C# 直接打印指定路径文件 + 可选择指定打印机

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        public void PrinteTicketWithPath(string path)        {                try             {                streamToPrint = new StreamReader (path);                try                 {                    printFont = new Font("Arial", 10);                    PrintDocument pd = new PrintDocument();                    if (core.PrinterTicket != null)                    {                        pd.PrinterSettings.PrinterName = core.PrinterTicket;                    }                    pd.PrintPage += new PrintPageEventHandler(pd_PrintPage);                    // Print the document.                    pd.Print();                }                 finally                 {                    streamToPrint.Close() ;                }            }             catch(Exception ex)             {                 MessageBox.Show(ex.Message);            }        }        // The PrintPage event is raised for each page to be printed.        private void pd_PrintPage(object sender, PrintPageEventArgs ev)        {            float linesPerPage = 0;            float yPos = 0;            int count = 0;            float leftMargin = ev.MarginBounds.Left;            float topMargin = ev.MarginBounds.Top;            String line = null;            // Calculate the number of lines per page.            linesPerPage = ev.MarginBounds.Height /                printFont.GetHeight(ev.Graphics);            // Iterate over the file, printing each line.            while (count < linesPerPage &&                ((line = streamToPrint.ReadLine()) != null))            {                yPos = topMargin + (count * printFont.GetHeight(ev.Graphics));                ev.Graphics.DrawString(line, printFont, Brushes.Black,                    leftMargin, yPos, new StringFormat());                count++;            }            // If more lines exist, print another page.            if (line != null)            {                ev.HasMorePages = true;            }            else            {                ev.HasMorePages = false;            }         }

core 是个获取本地属性的类, 包括可以读取可用打印机的名字

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