//读取 private void showMess()        {            this.dataGridViewX2.Rows.Clear();            //将车辆信息一行行添加到datagreatview  里面            StreamReader sr = File.OpenText("C:\\Users\\Administrator\\Desktop\\CarMessages.txt");            string line;            int i = 0;            List
     
       list = new List
      
       ();            while ((line = sr.ReadLine()) != null)            {                list.Add(line);                i++;            }            dataGridViewX2.Rows.Add(i);            int qq = list.Count;            for (int a = 0; a < qq; a++)            {                dataGridViewX2.Rows[a].Cells[0].Value = list[a].ToString();            }            //列宽自适应            dataGridViewX2.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.AllCells;            dataGridViewX2.ReadOnly = true;        }
      
     

写入Text

try                {                    MultiFormatWriter mutiWriter = new com.google.zxing.MultiFormatWriter();                    ByteMatrix bm = mutiWriter.encode( table.Rows[0]["CarID"].ToString() , com.google.zxing.BarcodeFormat.QR_CODE, 363, 150);                    Bitmap img = bm.ToBitmap();                    string filename = "C:\\Users\\Administrator\\Desktop\\Car_Messages\\" + table.Rows[0]["MenName"].ToString()  + table.Rows[0]["CarID"].ToString() + ".jpg";                    img.Save(filename, System.Drawing.Imaging.ImageFormat.Jpeg);                }                catch (Exception ee)                { MessageBox.Show(ee.Message); }            }