//button點擊事件private void button1_Click(object sender, EventArgs e){  if (string.IsNullOrEmpty(textBox1.Text))  {   MessageBox.Show("請輸入要生成的二維碼！");   return;  }  GenByZXingNet(textBox1.Text);}

//生成二維碼圖片的函數private Bitmap GenByZXingNet(string msg) {  BarcodeWriter writer = new BarcodeWriter();  writer.Format = BarcodeFormat.QR_CODE;  writer.Options.Hints.Add(EncodeHintType.CHARACTER_SET, "UTF-8");//編碼問題  writer.Options.Hints.Add(EncodeHintType.ERROR_CORRECTION, ZXing.QrCode.Internal.ErrorCorrectionLevel.H);  const int codeSizeInPixels = 240; //設置圖片長寬  writer.Options.Height = writer.Options.Width = codeSizeInPixels;  writer.Options.Margin = 1;//設置邊框  ZXing.Common.BitMatrix bm = writer.Encode(msg);  Bitmap img = writer.Write(bm);  pictureBox1.Image = img;  return img; }

//若需要打開exe默認出現一張二維碼，先給textbox初始值，然后添加函數private void Form1_Load(object sender, EventArgs e) {  button1_Click(null,null); }