c# - 如何打印第一页的末尾

Question

嗯，我有一个打印 DataGridView 的系统。在某些情况下，DataGridView 超出了页面的限制，我丢失了最后几行，但我不能丢失这些行。我已经尝试使用e.HasMorePages，但是我得到了打印页面的无限循环...这是我的代码，有些内容是葡萄牙语的，这是因为我是巴西人。

private void pd_PrintPage(object sender, PrintPageEventArgs ev)
    {
            StringFormat stringFormat = new StringFormat();
            stringFormat.Alignment = StringAlignment.Center;
            stringFormat.LineAlignment = StringAlignment.Center;
            string header = label1.Text;
            Graphics g = ev.Graphics;
            Font font = new Font("Times New Roman", 10, FontStyle.Regular);
            Pen pen = new Pen(Color.Black);
            float fontHeigth = font.GetHeight();
            int i = 1;
            Pen pe = new Pen(Color.Black, 1);
            foreach (DataGridViewRow row in dataGridView1.Rows)
            {

                if (i < dataGridView1.Rows.Count)
                {
                    g.DrawLine(pe, 10, startY + fontHeigth + 2 + offset, 779, startY + fontHeigth + 2 + offset);
                }
                g.DrawString(Convert.ToString(row.Cells["day"].Value), font, new SolidBrush(Color.Black), startX + 2, startY + offset);
                offset = offset + (int)fontHeigth + 5;
                offsettotal = offsettotal + (int)fontHeigth + 5;
                i++;
            }

            foreach (DataGridViewRow row in dataGridView1.Rows)
            {
                g.DrawString(Convert.ToString(row.Cells["hist"].Value), font, new SolidBrush(Color.Black), 110, startY + offset1);
                offset1 = offset1 + (int)fontHeigth + 5;
                offsettotal = offsettotal + (int)fontHeigth + 5;
            }

            foreach (DataGridViewRow row in dataGridView1.Rows)
            {
                g.DrawString(Convert.ToString(row.Cells["descricao"].Value), font, new SolidBrush(Color.Black), 340, startY + offset2);
                offset2 = offset2 + (int)fontHeigth + 5;
                offsettotal = offsettotal + (int)fontHeigth + 5;
            }
            foreach (DataGridViewRow row in dataGridView1.Rows)
            {
                g.DrawString(Convert.ToString(row.Cells["empresa"].Value), font, new SolidBrush(Color.Black), 480, startY + offset3);
                offset3 = offset3 + (int)fontHeigth + 5;
                offsettotal = offsettotal + (int)fontHeigth + 5;
            }
            double total = 0;
            foreach (DataGridViewRow row in dataGridView1.Rows)
            {
                string valor = Convert.ToString(row.Cells["valor"].Value);

                Double value;
                if (Double.TryParse(valor, out value))
                    valor = String.Format(System.Globalization.CultureInfo.CurrentCulture, "{0:C2}", value);
                else
                    valor = String.Empty;

                g.DrawString(valor, font, new SolidBrush(Color.Black), 670, startY + offset4);
                offset4 = offset4 + (int)fontHeigth + 5;
                offsettotal = offsettotal + (int)fontHeigth + 5;
                total = total + value;
            }

            string tot = total.ToString();

            Double value1;
            if (Double.TryParse(tot, out value1))
                tot = String.Format(System.Globalization.CultureInfo.CurrentCulture, "{0:C2}", value1);
            else
                tot = String.Empty;

            g.DrawString("Total de créditos: ", new Font("Times New Roman", 11, FontStyle.Underline), new SolidBrush(Color.Black), 550, startY + offset - 20);
            g.DrawString(tot, new Font("Times New Roman", 11, FontStyle.Underline), new SolidBrush(Color.Black), 670, startY + offset - 20);
            g.DrawLine(new Pen(Color.Black), 10, startY + 24 + offset, 779, startY + 24 + offset);
            Image img = Properties.Resources.logo_ropy_novo;
            img = resizeImage(img, new Size(250, 80));
            if (!(offset > ev.MarginBounds.Bottom))
            {
                g.DrawImage(img, new Point(10, 10));
                g.DrawString(header, new Font("Calibri", 10), new SolidBrush(Color.Black), 425, 10, stringFormat);
            }
            Font fnt = new Font("Calibri", 14);

