C#实现打印功能

实际开发过程中经常会遇到打印某种报表的情况，用C#实现打印报表的功能。第一，如果报表的大小合适，或者纸张的大小足够放得下报表，则可以选择直接截屏，打印截屏所得的图片；第二，如果报表和纸张的大小不匹配，则可能需要在程序中根据一定格式拼出合适大小的报表。

截屏实现打印报表

        private void button3_Click(object sender, EventArgs e)
        {

            // 截屏
            
            Form form = this;
            if (form != null)
            {
                Graphics mygraphics = form.CreateGraphics();
                memoryImage = new Bitmap(form.Width, form.Height, mygraphics);
                Graphics memoryGraphics = Graphics.FromImage(memoryImage);
                memoryGraphics.CopyFromScreen(form.Location.X, form.Location.Y, 0, 0, form.Size);
            }
            
            // 设置打印文档名（如果使用Adobe PDF或者Microsoft Office Document Image Writer打印，则作为默认输出文件名）
            this.printDocument1.DocumentName = this.label27.Text;

            this.printDocument1.Print();
        }
        
        // printDocument1的PrintPage事件
        private void printDocument1_PrintPage(object sender, PrintPageEventArgs e)
        {
            e.Graphics.Clear(Color.White);
            e.Graphics.DrawImage(memoryImage, 0, 0);
        }

        //定义一个图片
        private Bitmap memoryImage = null;

其中button3即为打印按钮，打印按钮的监听事件配置请自行完成（可直接在VS的button3的“属性”页中设置）。printDocument1为PrintDocument空间，请自行添加；其PrintPage事件的监听配置请自行完成。

拼凑特定格式的报表打印

        private void button3_Click(object sender, EventArgs e)
        {
            this.printDocument1.DocumentName = this.label27.Text;

            this.printDocument1.Print();
        }

        private void printDocument1_PrintPage(object sender, PrintPageEventArgs e)
        {
            e.Graphics.Clear(Color.White);
            // 开始绘制文档
            // 默认为横排文字
            e.Graphics.DrawString("标题",
                  new Font(new FontFamily("宋体"), 22, FontStyle.Bold),
                  System.Drawing.Brushes.Black,
                  170, 10);
            e.Graphics.DrawString("性别：" + this.comboBox1.Text,
                                    new Font(new FontFamily("宋体"), 14, FontStyle.Bold),
                                    System.Drawing.Brushes.Black,
                                    20, 50);
            e.Graphics.DrawString("联系电话：" + this.textBox9.Text,
                                    new Font(new FontFamily("宋体"), 14, FontStyle.Bold),
                                    System.Drawing.Brushes.Black,
                                    350, 50);
            e.Graphics.DrawString("地址：" + this.textBox11.Text,
                                    new Font(new FontFamily("宋体"), 14, FontStyle.Bold),
                                    System.Drawing.Brushes.Black,
                                    20, 80);
            // 横线
            e.Graphics.DrawLine(Pens.Black, 20, 110, 800, 110);
            // 竖排文字
            e.Graphics.DrawString("内容",
                                    new Font(new FontFamily("宋体"), 14, FontStyle.Bold),
                                    System.Drawing.Brushes.Black,
                                    20, 120, 
                                    new StringFormat(StringFormatFlags.DirectionVertical));
        }