1using System;
  2using System.IO;
  3using System.Text;
  4
  5namespace Ycweb
  6{
  7    /**//// <summary>
  8    /// Summary description for Class1.
  9    /// </summary>
 10    class CLN
 11    {
 12        /**//// <summary>
 13        /// The main entry point for the application.
 14        /// </summary>
 15        [STAThread]
 16        static void Main(string[] args)
 17        {
 18            //
 19            // TODO: Add code to start application here
 20            //
 21            if(args.Length<1)
 22            {
 23                Console.WriteLine("用法:\n\r\t CLN YourFile.TXT|YourDirectory");
 24            }
 25            else
 26            {
 27                string tmpArg=args[0];
 28
 29                if(tmpArg.StartsWith("/") || tmpArg.StartsWith("?"))
 30                {
 31                    Console.WriteLine("用法:\n\r\t CLN YourFile.TXT|YourDirectory");
 32                }
 33                else
 34                {
 35                    //假定用户提供的参数为目录，则先判断目录是否存在，如果存在则遍历该目录下的所有文本文件并清除行号
 36                    if(System.IO.Directory.Exists(tmpArg))
 37                    {
 38                        Clear Line Numbers For Files In The Directory#region Clear Line Numbers For Files In The Directory
 39                        DirectoryInfo di=new DirectoryInfo(tmpArg);
 40                        FileInfo[] txtFileInfo = di.GetFiles("*.txt");
 41                        if(txtFileInfo.Length>0)
 42                        {
 43                            for(int i=0;i<txtFileInfo.Length;i++)
 44                            {
 45                                Console.WriteLine(ClearLine(txtFileInfo[i].FullName));
 46                            }
 47                        }
 48                        else
 49                        {
 50                            Console.WriteLine(string.Format("指定目录\"{0}\"并不存在要清除行号的文本文件.",tmpArg));
 51                        }
 52
 53                        #endregion
 54                    }
 55                    else
 56                    {
 57                        Clear Line Numbers For The File#region Clear Line Numbers For The File
 58                        //假定用户提供的参数为文件名，则先判断该文件是否存在，如果存在则清除该文件的行号
 59                        if(File.Exists(tmpArg))
 60                        {
 61                            Console.WriteLine(ClearLine(tmpArg));
 62                        }
 63                        else
 64                        {
 65                            Console.WriteLine(string.Format("指定的文件或目录\"{0}\"并不存在,请核对后重试.",tmpArg));
 66                        }
 67
 68                        #endregion
 69                    }
 70                }
 71            }
 72        }
 73    
 74        /**//// <summary>
 75        /// 清除指定文件中的行号
 76        /// </summary>
 77        /// <param name="fileName">文件名,含路径</param>
 78        /// <returns>清除结果信息</returns>
 79        public static string ClearLine(string fileName)
 80        {
 81            string result;
 82            FileInfo fi=new FileInfo(fileName);
 83            string strExtension =fi.Extension;
 84            try
 85            {
 86                using (StreamReader reader = new StreamReader(fileName, Encoding.Default, true))
 87                {
 88                    using (StreamWriter writer = new StreamWriter(fileName.Replace(strExtension,"_clear" + strExtension)))
 89                    {
 90                        char[] lineNum = "#0123456789".ToCharArray();
 91                        string code = null;
 92                        while ((code = reader.ReadLine()) != null)
 93                        {
 94                            code = code.TrimStart();
 95                            code = code.TrimStart(lineNum);
 96                            writer.WriteLine(code);
 97                        }
 98                    }
 99                }
100                result=string.Format("成功清除文件{0}的行号.",fileName);
101            }
102            catch
103            {
104                result=string.Format("清除文件{0}的行号失败.",fileName);
105            }
106
107            return result;
108        }
109    }
110
111}
112