C# 带WebBrowser控件的双面打印仅打印一面

我的.NET应用程序只打印HTML文件的第二页，而完全忽略了第一页（没有打印其他页面，并且后面是空白的），我遇到了一个问题

当我打开打印机的队列窗口时，它确实显示它从“假脱机”到“打印”，并列出了这两个页面，因此我不知道它为什么不打印第一个页面

（我的打印机设置为双面打印，如果我只是从浏览器中打印HTML文档，它将按预期工作）

以下是我正在做的：

private void Form1_Load(object sender, EventArgs e)
    {
        //  Create a FileSystemWatcher to monitor all files on drive C.
        FileSystemWatcher fsw = new FileSystemWatcher("C:\\COAForms");

        //  Watch for changes in LastAccess and LastWrite times, and 
        //  the renaming of files or directories. 
        fsw.NotifyFilter = NotifyFilters.LastAccess | NotifyFilters.LastWrite
            | NotifyFilters.FileName | NotifyFilters.DirectoryName;

        //  Register a handler that gets called when a  
        //  file is created, changed, or deleted.
        //fsw.Changed += new FileSystemEventHandler(OnChanged);

        fsw.Created += new FileSystemEventHandler(OnChanged);
        fsw.Error += new ErrorEventHandler(fsw_Error);

        //fsw.Deleted += new FileSystemEventHandler(OnChanged);
        fsw.EnableRaisingEvents = true;
        fsw.SynchronizingObject = this;
        PrinterSettings settings = new PrinterSettings();
        label2.Text = settings.PrinterName;

        Thread.CurrentThread.SetApartmentState(ApartmentState.STA);
    }

    void fsw_Error(object sender, ErrorEventArgs e)
    {
        MessageBox.Show(e.ToString());
    }

    private void OnChanged(object source, FileSystemEventArgs e)
    {
        notifyIcon1.BalloonTipText = "Printing document " + e.Name + "...";
        notifyIcon1.BalloonTipTitle = "Printing Application";
        notifyIcon1.BalloonTipIcon = ToolTipIcon.Info;
        notifyIcon1.ShowBalloonTip(500);

        PrintCOAPage(e.Name);
    }

    private void PrintCOAPage(string name)
    {
        try
        {
            // Create a WebBrowser instance. 
            WebBrowser webBrowserForPrinting = new WebBrowser();

            // Add an event handler that prints the document after it loads.
            webBrowserForPrinting.DocumentCompleted +=
                new WebBrowserDocumentCompletedEventHandler(PrintDocument);

            // Set the Url property to load the document.
            webBrowserForPrinting.Url = new Uri(@"C:\COAForms\" + name);
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.ToString());
        }
    }

    private void PrintDocument(object sender,
        WebBrowserDocumentCompletedEventArgs e)
    {
        try
        {
            PrinterSettings ps = new PrinterSettings();
            ps.Duplex = Duplex.Vertical;

            // Print the document now that it is fully loaded.
            ((WebBrowser)sender).Print();

            // Dispose the WebBrowser now that the task is complete. 
            ((WebBrowser)sender).Dispose();
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.ToString());
        }

    }

    private void notifyIcon1_MouseDoubleClick(object sender, MouseEventArgs e)
    {
        this.Show();
        this.Activate();
        if (this.WindowState == FormWindowState.Minimized)
        {
            this.WindowState = FormWindowState.Normal;
        }
    }

    private void Form1_Resize(object sender, EventArgs e)
    {
        if (FormWindowState.Minimized == WindowState)
        {
            Hide();
        }  
    }

我只是最近才将PrinterSettings添加到代码中，但它没有任何改变

---

我非常感谢你们在这方面提供的任何帮助！谢谢大家!

Wow，我不认为CSS会影响它，但不管出于什么原因，我使用的CSS（包括z-index）在WebBrowser控件下打印预览时，使第一页不显示，但在实际的IE8中工作得很好。。在稍微更改CSS后，它现在可以正常工作。

这是

PrintDocument

或

PrintCOAPage

的问题吗？我不确定，我没有收到任何错误，只是打印了一面（第二页）。这可能是WebBrowser打印的问题吗？在多台打印机上得到相同的结果吗？打印机是什么牌子/型号的？Xerox Workcenter 5655 PS，我试过我们这里的另一台Brother打印机，但遇到了同样的问题：（你能分享一下吗？我也有同样的问题。谢谢：）