printservice.cs

1）C++源代码扫描程序识别C++记号。 C++语言包含了几种类型的记号：标识符

using System;
using System.Collections.Generic;
using System.Linq;
using System.Drawing;
using System.Drawing.Printing;
using System.Text;
using System.IO;
using System.Windows.Forms;

namespace Scanner
{
    public class PrintService
    {
        private Stream streamToPrint;
        string streamType;
        private PrintDocument docToPrint =new PrintDocument();

        public PrintService()
        {
            this.docToPrint.PrintPage += new PrintPageEventHandler(docToPrint_PrintPage);
        }

        public void StartPrint(Stream streamToPrint, string streamType)
        {
            this.streamToPrint = streamToPrint;
            this.streamType = streamType;
            System.Windows.Forms.PrintDialog PrintDialog1 = new PrintDialog();
            PrintDialog1.AllowSomePages = true;
            PrintDialog1.ShowHelp = true;
            PrintDialog1.Document = docToPrint;
            DialogResult result = PrintDialog1.ShowDialog();
            if (result == DialogResult.OK)
            {
                docToPrint.Print();
            }
        }

        private void docToPrint_PrintPage(object sender,PrintPageEventArgs e)
        {
            switch (this.streamType)
            {
                case "txt":
                    string text = null;
                    Font printFont = new Font("Arial", 35, System.Drawing.FontStyle.Regular);
                    StreamReader streamReader = new StreamReader(this.streamToPrint);
                    text = streamReader.ReadToEnd();
                    e.Graphics.DrawString(text, printFont, System.Drawing.Brushes.Black, e.MarginBounds.X, e.MarginBounds.Y);
                    break;
                case "image":
                    Image image = Image.FromStream(this.streamToPrint);
                    int x = e.MarginBounds.X;
                    int y = e.MarginBounds.Y;
                    int width = image.Width;
                    int height = image.Height;
                    if ((width / e.MarginBounds.Width) > (height / e.MarginBounds.Height))
                    {
                        width = e.MarginBounds.Width;
                        height = image.Height * e.MarginBounds.Width / image.Width;
                    }
                    else
                    {
                        height = e.MarginBounds.Height;
                        width = image.Width * e.MarginBounds.Height / image.Height;
                    }
                    System.Drawing.Rectangle destRect = new System.Drawing.Rectangle(x, y, width, height);
                    e.Graphics.DrawImage(image, destRect, 0, 0, image.Width, image.Height, System.Drawing.GraphicsUnit.Pixel);
                    break;
                default:
                    break;
            }

        }

    }
}