C# winform点击生成二维码实例代码

//button点击事件private void button1_Click(object sender, EventArgs e){  if (string.IsNullOrEmpty(textBox1.Text))  {   MessageBox.Show("请输入要生成的二维码！");   return;  }  GenByZXingNet(textBox1.Text);}

//生成二维码图片的函数private Bitmap GenByZXingNet(string msg) {  BarcodeWriter writer = new BarcodeWriter();  writer.Format = BarcodeFormat.QR_CODE;  writer.Options.Hints.Add(EncodeHintType.CHARACTER_SET, "UTF-8");//编码问题  writer.Options.Hints.Add(EncodeHintType.ERROR_CORRECTION, ZXing.QrCode.Internal.ErrorCorrectionLevel.H);  const int codeSizeInPixels = 240; //设置图片长宽  writer.Options.Height = writer.Options.Width = codeSizeInPixels;  writer.Options.Margin = 1;//设置边框  ZXing.Common.BitMatrix bm = writer.Encode(msg);  Bitmap img = writer.Write(bm);  pictureBox1.Image = img;  return img; }

//若需要打开exe默认出现一张二维码，先给textbox初始值，然后添加函数private void Form1_Load(object sender, EventArgs e) {  button1_Click(null,null); }