);
IntPtr pDevMode = GlobalLock(hDevMode);
int sizeNeeded = DocumentProperties(this.Handle, IntPtr.Zero, printerSettings.PrinterName, pDevMode, pDevMode, 0);
IntPtr devModeData = Marshal.AllocHGlobal(sizeNeeded);
DocumentProperties(this.Handle, IntPtr.Zero, printerSettings.PrinterName, IntPtr.Zero, pDevMode, 14);
GlobalUnlock(hDevMode);
printerSettings.SetHdevmode(devModeData);
printerSettings.DefaultPageSettings.SetHdevmode(devModeData);
GlobalFree(hDevMode);
Marshal.FreeHGlobal(devModeData);
}