using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using System.Drawing.Printing;
using System.Windows.Forms;
using System.IO;
namespace MyCCTV
{
sealed class TextFilePrinter
{
string fileName;
Encoding theEncode;
Font theFont;
StreamReader srToPrint;
int currPage;
public TextFilePrinter(string fileName)
: this(fileName, Encoding.GetEncoding(936), new Font("MS UI Gothic", 9))
{
}
public TextFilePrinter(string fileName, Encoding theEncode, Font theFont)
{
this.fileName = fileName;
this.theEncode = theEncode;
this.theFont = theFont;
}
public void Print()
{
using (srToPrint = new StreamReader(fileName, theEncode))
{
PrintDialog dlg = new PrintDialog();
dlg.Document = GetPrintDocument();
dlg.AllowSomePages = true;
dlg.AllowPrintToFile = false;
if (dlg.ShowDialog() == DialogResult.OK) dlg.Document.Print();
}
}
public void View()
{
using (srToPrint = new StreamReader(fileName, theEncode))
{
PrintPreviewDialog dlg = new PrintPreviewDialog();
dlg.Document = GetPrintDocument();
dlg.ShowDialog();
}
}
PrintDocument GetPrintDocument()
{
currPage = 1;
PrintDocument doc = new PrintDocument();
doc.DocumentName = fileName;
doc.PrintPage += new PrintPageEventHandler(PrintPageEvent);
return doc;
}
void PrintPageEvent(object sender, PrintPageEventArgs ev)
{
string line = null;
float linesPerPage = ev.MarginBounds.Height / theFont.GetHeight(ev.Graphics);
bool isSomePages = ev.PageSettings.PrinterSettings.PrintRange == PrintRange.SomePages;
if (isSomePages)
{
while (currPage < ev.PageSettings.PrinterSettings.FromPage)
{
for (int count = 0; count < linesPerPage; count++)
{
line = srToPrint.ReadLine();
if (line == null) break;
}
if (line == null) return;
currPage++;
}
if (currPage > ev.PageSettings.PrinterSettings.ToPage) return;
}
for (int count = 0; count < linesPerPage; count++)
{
line = srToPrint.ReadLine();
if (line == null) break;
ev.Graphics.DrawString(line, theFont, Brushes.Black, ev.MarginBounds.Left,
ev.MarginBounds.Top + (count * theFont.GetHeight(ev.Graphics)), new StringFormat());
}
currPage++;
if (isSomePages && currPage > ev.PageSettings.PrinterSettings.ToPage) return;
if (line != null) ev.HasMorePages = true;
}
}
}