测试打印功能

// 先创建窗体，后拉入Button控件两个，一个预览功能，一个打印功能，再拉入控件PrintDocument控件、PrintPreviewDilogs控件、pageSetupDilogs控件

// 后台代码

List<string> students = new List<string>() {"张三","李四","王五" };
        int count = 0;//要打印的学员姓名的下标值
        private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
        {
            Graphics g = e.Graphics;
            string name = students[count];
            g.DrawString(name,new Font("宋体",20),Brushes.Black,100,100);
            //g.DrawLine(new Pen(Color.Red),new Point(200,200),new Point(300,200));
            g.Dispose();
            count++;//递增，为了打印下一个姓名
            //判断打印是否结束
            if (count == students.Count)
            {
                e.HasMorePages = false;//不会打印下一页
            }
            else
            {
                e.HasMorePages = true;//继续打印下一页
            }
        }

        //预览按钮
        private void btnPrev_Click(object sender, EventArgs e)
        {
            this.printPreviewDialog1.Document = this.printDocument1;
            this.printPreviewDialog1.ShowDialog();
        }

        // 打印按钮
        private void btnPrint_Click(object sender, EventArgs e)
        {
            this.pageSetupDialog1.Document = this.printDocument1;
            if(this.pageSetupDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK)
            {
                this.printDocument1.Print();//打印
            }
        }