C#生成二維碼(含解碼)
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 System.Collections;
using com.google.zxing;//需要從網上下載
using System.Text.RegularExpressions;
using ByteMatrix = com.google.zxing.common.ByteMatrix;
namespace 二維碼
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
//生成條形碼
private void button1_Click(object sender, EventArgs e)
{
Regex rg = new Regex("^[0-9]{13}$");
if (!rg.IsMatch(textBox1.Text))
{
MessageBox.Show("本例子采用EAN_13編碼,需要輸入13位數字");
return;
}
try
{
MultiFormatWriter mutiWriter = new com.google.zxing.MultiFormatWriter();
ByteMatrix bm = mutiWriter.encode(textBox1.Text, com.google.zxing.BarcodeFormat.EAN_13, 363, 150);
Bitmap img = bm.ToBitmap();
pictureBox1.Image = img;
//自動保存圖片到當前目錄
string filename = System.Environment.CurrentDirectory + "\\EAN_13" + DateTime.Now.Ticks.ToString() + ".jpg";
img.Save(filename, System.Drawing.Imaging.ImageFormat.Jpeg);
label2.Text = "圖片已保存到:" + filename;
}
catch (Exception ee)
{
MessageBox.Show(ee.Message);
}
}
//生成二維碼
private void button2_Click(object sender, EventArgs e)
{
try
{
MultiFormatWriter mutiWriter = new com.google.zxing.MultiFormatWriter();
ByteMatrix bm = mutiWriter.encode(textBox1.Text, com.google.zxing.BarcodeFormat.QR_CODE, 300, 300);
Bitmap img = bm.ToBitmap();
pictureBox1.Image = img;
string filename = System.Environment.CurrentDirectory + "\\QR" + DateTime.Now.Ticks.ToString() + ".jpg";
img.Save(filename, System.Drawing.Imaging.ImageFormat.Jpeg);
label2.Text = "圖片已保存到:" + filename;
}
catch (Exception ee)
{
MessageBox.Show(ee.Message);
}
}
//生成帶圖片的二維碼
private void button3_Click(object sender, EventArgs e)
{
try
{
MultiFormatWriter mutiWriter = new com.google.zxing.MultiFormatWriter();
Hashtable hint = new Hashtable();
hint.Add(EncodeHintType.CHARACTER_SET, "UTF-8");
hint.Add(EncodeHintType.ERROR_CORRECTION, com.google.zxing.qrcode.decoder.ErrorCorrectionLevel.H);
ByteMatrix bm = mutiWriter.encode(textBox1.Text, com.google.zxing.BarcodeFormat.QR_CODE, 300, 300, hint);
Bitmap img = bm.ToBitmap();
Image middlImg = QRMiddleImg.Image;
System.Drawing.Size realSize = mutiWriter.GetEncodeSize(textBox1.Text, com.google.zxing.BarcodeFormat.QR_CODE, 300, 300);
//計算插入圖片的大小和位置
int middleImgW = Math.Min((int)(realSize.Width / 3.5), middlImg.Width);
int middleImgH = Math.Min((int)(realSize.Height / 3.5), middlImg.Height);
int middleImgL = (img.Width - middleImgW) / 2;
int middleImgT = (img.Height - middleImgH) / 2;
//將img轉換成bmp格式,否則後面無法創建 Graphics對象
Bitmap bmpimg = new Bitmap(img.Width, img.Height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
using (Graphics g = Graphics.FromImage(bmpimg))
{
g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
g.DrawImage(img, 0, 0);
}
//在二維碼中插入圖片
System.Drawing.Graphics MyGraphic = System.Drawing.Graphics.FromImage(bmpimg);
//白底
MyGraphic.FillRectangle(Brushes.White, middleImgL, middleImgT, middleImgW, middleImgH);
MyGraphic.DrawImage(middlImg, middleImgL, middleImgT, middleImgW, middleImgH);
pictureBox1.Image = bmpimg;
//自動保存圖片到當前目錄
string filename = System.Environment.CurrentDirectory + "\\QR" + DateTime.Now.Ticks.ToString() + ".jpg";
bmpimg.Save(filename, System.Drawing.Imaging.ImageFormat.Jpeg);
label2.Text = "圖片已保存到:" + filename;
}
catch (Exception ee)
{
MessageBox.Show(ee.Message);
}
}
string opFilePath = "";
//選擇要生成的中間圖片
private void pictureBox2_Click(object sender, EventArgs e)
{
openFileDialog1.Filter = "圖片文件|*.bmp;*.jpg;*.png;*.ico";
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
opFilePath = openFileDialog1.FileName;
Image img = Image.FromFile(opFilePath);
QRMiddleImg.Image = img;
}
}
//選擇要解碼的圖片
private void button4_Click(object sender, EventArgs e)
{
openFileDialog1.Filter = "圖片文件|*.bmp;*.jpg;*.png;*.ico";
if (openFileDialog1.ShowDialog() == DialogResult.OK)
{
opFilePath = openFileDialog1.FileName;
pictureBox2.ImageLocation = opFilePath;
}
}
//解碼二維碼
private void button5_Click(object sender, EventArgs e)
{
MultiFormatReader mutiReader = new com.google.zxing.MultiFormatReader();
Bitmap img = (Bitmap)Bitmap.FromFile(opFilePath);
if (img == null)
return;
LuminanceSource ls = new RGBLuminanceSource(img, img.Width, img.Height);
BinaryBitmap bb = new BinaryBitmap(new com.google.zxing.common.HybridBinarizer(ls));
//注意 必須是Utf-8編碼
Hashtable hints = new Hashtable();
hints.Add(EncodeHintType.CHARACTER_SET, "UTF-8");
Result r = mutiReader.decode(bb, hints);
richTextBox1.Text = r.Text;
}
}
}