            Pen p = new Pen(Color.Black, 4);
            p.StartCap = LineCap.Round;
            p.EndCap = LineCap.ArrowAnchor;
            g.DrawLine(p, 10, 125, 22, 125);
            g.DrawString("Créditos", new Font("Times New Roman", 15, FontStyle.Italic), new SolidBrush(Color.Black), 24, 114);
            g.DrawLine(new Pen(Color.Black), 10, 137, 779, 137);
            g.DrawString("Dia", new Font("Times New Roman", 14), new SolidBrush(Color.Black), 10, 140);
            g.DrawString("Histórico", new Font("Times New Roman", 13), new SolidBrush(Color.Black), 110, 140);
            g.DrawString("Descrição", new Font("Times New Roman", 13), new SolidBrush(Color.Black), 340, 140);
            g.DrawString("Empresa", new Font("Times New Roman", 13), new SolidBrush(Color.Black), 480, 140);
            g.DrawLine(new Pen(Color.Black), 108, 137, 108, startY + offset - fontHeigth - 7);
            g.DrawLine(new Pen(Color.Black), 338, 137, 338, startY + offset - fontHeigth - 7);
            g.DrawLine(new Pen(Color.Black), 478, 137, 478, startY + offset - fontHeigth - 7);
            g.DrawLine(new Pen(Color.Black), 10, 137, 10, startY + offset - fontHeigth - 7);
            g.DrawLine(new Pen(Color.Black), 668, 137, 668, startY + offset);
            g.DrawLine(new Pen(Color.Black), 779, 137, 779, startY + offset);
            g.DrawString("Valor", new Font("Times New Roman", 13), new SolidBrush(Color.Black), 670, 140);

            int y = startY + offset;
            g.DrawLine(p, 10, y + 12, 22, y + 12);
            g.DrawString("Débitos", new Font("Times New Roman", 15, FontStyle.Italic), new SolidBrush(Color.Black), 24, y);
            g.DrawLine(new Pen(Color.Black), 668, y, 779, y);
            g.DrawString("Dia", new Font("Times New Roman", 14), new SolidBrush(Color.Black), 10, y + 26);
            g.DrawString("Histórico", new Font("Times New Roman", 13), new SolidBrush(Color.Black), 110, y + 26);
            g.DrawString("Descrição", new Font("Times New Roman", 13), new SolidBrush(Color.Black), 340, y + 26);
            g.DrawString("Empresa", new Font("Times New Roman", 13), new SolidBrush(Color.Black), 480, y + 26);
            p.Dispose();
            g.DrawString("Valor", new Font("Times New Roman", 13), new SolidBrush(Color.Black), 670, y + 25);

            fontHeigth = font.GetHeight();
            startX = 10;
            startY = 135 + offset + 23;
            offset = 40;
            offset1 = 40;
            offset2 = 40;
            offset3 = 40;
            offset4 = 40;
            i = 1;
            foreach (DataGridViewRow row in dataGridView2.Rows)
            {
                if (i < dataGridView2.Rows.Count)
                {
                    g.DrawLine(pe, 10, startY + fontHeigth + 2 + offset, 779, startY + fontHeigth + 2 + offset);
                }
                g.DrawString(Convert.ToString(row.Cells["day"].Value), font, new SolidBrush(Color.Black), startX + 2, startY + offset);
                offset = offset + (int)fontHeigth + 5;
                offsettotal = offsettotal + (int)fontHeigth + 5;
                i++;
            }

