C# 打印预览 PrintDocument打印、打印预览

        #region 打印预览#region 变量 常量//以下用户可自定义  //当前要打印文本的字体及字号  private const int HeadHeight = 40;private static readonly Font TableFont = new Font("Verdana", 10, FontStyle.Regular);private readonly SolidBrush _drawBrush = new SolidBrush(Color.Black);//表头字体  private readonly Font _headFont = new Font("Verdana", 20, FontStyle.Bold);//表头文字  private readonly int _yUnit = TableFont.Height * 2;public int TotalNum = 0;//以下为模块内部使用  private DataRow _dataRow;private DataTable _dataTable;private int _firstPrintRecordNumber;private string _headText = string.Empty;private int _pBottom;private int _pHeigh;//当前要所要打印的记录行数,由计算得到  private int _pageLeft;private int _pRight;private int _pageTop;private int _pWidth;private int _pageRecordNumber;private PrintDocument _printDocument;private PageSetupDialog _pageSetupDialog;private int _printRecordComplete;//每页打印的记录条数  private int _printRecordNumber;private int _printingPageNumber = 1;//第一页打印的记录条数  //与列名无关的统计数据行的类目数（如，总计，小计......）  private int _totalPage;private int[] _xUnit;#endregion/// <summary>  ///     打印  /// </summary>  /// <param name="dt">要打印的DataTable</param>  /// <param name="title">打印文件的标题</param>  public void Print(DataTable dt, string title){try{CreatePrintDocument(dt, title).Print();}catch (Exception ex){MessageBox.Show("打印错误，请检查打印设置！");}}  /// <summary>  ///     打印预览  /// </summary>  /// <param name="dt">要打印的DataTable</param>  /// <param name="title">打印文件的标题</param>  public void PrintPriview(DataTable dt, string title){try{var printPriview = new PrintPreviewDialog{Document = CreatePrintDocument(dt, title),WindowState = FormWindowState.Maximized};printPriview.ShowDialog();}catch (Exception ex){MessageBox.Show("打印错误，请检查打印设置！");}}public void PrintSetting(){try{_pageSetupDialog.ShowDialog();}catch (Exception ex){MessageBox.Show("打印错误，请检查打印设置！");}}  /// <summary>  ///     创建打印文件  /// </summary>  private PrintDocument CreatePrintDocument(DataTable dt, string title){_dataTable = dt;_headText = title;var pageSetup = new PageSetupDialog();_printDocument = new PrintDocument { DefaultPageSettings = pageSetup.PageSettings };_printDocument.DefaultPageSettings.Landscape = true; //设置打印横向还是纵向  //PLeft = 30; //DataTablePrinter.DefaultPageSettings.Margins.Left;  _pageTop = _printDocument.DefaultPageSettings.Margins.Top;//PRight = DataTablePrinter.DefaultPageSettings.Margins.Right;  _pBottom = _printDocument.DefaultPageSettings.Margins.Bottom;_pWidth = _printDocument.DefaultPageSettings.Bounds.Width;_pHeigh = _printDocument.DefaultPageSettings.Bounds.Height;_xUnit = new int[_dataTable.Columns.Count];_printRecordNumber = Convert.ToInt32((_pHeigh - _pageTop - _pBottom - _yUnit) / _yUnit);_firstPrintRecordNumber = Convert.ToInt32((_pHeigh - _pageTop - _pBottom - HeadHeight - _yUnit) / _yUnit);if (_dataTable.Rows.Count > _printRecordNumber){if ((_dataTable.Rows.Count - _firstPrintRecordNumber) % _printRecordNumber == 0){_totalPage = (_dataTable.Rows.Count - _firstPrintRecordNumber) / _printRecordNumber + 1;}else{_totalPage = (_dataTable.Rows.Count - _firstPrintRecordNumber) / _printRecordNumber + 2;}}else{_totalPage = 1;}_printDocument.PrintPage += PrintDocumentPrintPage;_printDocument.DocumentName = _headText;return _printDocument;}  /// <summary>  ///     打印当前页  /// </summary>  private void PrintDocumentPrintPage(object sende, PrintPageEventArgs @event)  {  int tableWith = 0;  string columnText;  var font = new StringFormat { Alignment = StringAlignment.Center };  var pen = new Pen(Brushes.Black, 1);//打印表格线格式  #region 设置列宽  foreach (DataRow dr in _dataTable.Rows)  {  for (int i = 0; i < _dataTable.Columns.Count; i++)  {  int colwidth = Convert.ToInt32(@event.Graphics.MeasureString(dr[i].ToString().Trim(), TableFont).Width);  if (colwidth > _xUnit[i])  {  _xUnit[i] = colwidth;  }  }  }  if (_printingPageNumber == 1)  {  for (int cols = 0; cols <= _dataTable.Columns.Count - 1; cols++)  {  columnText = _dataTable.Columns[cols].ColumnName.Trim();  int colwidth = Convert.ToInt32(@event.Graphics.MeasureString(columnText, TableFont).Width);  if (colwidth > _xUnit[cols])  {  _xUnit[cols] = colwidth;  }  }  }  for (int i = 0; i < _xUnit.Length; i++)  {  tableWith += _xUnit[i];  }  #endregion  _pageLeft = (@event.PageBounds.Width - tableWith) / 2;  int x = _pageLeft;  int y = _pageTop;  int stringY = _pageTop + (_yUnit - TableFont.Height) / 2;  int rowOfTop = _pageTop;  //第一页  if (_printingPageNumber == 1)  {  //打印表头  var arr = _headText.Split(new[] { "|" }, StringSplitOptions.RemoveEmptyEntries);  if (arr.Length > 1)  {  @event.Graphics.DrawString(arr[0],  _headFont,  _drawBrush,  new Point(@event.PageBounds.Width / 2, _pageTop), font);  }  //副标题  var subtitleHeight = 0;  for (int i = 1; i < arr.Length; i++)  {  @event.Graphics.DrawString(arr[i],  new Font("Verdana", 12, FontStyle.Regular),  _drawBrush,  new Point(@event.PageBounds.Width / 2, _pageTop + _headFont.Height),  font);  subtitleHeight += new Font("Verdana", 12, FontStyle.Regular).Height;  }  //设置为第一页时行数   if (_dataTable.Rows.Count < _firstPrintRecordNumber)  {  _pageRecordNumber = _dataTable.Rows.Count;  }  else  {  _pageRecordNumber = _firstPrintRecordNumber;  }  rowOfTop = y = (_pageTop + _headFont.Height + subtitleHeight + 10);  stringY = _pageTop + _headFont.Height + subtitleHeight + 10 + (_yUnit - TableFont.Height) / 2;  }  else  {  //计算,余下的记录条数是否还可以在一页打印,不满一页时为假  if (_dataTable.Rows.Count - _printRecordComplete >= _printRecordNumber)  {  _pageRecordNumber = _printRecordNumber;  }  else  {  _pageRecordNumber = _dataTable.Rows.Count - _printRecordComplete;  }  }  #region 列名  if (_printingPageNumber == 1 || _pageRecordNumber > TotalNum) //最后一页只打印统计行时不打印列名  {  //得到datatable的所有列名  for (int cols = 0; cols <= _dataTable.Columns.Count - 1; cols++)  {  columnText = _dataTable.Columns[cols].ColumnName.Trim();  int colwidth = Convert.ToInt32(@event.Graphics.MeasureString(columnText, TableFont).Width);  @event.Graphics.DrawString(columnText, TableFont, _drawBrush, x, stringY);  x += _xUnit[cols];  }  }  #endregion  @event.Graphics.DrawLine(pen, _pageLeft, rowOfTop, x, rowOfTop);  stringY += _yUnit;  y += _yUnit;  @event.Graphics.DrawLine(pen, _pageLeft, y, x, y);  //当前页面已经打印的记录行数  int printingLine = 0;  while (printingLine < _pageRecordNumber)  {  x = _pageLeft;  //确定要当前要打印的记录的行号  _dataRow = _dataTable.Rows[_printRecordComplete];  for (int cols = 0; cols <= _dataTable.Columns.Count - 1; cols++)  {  @event.Graphics.DrawString(_dataRow[cols].ToString().Trim(), TableFont, _drawBrush, x, stringY);  x += _xUnit[cols];  }  stringY += _yUnit;  y += _yUnit;  @event.Graphics.DrawLine(pen, _pageLeft, y, x, y);  printingLine += 1;  _printRecordComplete += 1;  if (_printRecordComplete >= _dataTable.Rows.Count)  {  @event.HasMorePages = false;  _printRecordComplete = 0;  }  }  @event.Graphics.DrawLine(pen, _pageLeft, rowOfTop, _pageLeft, y);  x = _pageLeft;  for (int cols = 0; cols < _dataTable.Columns.Count; cols++)  {  x += _xUnit[cols];  @event.Graphics.DrawLine(pen, x, rowOfTop, x, y);  }  _printingPageNumber += 1;  if (_printingPageNumber > _totalPage)  {  @event.HasMorePages = false;  _printingPageNumber = 1;  _printRecordComplete = 0;  }  else  {  @event.HasMorePages = true;  }  }  #endregionprivate void button1_Click(object sender, EventArgs e){PrintPriview(table, "Student");}

调用方法：

打印：new PrintHelper().Print(dataTable,title);

预览：new PrintHelper().PrintPriview(dataTable,title);

转载：http://blog.csdn.net/a497785609/article/details/71190960

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