二维码生成和下载实例

设置指定信息生成二维码和下载实例

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using MessagingToolkit.QRCode.Codec;
using System.Drawing.Drawing2D;

namespace Test
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();
            qrCodeEncoder.QRCodeBackgroundColor = Color.Transparent;
            //qrCodeEncoder.QRCodeForegroundColor = Color.Orange;
            //qrCodeEncoder.CharacterSet = CharacterSets[cboCharacterSet.Text];
            qrCodeEncoder.QRCodeScale = int.Parse(textBox2.Text);
            Bitmap image = qrCodeEncoder.Encode(textBox1.Text);
            pictureBox1.Image = CombinImage(image,System.IO.Directory.GetCurrentDirectory()+ "\\logo.png", textBox3.Text);


            pictureBox1.Height = pictureBox1.Image.Height;
            pictureBox1.Width = pictureBox1.Image.Width;

            image.Save("./" + textBox3.Text + ".png");
        }

        /// <summary>  
        /// 调用此函数后使此两种图片合并，类似相册，有个  
        /// 背景图，中间贴自己的目标图片  
        /// </summary>  
        /// <param name="imgBack">粘贴的源图片</param>  
        /// <param name="destImg">Logo图片</param>  
        public static Image CombinImage(Image imageCode, string logoImagePath, string words)
        {
            Image imageLogo = Image.FromFile(logoImagePath);        //照片图片    
            if (imageLogo.Height != 65 || imageLogo.Width != 65)
            {
                imageLogo = KiResizeImage(imageLogo, 65, 65, 0);
            }
            Graphics g = Graphics.FromImage(imageCode);

            g.DrawImage(imageCode, 0, 0, imageCode.Width, imageCode.Height);

            //g.FillRectangle(System.Drawing.Brushes.White, imgBack.Width / 2 - img.Width / 2 - 1, imgBack.Width / 2 - img.Width / 2 - 1,1,1);//相片四周刷一层黑色边框  
            //g.DrawImage(img, 照片与相框的左边距, 照片与相框的上边距, 照片宽, 照片高);  

            int x = imageCode.Width / 2 - imageLogo.Width / 2;
            int y = imageCode.Width / 2 - imageLogo.Width / 2;

            g.DrawImage(imageLogo, x, y, imageLogo.Width, imageLogo.Height);

            //添加文字
            Font font = new System.Drawing.Font("微软雅黑", 30F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(134)));

            x = x - (int)(font.Size * words.Length) / 4;

            g.DrawString(words, font, Brushes.Orange, new Point(x, y + imageLogo.Height));

            g.Dispose();

            return imageCode;
        }


        /// <summary>  
        /// Resize图片  
        /// </summary>  
        /// <param name="bmp">原始Bitmap</param>  
        /// <param name="newW">新的宽度</param>  
        /// <param name="newH">新的高度</param>  
        /// <param name="Mode">保留着，暂时未用</param>  
        /// <returns>处理以后的图片</returns>  
        public static Image KiResizeImage(Image bmp, int newW, int newH, int Mode)
        {
            try
            {
                Image b = new Bitmap(newW, newH);
                Graphics g = Graphics.FromImage(b);
                // 插值算法的质量  
                g.InterpolationMode = InterpolationMode.HighQualityBicubic;
                g.DrawImage(bmp, new Rectangle(0, 0, newW, newH), new Rectangle(0, 0, bmp.Width, bmp.Height), GraphicsUnit.Pixel);
                g.Dispose();
                return b;
            }
            catch
            {
                return null;
            }
        }
    }
}

http://download.csdn.net/detail/fuyifang/7792287