            foreach (DataGridViewRow row in dataGridView2.Rows)
            {
                g.DrawString(Convert.ToString(row.Cells["hist"].Value), font, new SolidBrush(Color.Black), 110, startY + offset1);
                offset1 = offset1 + (int)fontHeigth + 5;
                offsettotal = offsettotal + (int)fontHeigth + 5;
            }

            foreach (DataGridViewRow row in dataGridView2.Rows)
            {
                g.DrawString(Convert.ToString(row.Cells["descricao"].Value), font, new SolidBrush(Color.Black), 340, startY + offset2);
                offset2 = offset2 + (int)fontHeigth + 5;
                offsettotal = offsettotal + (int)fontHeigth + 5;
            }
            foreach (DataGridViewRow row in dataGridView2.Rows)
            {
                g.DrawString(Convert.ToString(row.Cells["empresa"].Value), font, new SolidBrush(Color.Black), 480, startY + offset3);
                offset3 = offset3 + (int)fontHeigth + 5;
                offsettotal = offsettotal + (int)fontHeigth + 5;
            }

            double totaldb = 0;
            foreach (DataGridViewRow row in dataGridView2.Rows)
            {
                string valor = Convert.ToString(row.Cells["valor"].Value);

                Double value;
                if (Double.TryParse(valor, out value))
                    valor = String.Format(System.Globalization.CultureInfo.CurrentCulture, "{0:C2}", value);
                else
                    valor = String.Empty;

                g.DrawString(valor, font, new SolidBrush(Color.Black), 670, startY + offset4);
                offset4 = offset4 + (int)fontHeigth + 5;
                offsettotal = offsettotal + (int)fontHeigth + 5;
                totaldb = totaldb + value;
            }

            string totdb = totaldb.ToString();

            Double valuedb;
            if (Double.TryParse(totdb, out valuedb))
                totdb = String.Format(System.Globalization.CultureInfo.CurrentCulture, "{0:C2}", valuedb);
            else
                totdb = String.Empty;

            g.DrawLine(new Pen(Color.Black), 10, startY + 1, 10, startY + offset - 23);
            g.DrawLine(new Pen(Color.Black), 108, startY + 1, 108, startY + offset - 23);
            g.DrawLine(new Pen(Color.Black), 338, startY + 1, 338, startY + offset - 23);
            g.DrawLine(new Pen(Color.Black), 478, startY + 1, 478, startY + offset - 23);
            g.DrawLine(new Pen(Color.Black), 668, startY + 1, 668, startY + offset);
            g.DrawLine(new Pen(Color.Black), 779, startY + 1, 779, startY + offset);

            g.DrawString("Total de débitos: ", new Font("Times New Roman", 11, FontStyle.Underline), new SolidBrush(Color.Black), 550, startY + offset - 20);
            g.DrawString(totdb, new Font("Times New Roman", 11, FontStyle.Underline), new SolidBrush(Color.Black), 670, startY + offset - 20);
            g.DrawLine(new Pen(Color.Black), 668, offset + startY, 779, offset + startY);

    }

这是 OneNote 中的实际页面: http://prntscr.com/2ya7xd

Answer 1

ev.MarginBounds.Height 为您提供页边距内页面的高度。 DataGridViewRow.Height 为您提供单独的行高度。使用这些信息，您可以检查在打印每页时是否需要更多页数。

此外，逐行绘制可以让您更好地控制打印。请参阅this文章了解更多信息。

示例代码:

有类级别变量int rowIndex=0;

int rowTop=ev.MarginBounds.Top;
bool needMorePages=false;
while (rowIndex<= dataGridView1.Rows.Count - 1)
{
    DataGridViewRow row = dataGridView1.Rows[rowIndex];
    if(rowTop + row.Height >= ev.MarginBounds.Top + ev.MarginBounds.Height)
    {
        needMorePages = true;
        break;
    }
    foreach (DataGridViewCell cell in row.Cells)
    {
        //draw cell content
    }
    rowTop += row.Height;
    rowIndex++;
}
ev.HasMorePages = needMorePages;