C# 使用打印

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace PrintdDocument
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void pageSetupToolStripMenuItem1_Click(object sender, EventArgs e)
{
printDialog1.ShowDialog();
}

private void PagePreviewToolStripMenuItem_Click(object sender, EventArgs e)
{
try
{
printPreviewDialog1.ShowDialog();
}
catch(Exception ex)
{
MessageBox.Show(ex.Message,"打印出错",MessageBoxButtons.OK,MessageBoxIcon.Error);
}
}

private void printToolStripMenuItem_Click(object sender, EventArgs e)
{
try
{
printDocument1.Print();
}
catch(Exception ex)
{
MessageBox.Show(ex.Message,"打印出错",MessageBoxButtons.OK,MessageBoxIcon.Error);
}
}

private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
{
Graphics g = e.Graphics;//获得绘图对象
float linesPerPage = 0;//页面行号
float yPosition = 0;//绘制字符串的纵向位置
int count = 0;//行计数器
float leftMargin = e.MarginBounds.Left;//左边距
float topMargin = e.MarginBounds.Top;//上边距
string line = null;//行字符串
StringReader lineReader = new StringReader(richTextBox1.Text);
Font printFont = this.richTextBox1.Font;//当前的打印字体
SolidBrush myBrush = new SolidBrush(Color.Black);//刷子
linesPerPage = e.MarginBounds.Height / printFont.GetHeight(g);//每页可打印行数
//逐行的循环打印一页
while(count<linesPerPage&&((line=lineReader.ReadLine())!=null))
{
yPosition=topMargin+(count*printFont.GetHeight(g));
g.DrawString(line,printFont,myBrush,leftMargin,yPosition,new StringFormat());
count++;
}
if(line!=null)
e.HasMorePages=true;
else
e.HasMorePages=false;

}
}

}