代码如下:

	

	private void button1_Click(object sender, EventArgs e)

	        {

	            if (string.IsNullOrEmpty(this.textBox1.Text.Trim()))

	            {

	                MessageBox.Show("请输入需要转换的信息！");

	                return;

	            }
	

		 
	

		            string content = textBox1.Text;
	

		            Hashtable hints= new Hashtable();  

		            hints.Add(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.L);//纠错级别

		            hints.Add(EncodeHintType.CHARACTER_SET, "UTF-8");//编码格式
	

		            ByteMatrix byteMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, 300, 300, hints);

		            Bitmap bitmap = toBitmap(byteMatrix);

		            pictureBox1.Image = bitmap;

		

		            SaveFileDialog sFD = new SaveFileDialog();

		            sFD.Filter = "*.png|*.png";

		            sFD.AddExtension = true;

		            try

		            {

		                if (sFD.ShowDialog() == DialogResult.OK)

		                {

		                    writeToFile(byteMatrix, System.Drawing.Imaging.ImageFormat.Png, sFD.FileName);

		                }

		            }

		            catch (Exception ex)

		            {

		                MessageBox.Show(ex.Message);

		            }
	

		        }
	

		

		        public static void writeToFile(ByteMatrix matrix, System.Drawing.Imaging.ImageFormat format, string file)

		        {

		            System.Drawing.Imaging.EncoderParameters eps = new System.Drawing.Imaging.EncoderParameters();

		            eps.Param[0] = new System.Drawing.Imaging.EncoderParameter(System.Drawing.Imaging.Encoder.Quality, 100L);

		            Bitmap bmap = toBitmap(matrix);

		            bmap.Save(file, format);

		        }

		        public static Bitmap toBitmap(ByteMatrix matrix)

		        {

		            int width = matrix.Width;

		            int height = matrix.Height;

		            Bitmap bmap = new Bitmap(width, height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);

		            for (int x = 0; x < width; x++)

		            {

		                for (int y = 0; y < height; y++)

		                {

		                    bmap.SetPixel(x, y, matrix.get_Renamed(x, y) != -1 ? ColorTranslator.FromHtml("Purple") : ColorTranslator.FromHtml("0xFFFFFFFF"));//可以自定义颜色和背景色

		                }

		            }
	

		            return bmap;    

		        }