Question

我想使用PrintPreviewDialog打印所有项目的条形码。书面代码可以正常工作，但是问题出在第一页结尾，我叫e.HasMorePages = true，它创建第二页，但不能打印第二页。这意味着第二页为空/空白。如您在下面的图片中看到的，最后一行条形码自动被裁剪，不在第二页上打印剩余的条形码。请帮助如何在第二页上打印剩余的条形码。

如上图所示，最后一行自动被裁剪，第二页不打印，页面为空。

PrintPreviewDialog代码；

pd = new PrintDocument();
                pd.PrintPage += new PrintPageEventHandler(this.PrintBarcodeEvent_PrintPage);

                System.Windows.Forms.PrintDialog pdd = new System.Windows.Forms.PrintDialog();
                pdd.Document = pd;

                System.Windows.Forms.DialogResult result = pdd.ShowDialog();

                if (result == System.Windows.Forms.DialogResult.OK)
                {
                    System.Windows.Forms.PrintPreviewDialog pp = new System.Windows.Forms.PrintPreviewDialog();
                    pp.Document = pd;
                    result = pp.ShowDialog();

                    //pd.Print();
                }

事件：

 // The PrintPage event is raised for each page to be printed. 
        private void PrintBarcodeEvent_PrintPage(object sender, PrintPageEventArgs e)
        {
            int startX = 5;
            int startY = 5;

            Database db = new Database();
            db.DBOpen();

            int NBbarcode_perLine = 5;
            int numbarcode = 0;

            int barcodePerPage = 35;
            int countBarcodePerPage = 0;

            for (int i = 0; i < listTobePrint.Count; i++)
            {
                String code = listTobePrint[i].Code;
                String name = db.GetByValue(Database.TABLE_ITEMS, Database.CODE_ITEMS, code, 2);
                String price = db.GetByValueForInt(Database.TABLE_ITEMS, Database.CODE_ITEMS, code, 8);

                Font printFont = new Font("Arial", 10.0f);

                e.Graphics.DrawString("Phulkari by VIRSA", printFont, System.Drawing.Brushes.Black,
                  startX, startY, new StringFormat());

                int x2 = startX + 3;
                int y2 = startY + 15;

                e.Graphics.DrawImage(Util.ImageWpfToGDI(Util.GenerateBarcode(code)), x2, y2, 100, 50);

                int x3 = startX;
                int y3 = y2 + 50;

                e.Graphics.DrawString(code, printFont, System.Drawing.Brushes.Black,
                    x3, y3, new StringFormat());

                int x4 = startX;
                int y4 = y3 + 15;

                e.Graphics.DrawString(name, printFont, System.Drawing.Brushes.Black,
                   x4, y4, new StringFormat());

                int x5 = startX;
                int y5 = y4 + 15;

                e.Graphics.DrawString("Rs." + price, printFont, System.Drawing.Brushes.Black,
                   x5, y5, new StringFormat());

                numbarcode++;
                countBarcodePerPage++;

                if (numbarcode < NBbarcode_perLine)
                    startX += 150;
                else
                {
                    startX = 5;
                    startY += 150; // space between 2 barcode in vertical (upper left). you have to adjust)
                    numbarcode = 0;
                }

                if (countBarcodePerPage >= barcodePerPage)
                {
                    //MessageBox.Show(countBarcodePerPage.ToString());

                    e.HasMorePages = true;
                    //startX = 5;
                    //startY = 5;
                } else
                {
                    e.HasMorePages = false;
                }
            }
            db.DBClose();
            listTobePrint.Clear();
        }

Answer 1

您必须创建全局变量countbarcode（不是PrintPage本地变量）或静态并初始化Tozéro。每次将e.HasMorePages设置为true时，都会调用事件PrintPage 对于测试而言，这不是问题，但我认为您应该将db.open放在事件BeginPrint中，将db.close放在事件EndPrint中。每次打印页面时都会打开和关闭数据库。（也许它并不是很重要，但是您避免重新创建相同的变量db并浪费内存）

    private void PrintBarcodeEvent_PrintPage(object sender, PrintPageEventArgs e)
    {
        int startX = 5;
        int startY = 5;

        Database db = new Database();
        db.DBOpen();

        int NBbarcode_perLine = 5;
        int numbarcode = 0;

        int barcodePerPage = 35;
        int countBarcodePerPage = 0;
        int totalcodebar = listTobePrint.Count;

        for (int i = 0; i < barcodePerPage; i++)
        {
            String code = listTobePrint[countbarcode].Code;
            String name = db.GetByValue(Database.TABLE_ITEMS, Database.CODE_ITEMS, code, 2);
            String price = db.GetByValueForInt(Database.TABLE_ITEMS, Database.CODE_ITEMS, code, 8);

            Font printFont = new Font("Arial", 10.0f);

            e.Graphics.DrawString("Phulkari by VIRSA", printFont, System.Drawing.Brushes.Black,
              startX, startY, new StringFormat());

            int x2 = startX + 3;
            int y2 = startY + 15;

            e.Graphics.DrawImage(Util.ImageWpfToGDI(Util.GenerateBarcode(code)), x2, y2, 100, 50);

            int x3 = startX;
            int y3 = y2 + 50;

            e.Graphics.DrawString(code, printFont, System.Drawing.Brushes.Black,
                x3, y3, new StringFormat());

            int x4 = startX;
            int y4 = y3 + 15;

            e.Graphics.DrawString(name, printFont, System.Drawing.Brushes.Black,
               x4, y4, new StringFormat());

            int x5 = startX;
            int y5 = y4 + 15;

            e.Graphics.DrawString("Rs." + price, printFont, System.Drawing.Brushes.Black,
               x5, y5, new StringFormat());

            numbarcode++;
            countbarcode++;

            if (numbarcode < NBbarcode_perLine)
                startX += 150;
            else
            {
                startX = 5;
                startY += 150; // space between 2 barcode in vertical (upper left). you have to adjust)
                numbarcode = 0;
            }

            if (countbarcode == totalcodebar) break;

            if (i == barcodePerPage - 1)
            {
                    db.DBClose();
                    e.HasMorePages = true;
                    return;
            }
        }
        e.HasMorePages = false;
        db.DBClose();
        listTobePrint.Clear();
    }

e.HasMorePages不在PrintPreviewDialog上打印第二页

1 个答案: