佛山做网站设计制作价格,有做电动车修车的网站吗,怎么在虚拟空间做两个网站,龙岩网站报价在.NET中#xff0c;画图主要是通过Graphics类实现的#xff0c;这个类主要通过两类方法完成画图#xff0c;一类是DrawXXX#xff0c;画各种线条图形#xff1b;另一类是FillXXX,用各种形状#xff0c;填充各种图形。Graphics是画板#xff0c;Draw各个方法是各种盏笔画图主要是通过Graphics类实现的这个类主要通过两类方法完成画图一类是DrawXXX画各种线条图形另一类是FillXXX,用各种形状填充各种图形。Graphics是画板Draw各个方法是各种盏笔不过在调用Draw方法时参数需要一个Pen对象)Fill的各个方法就是种种刷子确实Fill的方法参数也需要一个Brush对象。首先要熟悉各个Draw和Fill方法以及他们的参数那么剩下的事就是对坐票了画什么在那里画怎么用Draw和Fill了。下面是在Form上画了一个小票然后调用打印组件在虚拟打印机里打印出来的效果。using QRCoder;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;namespace WinFormsDemo12
{public partial class Form1 : Form{public Form1(){InitializeComponent();}void Draw(Graphics graphics){var y 15;using var logo new Bitmap(Directory.GetCurrentDirectory() /aeon.png);graphics.DrawImage(MakeGrayscale(logo), 60, y, 200, 80);graphics.DrawLine(new Pen(Color.Black, 2), 10, y 80, 310, y);graphics.DrawLine(new Pen(Color.Black, 2), 10, y 4, 310, y);var font new Font(黑体, 10);var brush new SolidBrush(Color.Black);graphics.DrawString(分店012, font, brush, 10, y 1);graphics.DrawString(店员张三, font, brush, 160, y);graphics.DrawString($时间{DateTime.Now.ToString(yyyy-MM-dd HH:mm:ss)}, font, brush, 10, y 20);var no 000000000001;graphics.DrawString($流水号{no}, font, brush, 10, y 20);graphics.DrawLine(new Pen(Color.Black, 2), 10, y 25, 310, y);graphics.DrawString(名称 数量 单价 金额, font, brush, 10, y 5);graphics.DrawString(西红柿 500g 26.00 15.00, font, brush, 10, y 20);graphics.DrawString(西葫芦 1000g 23.00 23.00, font, brush, 10, y 20);graphics.DrawString(茄子 500g 50.00 25.00, font, brush, 10, y 20);graphics.DrawString(豆角 500g 38.00 19.00, font, brush, 10, y 20);graphics.DrawLine(new Pen(Color.Black, 2), 10, y 20, 310, y);graphics.DrawLine(new Pen(Color.Black, 2), 10, y 4, 310, y);var sumfont new Font(黑体, 12);graphics.DrawString( 小计82, sumfont, brush, 10, y 5);var qrCodeAsBitmapByteArr PngByteQRCodeHelper.GetQRCode(no, QRCodeGenerator.ECCLevel.Q, 20, false);using var qrcode Image.FromStream(new MemoryStream(qrCodeAsBitmapByteArr));graphics.DrawImage(qrcode, 100, y 50, 120, 120);}public static Bitmap MakeGrayscale(Bitmap original){var newBitmap new Bitmap(original.Width, original.Height);var g Graphics.FromImage(newBitmap);var colorMatrix new System.Drawing.Imaging.ColorMatrix(new float[][]{new float[] {.3f, .3f, .3f, 0, 0},new float[] {.59f, .59f, .59f, 0, 0},new float[] {.11f, .11f, .11f, 0, 0},new float[] {0, 0, 0, 1, 0},new float[] {0, 0, 0, 0, 1}});var attributes new System.Drawing.Imaging.ImageAttributes();attributes.SetColorMatrix(colorMatrix);g.DrawImage(original, new Rectangle(0, 0, original.Width, original.Height), 0, 0, original.Width, original.Height, GraphicsUnit.Pixel, attributes);g.Dispose();return newBitmap;} private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e){if (e.Graphics ! null){Draw(e.Graphics);}}private void button2_Click(object sender, EventArgs e){printDocument1.Print();}private void button1_Click(object sender, EventArgs e){var graphics this.CreateGraphics();Draw(graphics);}}
}MakeGrayscale方法是把彩色logo转黑白的一个算法关注画图部分请忽略。Graphics实现了IDisposable用后请释放。窗体的浏览效果虚拟打印机输出的PDF效果图
