.Net常用技巧_C#写入和读取txt文件

using System.Text.RegularExpressions;
  //脱机数据导出

        private void writeTxt(string str)

        {

            string strFileName = @"\Program Files\firexungengcard\FireXungeng.txt";

            FileInfo file = new FileInfo(strFileName);

            StreamWriter sWriter;

            if (file.Exists)

            {

                sWriter = new StreamWriter(strFileName, true, Encoding.Default); 

                sWriter.WriteLine(str);

                sWriter.Close();

            }

            else

            {

                file.Create().Close();

                sWriter = new StreamWriter(strFileName, true, Encoding.Default);

                sWriter.WriteLine(str);

                sWriter.Close();

            }

        }

          //返回脱机数据 

           private string[] readTxt()

           {

               string strFileName = @"\Program Files\firexungengcard\FireXungeng.txt";

                FileInfo file = new FileInfo(strFileName);

                if (file.Exists)

                {

                    string content = String.Empty;

                    using (StreamReader sr = new StreamReader(strFileName))

                    {

                        content = sr.ReadToEnd();

                    }
                    //拆分字符串 

                    string[] strContentArray = Regex.Split(content, "\r\n", RegexOptions.IgnoreCase);

                    file.Delete();

                    return   strContentArray;

                }

                else 

                {

                    MessageBox.Show("你没有可导入的数据");

                }

                return null;

           }

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