Question

我有几天试图解决我在C＃中遇到的这个大问题：我正在尝试打印21条（票据）票据格式，但纸卷有一个限制并占据了几页分割打印但我不能让它从页面跳转到打印文章＃17并继续到另一页与＃18，请帮助..

private void DrawItems(System.Drawing.Printing.PrintPageEventArgs e)
        {
            int linesprinted = 0;
            int linesperpage = 17;
            int numberitems = items.Count; //21

            //numberitems / linespage = 1.23 = 2 Pages True :)

            if (linesprinted <= linesperpage)
            {
                linesprinted++;
                e.HasMorePages = false;
            }
            else {
                linesprinted=0;
                e.HasMorePages = true;
            }

//print items
            OrderItem ordIt = new OrderItem('?');

            gfx.DrawString("C/P   DESCRIPCION                  TOTAL", new Font(fontName, fontSize, FontStyle.Regular), myBrush, leftMargin, YPosition(), new StringFormat());
            DrawEspacio();
            gfx.DrawString(DottedLine(), new Font(fontName, 9, FontStyle.Regular), myBrush, leftMargin, YPosition(), new StringFormat());
            count++;

            foreach (string item in items)
            {

                String ItemCantidad = ordIt.GetItemCantidad(item);
                String ItemPrice = ordIt.GetItemPrice(item);
                Int16 not_equal = 0;


                gfx.DrawString(ItemCantidad + "  x", new Font(fontName, fontSize, FontStyle.Regular), myBrush, leftMargin, YPosition(), new StringFormat());

                line = ordIt.GetItemUnitPrice(item);
                line = AlignRightText(line.Length) + line;

                gfx.DrawString("                 " + line, printFont, myBrush, leftMargin, YPosition(), new StringFormat());

                string name = ordIt.GetItemName(item);

                leftMargin = 0;
                if (name.Length > maxCharDescription)
                {
                    int currentChar = 0;
                    int itemLenght = name.Length;

                    while (itemLenght > maxCharDescription)
                    {
                        line = ordIt.GetItemName(item);
                        gfx.DrawString("         " + line.Substring(currentChar, maxCharDescription), new Font(fontName, fontSize, FontStyle.Regular), myBrush, leftMargin, YPosition(), new StringFormat());

                        count++;
                        not_equal++;
                        if (not_equal == 1)
                        {
                            gfx.DrawString(ItemPrice, new Font(fontName, fontSize, FontStyle.Regular), myBrush, leftMargin, YPosition(), new StringFormat());
                        }
                        currentChar += maxCharDescription;
                        itemLenght -= maxCharDescription;
                    }

                    line = ordIt.GetItemName(item);
                    gfx.DrawString("         " + line.Substring(currentChar, line.Length - currentChar), new Font(fontName, fontSize, FontStyle.Regular), myBrush, leftMargin, YPosition(), new StringFormat());
                    count++;
                    gfx.DrawString("-----", new Font(fontName, fontSize, FontStyle.Regular), myBrush, leftMargin, YPosition(), new StringFormat());
                    count++;
                }
                else
                {
                    gfx.DrawString("         " + ordIt.GetItemName(item), new Font(fontName, fontSize, FontStyle.Regular), myBrush, leftMargin, YPosition(), new StringFormat());
                    count++;
                    gfx.DrawString(ItemPrice, new Font(fontName, fontSize, FontStyle.Regular), myBrush, leftMargin, YPosition(), new StringFormat());
                    count++;
                    gfx.DrawString("-----", new Font(fontName, fontSize, FontStyle.Regular), myBrush, leftMargin, YPosition(), new StringFormat());
                    count++;
                }

            } //end foreach


            leftMargin = 0;
            gfx.DrawString(DottedLine(), new Font(fontName, 9, FontStyle.Regular), myBrush, leftMargin, YPosition(), new StringFormat());
            DrawEspacio();

        } //end function

Answer 1

我认为你做得不对。它应该是这样的：

    private void MyPrintDocument_PrintPage(object sender,
        System.Drawing.Printing.PrintPageEventArgs e)
    {
        bool more = DrawItems(e.Graphics);
        if (more == true)
            e.HasMorePages = true;
    }

因此，在PrintDocument Print事件之后，您调用方法来绘制项目，并在方法之外的变量中跟踪最后绘制的项目，因此当再次调用它时，知道从哪里开始从。当涉及到应该转到下一页的项目时，它将返回true。

System.Drawing＆amp; e.HasMorePages问题

1 个答案: