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我们有一个应用程序，其中包含一些我们仍在使用PrintDlg的旧打印机“设置”代码。我们使用自定义模板允许用户选择用于各种类型打印任务（例如报告或图纸）的打印机以及方向和纸张尺寸/来源。

它可以在 XP 和 32 位 Vista 上运行，但在 Vista x64 上它可以CDERR_MEMLOCKFAILURE通过CommDlgExtendedError(). 我尝试仅使用PRINTDLG结构中的基本输入来运行它，但如果参数包含PD_PRINTSETUPor PD_RETURNDEFAULT，我会收到该错误。

由于打印机选择/页面设置已拆分为PageSetupDlg和PrintDlgEx，因此如果不更改大量代码和/或完全更改我们向用户呈现打印和打印机设置的方式，就没有明显的简单转换。

有没有人在 64 位 Vista 上看到过这个问题，你有没有找到任何解决方法？

注意：
由于其他限制，应用程序以管理员身份运行

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3 回答 3

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我在微软论坛上找到了一个相关的帖子：在 Vista x64 上，DocumentProperties failed from UAC-elevated process

我已经用一个示例程序验证了 PrintDlg 以非管理员身份运行的工作原理。

于 2008-11-17T16:52:11.153 回答
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我在 Quicken 社区论坛上找到了一个帖子：Vista 64 Quicken 2008 打印问题的解决方案，以及相关的常见问题解答：如果我无法打印或收到“与打印机通信时出错”怎么办？以及使用仿真打印机的建议。

于 2008-11-17T16:48:30.380 回答
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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”、“副本”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：”字段显示的是什么，所以我也将其省略了。

对话框如下所示：

替代文字 http://www.geocities.com/deancooper2000/PrintDialog64.jpg

这是我的代码（我已经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;
    }
}
}
于 2009-01-17T15:53:58.513 回答