printdgv.cs

这是一个图书馆管理用的简化系统

                    }

                    CellHeight = GridRow.Height;

                    if (tmpTop + CellHeight >= e.MarginBounds.Height + e.MarginBounds.Top)
                    {
                        DrawFooter(e, RowsPerPage);
                        NewPage = true;
                        PageNo++;
                        e.HasMorePages = true;
                        return;
                    }
                    else
                    {
                        if (NewPage)
                        {
                            // Draw Header
                            e.Graphics.DrawString(PrintTitle, new Font(dgv.Font, FontStyle.Bold),
                                    Brushes.Black, e.MarginBounds.Left, e.MarginBounds.Top -
                            e.Graphics.MeasureString(PrintTitle, new Font(dgv.Font,
                                    FontStyle.Bold), e.MarginBounds.Width).Height - 13);

                            String s = DateTime.Now.ToLongDateString() + " " + DateTime.Now.ToShortTimeString();

                            e.Graphics.DrawString(s, new Font(dgv.Font, FontStyle.Bold),
                                    Brushes.Black, e.MarginBounds.Left + (e.MarginBounds.Width -
                                    e.Graphics.MeasureString(s, new Font(dgv.Font,
                                    FontStyle.Bold), e.MarginBounds.Width).Width), e.MarginBounds.Top -
                                    e.Graphics.MeasureString(PrintTitle, new Font(new Font(dgv.Font,
                                    FontStyle.Bold), FontStyle.Bold), e.MarginBounds.Width).Height - 13);

                            // Draw Columns
                            tmpTop = e.MarginBounds.Top;
                            i = 0;
                            foreach (DataGridViewColumn GridCol in dgv.Columns)
                            {
                                if (!GridCol.Visible) continue;
                                if (!PrintDGV.SelectedColumns.Contains(GridCol.HeaderText))
                                    continue;

                                e.Graphics.FillRectangle(new SolidBrush(Color.LightGray),
                                    new Rectangle((int)ColumnLefts[i], tmpTop,
                                    (int)ColumnWidths[i], HeaderHeight));

                                e.Graphics.DrawRectangle(Pens.Black,
                                    new Rectangle((int)ColumnLefts[i], tmpTop,
                                    (int)ColumnWidths[i], HeaderHeight));

                                e.Graphics.DrawString(GridCol.HeaderText, GridCol.InheritedStyle.Font,
                                    new SolidBrush(GridCol.InheritedStyle.ForeColor),
                                    new RectangleF((int)ColumnLefts[i], tmpTop,
                                    (int)ColumnWidths[i], HeaderHeight), StrFormat);
                                i++;
                            }
                            NewPage = false;
                            tmpTop += HeaderHeight;
                        }

                        // Draw Columns Contents
                        i = 0;
                        foreach (DataGridViewCell Cel in GridRow.Cells)
                        {
                            if (!Cel.OwningColumn.Visible) continue;
                            if (!SelectedColumns.Contains(Cel.OwningColumn.HeaderText))
                                continue;

