printdgv.cs

这是一个图书馆管理用的简化系统

using System;
using System.Collections.Generic;
using System.Windows.Forms;
using System.Drawing;
using System.Collections;
using System.Data;
using System.Text;

namespace BMS
{
    class PrintDGV
    {
        private static StringFormat StrFormat;  // Holds content of a TextBox Cell to write by DrawString
        private static StringFormat StrFormatComboBox; // Holds content of a Boolean Cell to write by DrawImage
        private static Button CellButton;       // Holds the Contents of Button Cell
        private static CheckBox CellCheckBox;   // Holds the Contents of CheckBox Cell 
        private static ComboBox CellComboBox;   // Holds the Contents of ComboBox Cell

        private static int TotalWidth;          // Summation of Columns widths
        private static int RowPos;              // Position of currently printing row 
        private static bool NewPage;            // Indicates if a new page reached
        private static int PageNo;              // Number of pages to print
        private static ArrayList ColumnLefts = new ArrayList();  // Left Coordinate of Columns
        private static ArrayList ColumnWidths = new ArrayList(); // Width of Columns
        private static ArrayList ColumnTypes = new ArrayList();  // DataType of Columns
        private static int CellHeight;          // Height of DataGrid Cell
        private static int RowsPerPage;         // Number of Rows per Page
        private static System.Drawing.Printing.PrintDocument printDoc =
                       new System.Drawing.Printing.PrintDocument();  // PrintDocumnet Object used for printing

        private static string PrintTitle = "";  // Header of pages
        private static DataGridView dgv;        // Holds DataGridView Object to print its contents
        private static List<string> SelectedColumns = new List<string>();   // The Columns Selected by user to print.
        private static List<string> AvailableColumns = new List<string>();  // All Columns avaiable in DataGrid 
        private static bool PrintAllRows = true;   // True = print all rows,  False = print selected rows    
        private static bool FitToPageWidth = true; // True = Fits selected columns to page width ,  False = Print columns as showed    
        private static int HeaderHeight = 0;

        public static void Print_DataGridView(DataGridView dgv1)
        {
            PrintPreviewDialog ppvw;
            try
            {
                // Getting DataGridView object to print
                dgv = dgv1;

                // Getting all Coulmns Names in the DataGridView
                AvailableColumns.Clear();
                foreach (DataGridViewColumn c in dgv.Columns)
                {
                    if (!c.Visible) continue;
                    AvailableColumns.Add(c.HeaderText);
                }

                // Showing the PrintOption Form
              
                Form1 dlg = new Form1(AvailableColumns);
                if (dlg.ShowDialog() != DialogResult.OK) return;

                PrintTitle = dlg.PrintTitle;
                PrintAllRows = dlg.PrintAllRows;
                FitToPageWidth = dlg.FitToPageWidth;
                SelectedColumns = dlg.GetSelectedColumns();

                RowsPerPage = 0;

                ppvw = new PrintPreviewDialog();
                ppvw.Document = printDoc;

                // Showing the Print Preview Page
                printDoc.BeginPrint += new System.Drawing.Printing.PrintEventHandler(PrintDoc_BeginPrint);
                printDoc.PrintPage += new System.Drawing.Printing.PrintPageEventHandler(PrintDoc_PrintPage);
                if (ppvw.ShowDialog() != DialogResult.OK)
                {
                    printDoc.BeginPrint -= new System.Drawing.Printing.PrintEventHandler(PrintDoc_BeginPrint);
                    printDoc.PrintPage -= new System.Drawing.Printing.PrintPageEventHandler(PrintDoc_PrintPage);
                    return;
                }

                // Printing the Documnet
                printDoc.Print();
                printDoc.BeginPrint -= new System.Drawing.Printing.PrintEventHandler(PrintDoc_BeginPrint);
                printDoc.PrintPage -= new System.Drawing.Printing.PrintPageEventHandler(PrintDoc_PrintPage);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
            finally
            {

            }
        }

        private static void PrintDoc_BeginPrint(object sender,
                    System.Drawing.Printing.PrintEventArgs e)
        {
            try
            {
                // Formatting the Content of Text Cell to print
                StrFormat = new StringFormat();
                StrFormat.Alignment = StringAlignment.Near;
                StrFormat.LineAlignment = StringAlignment.Center;
                StrFormat.Trimming = StringTrimming.EllipsisCharacter;

                // Formatting the Content of Combo Cells to print
                StrFormatComboBox = new StringFormat();
                StrFormatComboBox.LineAlignment = StringAlignment.Center;
                StrFormatComboBox.FormatFlags = StringFormatFlags.NoWrap;
                StrFormatComboBox.Trimming = StringTrimming.EllipsisCharacter;

                ColumnLefts.Clear();
                ColumnWidths.Clear();
                ColumnTypes.Clear();
                CellHeight = 0;
                RowsPerPage = 0;

                // For various column types
                CellButton = new Button();
                CellCheckBox = new CheckBox();
                CellComboBox = new ComboBox();

                // Calculating Total Widths
                TotalWidth = 0;
                foreach (DataGridViewColumn GridCol in dgv.Columns)
                {
                    if (!GridCol.Visible) continue;
                    if (!PrintDGV.SelectedColumns.Contains(GridCol.HeaderText)) continue;
                    TotalWidth += GridCol.Width;
                }
                PageNo = 1;
                NewPage = true;
                RowPos = 0;
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }

        private static void PrintDoc_PrintPage(object sender,
                    System.Drawing.Printing.PrintPageEventArgs e)
        {
            int tmpWidth, i;
            int tmpTop = e.MarginBounds.Top;
            int tmpLeft = e.MarginBounds.Left;

            try
            {
                // Before starting first page, it saves Width & Height of Headers and CoulmnType
                if (PageNo == 1)
                {
                    foreach (DataGridViewColumn GridCol in dgv.Columns)
                    {
                        if (!GridCol.Visible) continue;
                        // Skip if the current column not selected
                        if (!PrintDGV.SelectedColumns.Contains(GridCol.HeaderText)) continue;

                        // Detemining whether the columns are fitted to page or not.
                        if (FitToPageWidth)
                            tmpWidth = (int)(Math.Floor((double)((double)GridCol.Width /
                                       (double)TotalWidth * (double)TotalWidth *
                                       ((double)e.MarginBounds.Width / (double)TotalWidth))));
                        else
                            tmpWidth = GridCol.Width;

                        HeaderHeight = (int)(e.Graphics.MeasureString(GridCol.HeaderText,
                                    GridCol.InheritedStyle.Font, tmpWidth).Height) + 11;

                        // Save width & height of headres and ColumnType
                        ColumnLefts.Add(tmpLeft);
                        ColumnWidths.Add(tmpWidth);
                        ColumnTypes.Add(GridCol.GetType());
                        tmpLeft += tmpWidth;
                    }
                }

                // Printing Current Page, Row by Row
                while (RowPos <= dgv.Rows.Count - 1)
                {
                    DataGridViewRow GridRow = dgv.Rows[RowPos];
                    if (GridRow.IsNewRow || (!PrintAllRows && !GridRow.Selected))
                    {
                        RowPos++;
                        continue;