C# 打印特定选项卡中的富文本框多页C

我正在做一个有多个选项卡的web浏览器，每个选项卡可能都有一个不同于其他选项卡的新网站。 现在我要做的是在一个特定的选项卡上打印页面，当我尝试打印时，页面可能由多个页面组成。 这是我的代码，代码的问题是它只打印了一页，而最后一个选项卡已经打开。任何建议：

  //this is the printDocemnt from the toolbox
  private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
    {
        Font font1 = new Font("Arial", 16, FontStyle.Regular);
        e.Graphics.DrawString(rtb.Text, font1, Brushes.Black, 100, 100);//rtb.Text is a richtextbox object that i initialize in the beginning of the form

    }

    //this is the printbutton just a normal button
    private void PrintButton_Click(object sender, EventArgs e)
    {
        printDialog1.ShowDialog();
        printDocument1.Print();
    }

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我就是这样做的：打印文档包含以下代码：

        private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
    {
        Font font1 = new Font("Arial", 10, FontStyle.Regular);
        //e.Graphics.DrawString(tabsProperties[tabsProperties.IndexOf(new TabProperties(this.tabControl1.SelectedIndex))].TabHtml, font1, Brushes.Black, 100, 100);



        int charactersOnPage = 0;
        int linesPerPage = 0;

        // Sets the value of charactersOnPage to the number of characters 
        // of stringToPrint that will fit within the bounds of the page.
        e.Graphics.MeasureString(stringToPrint, font1,
            e.MarginBounds.Size, StringFormat.GenericTypographic,
            out charactersOnPage, out linesPerPage);

        // Draws the string within the bounds of the page
        e.Graphics.DrawString(stringToPrint, font1, Brushes.Black,
            e.MarginBounds, StringFormat.GenericTypographic);

        // Remove the portion of the string that has been printed.
        stringToPrint = stringToPrint.Substring(charactersOnPage);

        // Check to see if more pages are to be printed.
        e.HasMorePages = (stringToPrint.Length > 0);

    }

这是“打印”按钮：

   private void PrintButton_Click(object sender, EventArgs e)
    {
        stringToPrint = tabsProperties[tabsProperties.IndexOf(new TabProperties(this.tabControl1.SelectedIndex))].TabHtml;

        printDialog1.ShowDialog();
        printDocument1.Print();

    }

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如果您使用的是标准浏览器类型的对象，它应该有自己的打印方法。对于一个支持多个web浏览器实例的程序，如何有一个RichTextBox？RTB与浏览器的关系如何？我正在发送http请求并以html代码的形式检索数据。我没有使用渲染或webbroswer工具，并且在每个新选项卡上都创建了富文本框