                            // For the TextBox Column
                            if (((Type)ColumnTypes[i]).Name == "DataGridViewTextBoxColumn" ||
                                ((Type)ColumnTypes[i]).Name == "DataGridViewLinkColumn")
                            {
                                e.Graphics.DrawString(Cel.Value.ToString(), Cel.InheritedStyle.Font,
                                        new SolidBrush(Cel.InheritedStyle.ForeColor),
                                        new RectangleF((int)ColumnLefts[i], (float)tmpTop,
                                        (int)ColumnWidths[i], (float)CellHeight), StrFormat);
                            }
                            // For the Button Column
                            else if (((Type)ColumnTypes[i]).Name == "DataGridViewButtonColumn")
                            {
                                CellButton.Text = Cel.Value.ToString();
                                CellButton.Size = new Size((int)ColumnWidths[i], CellHeight);
                                Bitmap bmp = new Bitmap(CellButton.Width, CellButton.Height);
                                CellButton.DrawToBitmap(bmp, new Rectangle(0, 0,
                                        bmp.Width, bmp.Height));
                                e.Graphics.DrawImage(bmp, new Point((int)ColumnLefts[i], tmpTop));
                            }
                            // For the CheckBox Column
                            else if (((Type)ColumnTypes[i]).Name == "DataGridViewCheckBoxColumn")
                            {
                                CellCheckBox.Size = new Size(14, 14);
                                CellCheckBox.Checked = (bool)Cel.Value;
                                Bitmap bmp = new Bitmap((int)ColumnWidths[i], CellHeight);
                                Graphics tmpGraphics = Graphics.FromImage(bmp);
                                tmpGraphics.FillRectangle(Brushes.White, new Rectangle(0, 0,
                                        bmp.Width, bmp.Height));
                                CellCheckBox.DrawToBitmap(bmp,
                                        new Rectangle((int)((bmp.Width - CellCheckBox.Width) / 2),
                                        (int)((bmp.Height - CellCheckBox.Height) / 2),
                                        CellCheckBox.Width, CellCheckBox.Height));
                                e.Graphics.DrawImage(bmp, new Point((int)ColumnLefts[i], tmpTop));
                            }
                            // For the ComboBox Column
                            else if (((Type)ColumnTypes[i]).Name == "DataGridViewComboBoxColumn")
                            {
                                CellComboBox.Size = new Size((int)ColumnWidths[i], CellHeight);
                                Bitmap bmp = new Bitmap(CellComboBox.Width, CellComboBox.Height);
                                CellComboBox.DrawToBitmap(bmp, new Rectangle(0, 0,
                                        bmp.Width, bmp.Height));
                                e.Graphics.DrawImage(bmp, new Point((int)ColumnLefts[i], tmpTop));
                                e.Graphics.DrawString(Cel.Value.ToString(), Cel.InheritedStyle.Font,
                                        new SolidBrush(Cel.InheritedStyle.ForeColor),
                                        new RectangleF((int)ColumnLefts[i] + 1, tmpTop, (int)ColumnWidths[i]
                                        - 16, CellHeight), StrFormatComboBox);
                            }
                            // For the Image Column
                            else if (((Type)ColumnTypes[i]).Name == "DataGridViewImageColumn")
                            {
                                Rectangle CelSize = new Rectangle((int)ColumnLefts[i],
                                        tmpTop, (int)ColumnWidths[i], CellHeight);
                                Size ImgSize = ((Image)(Cel.FormattedValue)).Size;
                                e.Graphics.DrawImage((Image)Cel.FormattedValue,
                                        new Rectangle((int)ColumnLefts[i] + (int)((CelSize.Width - ImgSize.Width) / 2),
                                        tmpTop + (int)((CelSize.Height - ImgSize.Height) / 2),
                                        ((Image)(Cel.FormattedValue)).Width, ((Image)(Cel.FormattedValue)).Height));

                            }

                            // Drawing Cells Borders 
                            e.Graphics.DrawRectangle(Pens.Black, new Rectangle((int)ColumnLefts[i],
                                    tmpTop, (int)ColumnWidths[i], CellHeight));

                            i++;

                        }
                        tmpTop += CellHeight;
                    }

                    RowPos++;
                    // For the first page it calculates Rows per Page
                    if (PageNo == 1) RowsPerPage++;
                }

                if (RowsPerPage == 0) return;

                // Write Footer (Page Number)
                DrawFooter(e, RowsPerPage);

                e.HasMorePages = false;
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        private static void DrawFooter(System.Drawing.Printing.PrintPageEventArgs e,
                    int RowsPerPage)
        {
            double cnt = 0;

            // Detemining rows number to print
            if (PrintAllRows)
            {
                if (dgv.Rows[dgv.Rows.Count - 1].IsNewRow)
                    cnt = dgv.Rows.Count - 2; // When the DataGridView doesn't allow adding rows
                else
                    cnt = dgv.Rows.Count - 1; // When the DataGridView allows adding rows
            }
            else
                cnt = dgv.SelectedRows.Count;

            // Writing the Page Number on the Bottom of Page
            string PageNum = " 第 " + PageNo.ToString()
                           + " 页，共 " + Math.Ceiling((double)(cnt / RowsPerPage)).ToString()
                           + " 页";

            e.Graphics.DrawString(PageNum, dgv.Font, Brushes.Black,
                e.MarginBounds.Left + (e.MarginBounds.Width -
                e.Graphics.MeasureString(PageNum, dgv.Font,
                e.MarginBounds.Width).Width) / 2, e.MarginBounds.Top +
                e.MarginBounds.Height + 31);
        }
    }
}