本文在前面写的博文基础上进行修改：利用Graphics的CopyFromScreen实现简陋版的打印(C#)_zxy2847225301的博客-CSDN博客

通过截图的方式进行打印在前面的文章后面已经介绍过，有问题。

UI布局如下：

代码如下：

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

namespace winformDemo
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            this.printDocument1.PrintPage += new System.Drawing.Printing.PrintPageEventHandler(this.printDocument1_PrintPage);
            this.button1.Click += new System.EventHandler(this.button1_Click);
        }
        private void button1_Click(object sender, EventArgs e)
        {
            printPreviewDialog1.Document = printDocument1;
            printPreviewDialog1.ShowDialog();
        }

        private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
        {
            PrintToGraphics(e.Graphics, e.MarginBounds);
        }
        public void PrintToGraphics(Graphics graphics, Rectangle bounds)
        {
            Bitmap bitmap = new Bitmap(this.Width, this.Height);
            this.DrawToBitmap(bitmap, new Rectangle(0, 0, bitmap.Width, bitmap.Height));
            Rectangle target = new Rectangle(0, 0, bitmap.Width, bitmap.Height);
            graphics.PageUnit = GraphicsUnit.Display;
            graphics.DrawImage(bitmap, target);
           
        }
    }
}

运行结果如下：

把Form1窗体往任务栏方向挪动，不会出现前面博文中说的那个问题，如下图：

 

好了，本水文到此结束。后面还有继续深入研究的，如打印单个控件TextBox,Button，还有实现分页打印等