C# winform 新手例項：點選生成二維碼

效果圖如下：

部分程式碼：

//button點選事件
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式
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;   //設定圖片長寬
        writer.Options
 
.Height = writer.Options.Width = codeSizeInPixels;
        writer.Options.Margin = 1;//設定邊框
        ZXing.Common.BitMatrix bm = writer.Encode(msg);
        Bitmap img = writer.Write(bm);
        pictureBox1.Image = img;
        return img;
    }

//若需要開啟exe默認出現一張二維碼，先給textbox初始值，然後新增函式
private void Form1_Load
 
(object sender, EventArgs e)
    {
        button1_Click(null,null);
    }