我刚刚在我的应用程序中添加打印时遇到了这个问题。我正在使用 PrintDialog 类，如果它被编译为 32 位应用程序，它工作得很好，但在 64 位模式下编译时甚至不会弹出。没有错误消息，什么都没有。对 ShowDialog 的调用立即返回。 （请注意，我运行的是 64 位 Vista。）
我尝试使用 PrintDlg，但也有同样的问题。我在网上查了一下，发现很多人都遇到了类似的问题，但显然不是每个拥有 64 位 Vista 的人都能看到这一点。无论如何，我最终决定编写自己的 PrintDialog 版本（借用在线代码），但这有点棘手（因为一些在线代码有错误），因为我从来没有在网上找到一个完整的例子，我想我会在这里发布我的解决方案。
请注意，我的版本在对话框中留下了一些内容，例如“打印范围”、“份数”和“打印到文件”。这应该很容易添加，但我的应用不需要它们。我也无法弄清楚“类型：”字段显示的内容，所以我也将其省略了。
对话框如下所示：
alt text http://www.geocities.com/deancooper2000/PrintDialog64.jpg
这是我的代码（我已将设计器代码省略了，因为它应该很容易重新创建）：
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Printing;
using System.Printing;
using System.Runtime.InteropServices;
using System.Windows.Forms;
using Zemetrics.Diagnostics;
namespace Utils
{
/// <summary>
/// The PrintDialog64 class replaces the standard PrintDialog with one that works in Vista x64
/// </summary>
public partial class PrintDialog64 : Form
{
#region Private members
[DllImport("winspool.drv", EntryPoint="DocumentPropertiesW")]
private static extern int DocumentProperties(IntPtr hWnd,IntPtr hPrinter,[MarshalAs(UnmanagedType.LPWStr)] string pDeviceName,IntPtr pDevMode,IntPtr devModeIn,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")] private static extern IntPtr GlobalLock(IntPtr hMem);
[DllImport("kernel32.dll")] private static extern int GlobalUnlock(IntPtr hMem);
[DllImport("kernel32.dll")] private static extern int GlobalFree(IntPtr hMem);
private const int DM_PROMPT = 4;
private const int DM_OUT_BUFFER = 2;
private const int DM_IN_BUFFER = 8;
private List<PrinterItem> printers;
private string printerName;
private string originalName;
private IntPtr hDevMode = IntPtr.Zero;
#endregion
/// <summary>
/// Gets or sets the printer that prints the document
/// </summary>
public PrinterSettings PrinterSettings { get; set; }
/// <summary>
/// Gets or sets a value indicating the PrintDocument used to obtain PrinterSettings.
/// </summary>
public PrintDocument Document { get; set; }
/// <summary>
/// Constructs a replacement for the standard PrintDialog with one that works in Vista x64
/// </summary>
public PrintDialog64()
{
InitializeComponent();
}
#region PrinterItem class
/// <summary>
/// The PrinterItem class holds a reference to a PrintQueue and allows us to sort a list based on printer name
/// </summary>
private class PrinterItem : IComparable<PrinterItem>
{
#region Private members
private PrinterItem() {}
#endregion
/// <summary>
/// Construct a PrinterItem by supplying a reference to the printer's PrintQueue class
/// </summary>
///
/// \param[in] printer Reference to PrintQueue class for this printer
public PrinterItem(PrintQueue printer)
{
Printer = printer;
}
/// <summary>
/// Reference to PrintQueue class for this printer
/// </summary>
public PrintQueue Printer { get; set; }
/// <summary>
/// The string for this class is simply the FullName of the printer
/// </summary>
public override string ToString()
{
return Printer.FullName;
}
#region IComparable<PrinterItem> Members
/// <summary>
/// Implements IComparable interface to allow sorting of PrinterItem classes (based on printer name)
/// </summary>
///
/// \param[in] other The other PrinterItem class that we are to compare this one to
public int CompareTo(PrinterItem other)
{
return other.Printer.FullName.CompareTo(this.Printer.FullName);
}
#endregion
}
#endregion
private List<PrinterItem> GetPrinters()
{
List<PrinterItem> printers = new List<PrinterItem>();
EnumeratedPrintQueueTypes[] Queue_types = {EnumeratedPrintQueueTypes.Local,EnumeratedPrintQueueTypes.Connections};
try {
using (LocalPrintServer server = new LocalPrintServer())
foreach (PrintQueue printer in server.GetPrintQueues(Queue_types))
printers.Add(new PrinterItem(printer));
} catch {}
printers.Sort();
return printers;
}
private void PrintDialog64_Shown(object sender, EventArgs e)
{
originalName = Document.PrinterSettings.PrinterName;
printers = GetPrinters();
int index=0, i=0;
foreach(PrinterItem printer in printers) {
nameComboBox.Items.Add(printer.ToString());
if (printer.ToString() == originalName) index = i;
i++;
}
nameComboBox.SelectedIndex = index;
}
private void nameComboBox_Leave(object sender, EventArgs e)
{
string text = nameComboBox.Text;
foreach(Object field in nameComboBox.Items)
if (((string) field).ToLower().StartsWith(text.ToLower())) nameComboBox.SelectedItem = field;
if (nameComboBox.SelectedIndex < 0)
nameComboBox.SelectedIndex = 0;
}
private void nameComboBox_SelectedIndexChanged(object sender, EventArgs e)
{
PrintQueue printer = printers[nameComboBox.SelectedIndex].Printer;
if (hDevMode!=IntPtr.Zero) GlobalFree(hDevMode);
PrinterSettings.PrinterName = printerName = printer.FullName;
hDevMode = PrinterSettings.GetHdevmode(Document.DefaultPageSettings);
statusValue .Text = printer.QueueStatus.ToString()=="None" ? "Ready" : printer.QueueStatus.ToString();
whereValue .Text = printer.Location=="" ? printer.QueuePort.Name : printer.Location;
commentValue.Text = printer.Comment;
}
private void propertiesButton_Click(object sender, EventArgs e)
{
IntPtr handle;
OpenPrinter(printerName, out handle, IntPtr.Zero);
IntPtr pDevMode = GlobalLock( hDevMode );
DocumentProperties(this.Handle, handle, printerName, pDevMode, pDevMode, DM_IN_BUFFER | DM_PROMPT | DM_OUT_BUFFER);
GlobalUnlock( hDevMode );
PrinterSettings.SetHdevmode( hDevMode );
PrinterSettings.DefaultPageSettings.SetHdevmode( hDevMode );
ClosePrinter(handle);
}
private void pageDefaultsButton_Click(object sender, EventArgs e)
{
PageSetupDialog setup = new PageSetupDialog();
setup.PageSettings = Document.DefaultPageSettings;
if (setup.ShowDialog() == DialogResult.OK) {
if (hDevMode!=IntPtr.Zero) GlobalFree(hDevMode);
hDevMode = PrinterSettings.GetHdevmode( Document.DefaultPageSettings = setup.PageSettings );
}
}
private void okButton_Click(object sender, EventArgs e)
{
if (hDevMode!=IntPtr.Zero) GlobalFree(hDevMode);
}
private void cancelButton_Click(object sender, EventArgs e)
{
if (hDevMode!=IntPtr.Zero) GlobalFree(hDevMode);
PrinterSettings.PrinterName = originalName;
}
}
}