C#文件操作笔记

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• c# 以换行(\r\n)拆分字符串

  字符串数组形式：

  string[] striparr = strip.Split(new string[] { "\r\n" }, StringSplitOptions.None);

  striparr = striparr.Where(s => !string.IsNullOrEmpty(s)).ToArray();

  List<sting>形式：

  List<string> striparr = strip.Split(new string[] { "\r\n" }, StringSplitOptions.None).ToList();
  striparr = striparr.Where(s => !string.IsNullOrEmpty(s)).ToList();

• C# 读取文件内容

  　　/// <summary>
     /// 读取txt文件内容
     /// </summary>
     /// <param name="Path">文件地址</param>
     public void ReadTxtContent(string Path)
       {
         StreamReader sr = new StreamReader(Path, Encoding.Default);
         string content;
         while ((content = sr.ReadLine()) != null)
          {
             Console.WriteLine(content.ToString());
        }
    }

• C#根据路径删除文件或文件夹

          /// <summary>
          /// 根据路径删除文件
          /// </summary>
          /// <param name="path"></param>
          public void DeleteFile(string path)
          {
              FileAttributes attr = File.GetAttributes(path);
              if (attr == FileAttributes.Directory)
              {
                  Directory.Delete(path,true);
              }
              else
              {
                  File.Delete(path);
              }
          }

• C# 生成随机字符[转载]

  #region 5.0 生成随机字符串 + static string GetRandomString(int length, bool useNum, bool useLow, bool useUpp, bool useSpe, string custom)
  ///<summary>
  ///生成随机字符串
  ///</summary>
  ///<param name="length">目标字符串的长度</param>
  ///<param name="useNum">是否包含数字，1=包含，默认为包含</param>
  ///<param name="useLow">是否包含小写字母，1=包含，默认为包含</param>
  ///<param name="useUpp">是否包含大写字母，1=包含，默认为包含</param>
  ///<param name="useSpe">是否包含特殊字符，1=包含，默认为不包含</param>
  ///<param name="custom">要包含的自定义字符，直接输入要包含的字符列表</param>
  ///<returns>指定长度的随机字符串</returns>
  public static string GetRandomString(int length, bool useNum, bool useLow, bool useUpp, bool useSpe, string custom)
  {
  byte[] b = new byte[4];
  new System.Security.Cryptography.RNGCryptoServiceProvider().GetBytes(b);
  Random r = new Random(BitConverter.ToInt32(b, 0));
  string s = null, str = custom;
  if (useNum == true) { str += "0123456789"; }
  if (useLow == true) { str += "abcdefghijklmnopqrstuvwxyz"; }
  if (useUpp == true) { str += "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; }
  if (useSpe == true) { str += "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~"; }
  for (int i = 0; i < length; i++)
  {
  s += str.Substring(r.Next(0, str.Length - 1), 1);
  }
  return s;
  }
  #endregion

• /// <summary>
  /// 创建一个简易的文件
  /// </summary>
  /// <param name="Path">绝对路径</param>
  /// <param name="Content">向文件写入的内容</param>
  void MakeNewFile(string Path,string Content)
  {
  if (File.Exists(Path))
  {
  DebugLog("文件已存在！");
  }
  else
  {
  FileStream fs = new FileStream(Path, FileMode.CreateNew);
  StreamWriter sw = new StreamWriter(fs);
  sw.Write(Content); //这里是写入的内容
  sw.Flush();
  }
  }