C#直接打印文件

【实例截图】

【核心代码】

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
//Download by http://www.codesc.net
namespace PrintText
{
	/// <summary>
	/// Form1 的摘要说明。
	/// </summary>
	public class Form1 : System.Windows.Forms.Form
	{
		private System.Windows.Forms.Label label1;
		private System.Windows.Forms.RichTextBox richTextBox1;
		private System.Windows.Forms.Button button1;
		private System.Windows.Forms.Button button2;
		private System.Windows.Forms.OpenFileDialog openFileDialog1;
		private System.Drawing.Printing.PrintDocument printDocument1;
		//记录打印行数
		private int i=0;
        private PrintPreviewControl printPreviewControl1;
        private Button button3;
        private PrintPreviewDialog printPreviewDialog1;
        private Label label2;
        private Button buttonPreviewControl;
		/// <summary>
		/// 必需的设计器变量。
		/// </summary>
		private System.ComponentModel.Container components = null;

		public Form1()
		{
			//
			// Windows 窗体设计器支持所必需的
			//
			InitializeComponent();

			//
			// TODO: 在 InitializeComponent 调用后添加任何构造函数代码
			//
		}

		/// <summary>
		/// 清理所有正在使用的资源。
		/// </summary>
		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows 窗体设计器生成的代码
		/// <summary>
		/// 设计器支持所需的方法 - 不要使用代码编辑器修改
		/// 此方法的内容。
		/// </summary>
		private void InitializeComponent()
		{
            System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(Form1));
            this.richTextBox1 = new System.Windows.Forms.RichTextBox();
            this.button1 = new System.Windows.Forms.Button();
            this.button2 = new System.Windows.Forms.Button();
            this.openFileDialog1 = new System.Windows.Forms.OpenFileDialog();
            this.printDocument1 = new System.Drawing.Printing.PrintDocument();
            this.printPreviewControl1 = new System.Windows.Forms.PrintPreviewControl();
            this.button3 = new System.Windows.Forms.Button();
            this.printPreviewDialog1 = new System.Windows.Forms.PrintPreviewDialog();
            this.label2 = new System.Windows.Forms.Label();
            this.buttonPreviewControl = new System.Windows.Forms.Button();
            this.SuspendLayout();
            // 
            // richTextBox1
            // 
            this.richTextBox1.Location = new System.Drawing.Point(8, 30);
            this.richTextBox1.Name = "richTextBox1";
            this.richTextBox1.Size = new System.Drawing.Size(312, 144);
            this.richTextBox1.TabIndex = 1;
            this.richTextBox1.Text = "";
            // 
            // button1
            // 
            this.button1.Location = new System.Drawing.Point(8, 178);
            this.button1.Name = "button1";
            this.button1.Size = new System.Drawing.Size(88, 23);
            this.button1.TabIndex = 2;
            this.button1.Text = "浏览文件";
            this.button1.Click  = new System.EventHandler(this.button1_Click);
            // 
            // button2
            // 
            this.button2.Location = new System.Drawing.Point(118, 178);
            this.button2.Name = "button2";
            this.button2.Size = new System.Drawing.Size(88, 23);
            this.button2.TabIndex = 3;
            this.button2.Text = "打印文件";
            this.button2.Click  = new System.EventHandler(this.button2_Click);
            // 
            // openFileDialog1
            // 
            this.openFileDialog1.Filter = "所有文本文件(*.txt)|*.txt|所有文件(*.*)|*.*";
            // 
            // printDocument1
            // 
            this.printDocument1.PrintPage  = new System.Drawing.Printing.PrintPageEventHandler(this.printDocument1_PrintPage);
            // 
            // printPreviewControl1
            // 
            this.printPreviewControl1.AutoZoom = false;
            this.printPreviewControl1.Dock = System.Windows.Forms.DockStyle.Bottom;
            this.printPreviewControl1.Location = new System.Drawing.Point(0, 210);
            this.printPreviewControl1.Name = "printPreviewControl1";
            this.printPreviewControl1.Size = new System.Drawing.Size(770, 254);
            this.printPreviewControl1.TabIndex = 4;
            this.printPreviewControl1.Zoom = 1D;
            // 
            // button3
            // 
            this.button3.Location = new System.Drawing.Point(234, 176);
            this.button3.Name = "button3";
            this.button3.Size = new System.Drawing.Size(86, 26);
            this.button3.TabIndex = 5;
            this.button3.Text = "打印预览";
            this.button3.UseVisualStyleBackColor = true;
            this.button3.Click  = new System.EventHandler(this.button3_Click);
            // 
            // printPreviewDialog1
            // 
            this.printPreviewDialog1.AutoScrollMargin = new System.Drawing.Size(0, 0);
            this.printPreviewDialog1.AutoScrollMinSize = new System.Drawing.Size(0, 0);
            this.printPreviewDialog1.ClientSize = new System.Drawing.Size(400, 300);
            this.printPreviewDialog1.Document = this.printDocument1;
            this.printPreviewDialog1.Enabled = true;
            this.printPreviewDialog1.Icon = ((System.Drawing.Icon)(resources.GetObject("printPreviewDialog1.Icon")));
            this.printPreviewDialog1.Name = "printPreviewDialog1";
            this.printPreviewDialog1.Visible = false;
            // 
            // label2
            // 
            this.label2.AutoSize = true;
            this.label2.Location = new System.Drawing.Point(12, 9);
            this.label2.Name = "label2";
            this.label2.Size = new System.Drawing.Size(41, 12);
            this.label2.TabIndex = 6;
            this.label2.Text = "label2";
            // 
            // buttonPreviewControl
            // 
            this.buttonPreviewControl.Location = new System.Drawing.Point(343, 178);
            this.buttonPreviewControl.Name = "buttonPreviewControl";
            this.buttonPreviewControl.Size = new System.Drawing.Size(127, 26);
            this.buttonPreviewControl.TabIndex = 7;
            this.buttonPreviewControl.Text = "打印预览控件显示";
            this.buttonPreviewControl.UseVisualStyleBackColor = true;
            this.buttonPreviewControl.Click  = new System.EventHandler(this.buttonPreviewControl_Click);
            // 
            // Form1
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(6, 14);
            this.ClientSize = new System.Drawing.Size(770, 464);
            this.Controls.Add(this.buttonPreviewControl);
            this.Controls.Add(this.label2);
            this.Controls.Add(this.button3);
            this.Controls.Add(this.printPreviewControl1);
            this.Controls.Add(this.button2);
            this.Controls.Add(this.button1);
            this.Controls.Add(this.richTextBox1);
            this.Name = "Form1";
            this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen;
            this.Text = "演示直接打印文件";
            this.ResumeLayout(false);
            this.PerformLayout();

