Question

我们的应用程序包含一些旧的打印机“设置”代码，我们仍在使用PrintDlg。我们使用自定义模板允许用户选择使用哪种打印机进行各种类型的打印任务（例如报告或绘图）以及方向和纸张尺寸/来源。

适用于XP和32位Vista，但在Vista x64上，它通过CDERR_MEMLOCKFAILURE获得CommDlgExtendedError()。我已尝试仅使用PRINTDLG结构中的裸骨输入来运行它，但如果参数包含PD_PRINTSETUP或PD_RETURNDEFAULT，则会收到该错误。

由于打印机选择/页面设置已分为PageSetupDlg和PrintDlgEx，因此无需更改大量代码和/或完全更改我们提供的打印和打印机的方式设置给用户。

有没有人在64位Vista上看到过这个问题，你找到了解决办法吗？

注意：
由于其他约束，应用程序以管理员身份运行

Answer 1

我在Microsoft论坛上发现了相关帖子：On Vista x64, DocumentProperties fails from UAC-elevated process

我已经通过示例程序验证了PrintDlg作为非管理员运行。

Answer 2

我在Quicken社区论坛上发现了一条帖子：Solution to Printing Problems Vista 64 Quicken 2008，相关常见问题解答：What if I'm unable to print, or receive "Error communicating with printer"?以及使用仿真打印机的建议。

Answer 3

我刚刚在我的应用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，它会很好用，但在64位模式下编译时甚至不会弹出。没有错误消息，没有任何消息。对ShowDialog的调用只是立即返回。（请注意，我正在运行64位Vista。）

我尝试使用PrintDlg，但这有同样的问题。我在网上看了很多人，我们遇到了类似的问题，但显然不是每个拥有64位Vista的人都看到了这个问题。无论如何，我最终决定编写我自己的PrintDialog版本（从在线代码借用），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”，“复制”和“打印到文件”。这应该很容易添加，但我的应用程序不需要它们。我也无法弄清楚“Type：”字段显示的内容，所以我也将其删除了。

这是对话框的样子：

alt text http://www.geocities.com/deancooper2000/PrintDialog64.jpg

这是我的代码（我已经离开了设计器代码，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;
    }
}
}

在Vista x64上使用PrintDlg不起作用，在32位和XP上运行良好

3 个答案: