C#调取打印机打印DataTable

素颜马尾好姑娘i 2023-08-17 17:03 55阅读 0赞

一、新建一个PrintService类，将打印的方法封装起来

public class PrintService
        {
            public PrintService()
            {
    
            }
    
            #region Members //成员
            public String printName = String.Empty;
            public Font prtTextFont = new Font("Verdana", 16);
            public Font prtTitleFont = new Font("宋体", 16);
            private String[] titles = new String[0];
            public String[] Titles
            {
                set
                {
                    titles = value as String[];
                    if (null == titles)
                    {
                        titles = new String[0];
                    }
                }
                get
                {
                    return titles;
                }
            }
            private Int32 left = 20;
            private Int32 top = 20;
            public Int32 Top { set { top = value; } get { return top; } }
            public Int32 Left { set { left = value; } get { return left; } }
            private DataTable printedTable;
            private Int32 pheight;
            private Int32 pWidth;
            private Int32 pindex;
            private Int32 curdgi;
            private Int32[] width;
            private Int32 rowOfDownDistance = 3;
            private Int32 rowOfUpDistance = 2;
    
            Int32 startColumnControls = 0;
            Int32 endColumnControls = 0;
    
            #endregion
    
            #region Method for PrintDataTable //打印数据集
            /// <summary>
            /// 打印数据集
            /// </summary>
            /// <param name="table">数据集</param>
            /// <returns></returns>
            public Boolean PrintDataTable(DataTable table)
            {
                PrintDocument prtDocument = new PrintDocument();
                try
                {
                    if (printName != String.Empty)
                    {
                        prtDocument.PrinterSettings.PrinterName = printName;
                    }
                    //prtDocument.DefaultPageSettings.Landscape = true;//设置打印方向为横向
                    prtDocument.OriginAtMargins = false;
                    PrintDialog prtDialog = new PrintDialog();
                    prtDialog.AllowSomePages = true;
                    prtDialog.ShowHelp = false;
                    prtDialog.Document = prtDocument;
                    if (DialogResult.OK != prtDialog.ShowDialog())
                    {
                        return false;
                    }
                    printedTable = table;
                    pindex = 0;
                    curdgi = 0;
                    width = new Int32[printedTable.Columns.Count];
                    pheight = prtDocument.PrinterSettings.DefaultPageSettings.Bounds.Bottom + 400;
                    //pheight = prtDocument.PrinterSettings.DefaultPageSettings.Bounds.Bottom;
                    pWidth = prtDocument.PrinterSettings.DefaultPageSettings.Bounds.Right;
                    prtDocument.PrintPage += new PrintPageEventHandler(docToPrint_PrintPage);
                    prtDocument.Print();
                }
                catch (InvalidPrinterException ex)
                {
                    MessageBox.Show("没有安装打印机");
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }
                prtDocument.Dispose();
                return true;
            }
            #endregion
    
            #region Handler for docToPrint_PrintPage //设置打印机开始打印的事件处理函数
            /// <summary>
            /// 设置打印机开始打印的事件处理函数
            /// </summary>
            /// <param name="sender"></param>
            /// <param name="ev"></param>
            private void docToPrint_PrintPage(object sender,
             System.Drawing.Printing.PrintPageEventArgs ev)//设置打印机开始打印的事件处理函数
            {
                Int32 x = left;
                Int32 y = top;
                Int32 rowOfTop = top;
                Int32 i;
                Pen pen = new Pen(Brushes.Black, 1);
                if (0 == pindex)
                {
                    for (i = 0; i < titles.Length; i++)
                    {
                        ev.Graphics.DrawString(titles[i], prtTitleFont, Brushes.Black, left, y + rowOfUpDistance);
                        y += prtTextFont.Height + rowOfDownDistance;
                    }
                    rowOfTop = y;
                    foreach (DataRow dr in printedTable.Rows)
                    {
                        for (i = 0; i < printedTable.Columns.Count; i++)
                        {
                            Int32 colwidth = Convert.ToInt16(ev.Graphics.MeasureString(dr[i].ToString().Trim(), prtTextFont).Width);
                            if (colwidth > width[i])
                            {
                                width[i] = colwidth;
                            }
                        }
                    }
                }
                for (i = endColumnControls; i < printedTable.Columns.Count; i++)
                {
                    String headtext = printedTable.Columns[i].ColumnName.Trim();
                    if (pindex == 0)
                    {
                        int colwidth = Convert.ToInt16(ev.Graphics.MeasureString(headtext, prtTextFont).Width);
                        if (colwidth > width[i])
                        {
                            width[i] = colwidth;
                        }
                    }
                    //判断宽是否越界
                    if (x + width[i] > pheight)
                    {
                        break;
                    }
                    ev.Graphics.DrawString(headtext, prtTextFont, Brushes.Black, x, y + rowOfUpDistance);
                    x += width[i];
                }
                startColumnControls = endColumnControls;
                if (i < printedTable.Columns.Count)
                {
                    endColumnControls = i;
                    ev.HasMorePages = true;
                }
                else
                {
                    endColumnControls = printedTable.Columns.Count;
                }
                ev.Graphics.DrawLine(pen, left, rowOfTop, x, rowOfTop);
                y += rowOfUpDistance + prtTextFont.Height + rowOfDownDistance;
                ev.Graphics.DrawLine(pen, left, y, x, y);
                //打印数据
                for (i = curdgi; i < printedTable.Rows.Count; i++)
                {
                    x = left;
                    for (Int32 j = startColumnControls; j < endColumnControls; j++)
                    {
                        ev.Graphics.DrawString(printedTable.Rows[i][j].ToString().Trim(), prtTextFont, Brushes.Black, x, y + rowOfUpDistance);
                        x += width[j];
                    }
                    y += rowOfUpDistance + prtTextFont.Height + rowOfDownDistance;
                    ev.Graphics.DrawLine(pen, left, y, x, y);
                    //判断高是否越界
                    if (y > pWidth - prtTextFont.Height - 400) //if (y > pWidth - prtTextFont.Height - 30)
                    {
                        break;
                    }
                }
                ev.Graphics.DrawLine(pen, left, rowOfTop, left, y);
                x = left;
                for (Int32 k = startColumnControls; k < endColumnControls; k++)
                {
                    x += width[k];
                    ev.Graphics.DrawLine(pen, x, rowOfTop, x, y);
                }
                //判断高是否越界
                if (y > pWidth - prtTextFont.Height - 400) //if (y > pWidth - prtTextFont.Height - 30) 
                {
                    pindex++; if (0 == startColumnControls)
                    {
                        curdgi = i + 1;
                    }
                    if (!ev.HasMorePages)
                    {
                        endColumnControls = 0;
                    }
                    ev.HasMorePages = true;
                }
            }
            #endregion
        }

二、调用PrintService打印表格

private void btnPrint_Click(object sender, EventArgs e)
            {
                PrintService ps = new PrintService();
                String name = "打印示例";
                ps.Titles = new string[] { name };//给打印的表格赋值名字
                
                DataTable dt=new DataTable(); 
                dt.Columns.Add("姓名",typeof(string));   //新建第一列
                dt.Columns.Add("年龄",typeof(int));      //新建第二列
                dt.Rows.Add("张三",23);                 //新建第一行，并赋值
                dt.Rows.Add("李四",25);                 //新建第二行，并赋值
                ps.PrintDataTable(dt);
            }