C# 读取Text文本，写入Text文本

//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 = ;

            List<string> list = new List<string>();

            while ((line = sr.ReadLine()) != null)

            {

                list.Add(line);

                i++;

            }

            dataGridViewX2.Rows.Add(i);

            int qq = list.Count;

            for (int a = ; a < qq; a++)

            {

                dataGridViewX2.Rows[a].Cells[].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[]["CarID"].ToString() , com.google.zxing.BarcodeFormat.QR_CODE, , );

                    Bitmap img = bm.ToBitmap();

                    string filename = "C:\\Users\\Administrator\\Desktop\\Car_Messages\\" + table.Rows[]["MenName"].ToString()  + table.Rows[]["CarID"].ToString() + ".jpg";

                    img.Save(filename, System.Drawing.Imaging.ImageFormat.Jpeg);

                }

                catch (Exception ee)

                { MessageBox.Show(ee.Message); }

            }