这是一个C#打印文本文件的实现类库，这个程序的功能包括：C#打印文本文件预览、C#打印文本文件。C#文本文件的打印时可以选择打印机，可以指定文本文件打印的页码范围。调用方法非常简单，让我们开始吧：
TextFilePrinter p = new TextFilePrinter(tbxFileName.Text);
p.View();// 打印预览
p.Print(); // 打印文件
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使用 TextFilePrinter 类的以下构造函数可以指定打印时使用的字体：
TextFilePrinter(string fileName,
Encoding theEncode, Font theFont)
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下面测试C#打印文本文件实现程序运行时的截图:
点击“预览”按钮后：
点击“打印”按钮后：
这幅图中的打印机：“Microsoft Office Doument Image Writer”是 Microsoft Office 2003 软件提供一个虚拟打印机，用来调试打印程序非常方便(使用“打印预览”也可以调试打印程序，但“打印预览”只能使用默认的打印机和默认的打印属性，也不能设置页码范围)，可以设置打印属性和页码范围以及打印份数。使用它来调试打印程序，可以节省不少打印纸。为建设节约型社会作贡献 :)
这幅图就是该虚拟打印机在屏幕上的显示的结果。
这里是测试C#打印文本文件程序的源代码：
// PrintFile.cs - 文件打印程序
// 编译方法: csc /t:winexe PrintFile.cs TextFilePrinter.cs
using System;
using System.Drawing;
using System.Windows.Forms;
using Skyiv.Util;
namespace Skyiv.Ben.Test
{
class PrintFileForm : Form
{
TextBox tbxFileName;
public PrintFileForm()
{
SuspendLayout();
Button btnFileName = new Button();
btnFileName.Text = "文件名";
btnFileName.Location = new Point(10, 10);
btnFileName.Size = new Size(60, 24);
btnFileName.Click += new EventHandler(BtnFileName_Click);
Button btnPrint = new Button();
btnPrint.Text = "打印";
btnPrint.Location = new Point(75, 10);
btnPrint.Size = new Size(60, 24);
btnPrint.Click += new EventHandler(BtnPrint_Click);
Button btnView = new Button();
btnView.Text = "预览";
btnView.Location = new Point(140, 10);
btnView.Size = new Size(60, 24);
btnView.Click += new EventHandler(BtnView_Click);
tbxFileName = new TextBox();
tbxFileName.Text = "PrintFile.cs";
tbxFileName.Location = new Point(10, 44);
tbxFileName.Size = new Size(190, 20);
tbxFileName.ReadOnly = true;
tbxFileName.Anchor = (
AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right);
Controls.AddRange(new Control[]{
btnFileName, btnPrint, btnView, tbxFileName});
Text = "文本文件打印程序";
ClientSize = new Size(210, 80);
ResumeLayout(false);
}
void BtnFileName_Click(object sender, EventArgs e)
{
OpenFileDialog dlg = new OpenFileDialog();
if(dlg.ShowDialog() != DialogResult.OK) return;
tbxFileName.Text = dlg.FileName;
}
void BtnPrint_Click(object sender, EventArgs e)
{
TextFilePrinter p = new TextFilePrinter(tbxFileName.Text);
p.Print();
}
void BtnView_Click(object sender, EventArgs e)
{
TextFilePrinter p = new TextFilePrinter(tbxFileName.Text);
p.View();
}
static void Main()
{
Application.Run(new PrintFileForm());
}
}
}
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这里是C#打印文本文件实现类的源代码:
using System;
using System.Drawing;
using System.Drawing.Printing;
using System.Windows.Forms;
using System.IO;
using System.Text;
namespace Skyiv.Util
{
sealed class TextFilePrinter
{
string fileName;
Encoding theEncode;
Font theFont;
StreamReader srToPrint;
int currPage;
public TextFilePrinter(string fileName)
: this(fileName,
Encoding.GetEncoding("GB18030"), new Font("新宋体", 10))
{
}
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;
}
}
}
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这些程序都相当简当明了，这里就不再解释了。
这个类库有个缺点：当C#文本文件中的一行不能在打印纸的一行中打印完时，该行的后半部就丢失了。
C#打印文本文件的具体内容就向你介绍到这里，希望对你了解和学习C#打印文本文件有所帮助。
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