		}
		#endregion

		/// <summary>
		/// 应用程序的主入口点。
		/// </summary>
		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}

		private void button1_Click(object sender, System.EventArgs e)
		{//浏览文件内容
			if(this.openFileDialog1.ShowDialog()==DialogResult.OK)
			{
				string MyFileName=this.openFileDialog1.FileName;
				string MyShortFileName=MyFileName.Substring(MyFileName.LastIndexOf("\\") 1);
				this.label2.Text=MyShortFileName "的内容如下：";
				this.richTextBox1.LoadFile(MyFileName,RichTextBoxStreamType.PlainText);
			}
		}

		private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
		{
            //打印信息处理	
            Graphics g = e.Graphics;  //获得绘图对象
			//一页中的行数
			float LinePages = 0 ;
			//待绘文本的纵向坐标
			float YPos =  0 ;
			//行计数
			int count = 0 ;
			//左边界
			float LeftMargin = e.MarginBounds.Left;
			//顶边界
			float topMargin = e.MarginBounds.Top;
			//字符串流
			String line=null;		
			//根据页面的高度和字体的高度计算
			//一页中可以打印的行数
			LinePages = e.MarginBounds.Height  / this.Font.GetHeight(g) ;   
			if(i>=this.richTextBox1.Lines.Length-1)
			{
				e.HasMorePages = false ;
				return;
			}
			//每次从文件中读取一行并打印		
			while (count < LinePages && ((line=this.richTextBox1.Lines[i  ]) != null)) 
			{	
				//计算这一行的显示位置
				YPos = topMargin   (count * this.Font.GetHeight(g));
				//绘制文本
				g.DrawString (line, this.Font, Brushes.Black, LeftMargin, YPos, new StringFormat());
                Console.WriteLine(LeftMargin);
				//行数增加
				count  ;
				if(i>this.richTextBox1.Lines.Length-1)
					break;
			}
			//如果有多行，则另外打印一页
            //if (line != null)
            //    e.hasmorepages = true ;
            //else
            //    e.hasmorepages = false ;
		}

		private void button2_Click(object sender, System.EventArgs e)
		{//打印文件
			if(this.richTextBox1.Text.Length<1)
				return;
			i=0;
			try 
			{
            
			  this.printDocument1.Print();
			} 	
			catch(Exception error) 
		    {//打印出错处理
			  MessageBox.Show("打印文件发生错误：   "   error.Message,"",MessageBoxButtons.OK,MessageBoxIcon.Information);
			}
		}

        private void button3_Click(object sender, EventArgs e)
        {
            printPreviewDialog1.Document = printDocument1;

            //显示打印预览
            DialogResult result = printPreviewDialog1.ShowDialog();
        }

        private void buttonPreviewControl_Click(object sender, EventArgs e)
        {
            printPreviewControl1.Document = printDocument1;
            this.printPreviewControl1.InvalidatePreview();
            //printDocument1.
        }
	}
}