[No000083]文件与文件夹操作

        #region Folder option 文件夹操作

        /// <summary>
        /// 指定目录是否存在
        /// </summary>
        /// <param name="dirPath">文件夹路径</param>
        /// <returns></returns>
        public static bool DirExist(string dirPath)
        {
            try
            {
                if (Directory.Exists(dirPath))
                {
                    return true;
                }
                else
                {
                    return false;
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine("DirExit error" + ex.Message);
                return false;
            }
        }

        /// <summary>
        /// 创建目录
        /// </summary>
        /// <param name="dirPath"></param>
        public static void MakeDir(string dirPath)
        {
            try
            {
                if (!DirExist(dirPath))
                {
                    Directory.CreateDirectory(dirPath);
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine("MakeDir error" + ex.Message);
                //throw;
            }
        }

        #endregion Folder option 文件夹操作

        #region File option 文件操作

        /// <summary>
        /// 指定文件是否存在
        /// </summary>
        /// <param name="filePath"></param>
        /// <returns></returns>
        public static bool FileExist(string filePath)
        {
            try
            {
                if (File.Exists(filePath))
                {
                    return true;
                }
                else
                {
                    return false;
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine("FileExist error" + ex.Message);
                return false;
            }
        }

        /// <summary>
        /// 读文件
        /// </summary>
        /// <param name="filePath">文件路径</param>
        /// <returns></returns>
        public static string ReadFile(string filePath)
        {
            try
            {
                string content = "";
                if (FileExist(filePath))
                {
                    StreamReader sr = new StreamReader(filePath, Encoding.UTF8);
                    content = sr.ReadToEnd(); //读取全部内容
                    sr.Close();
                }
                return content;
            }
            catch (Exception ex)
            {
                Console.WriteLine("ReadFile error" + ex.Message);
                return "";
            }
        }

        /// <summary>
        /// 写文件
        /// </summary>
        /// <param name="filePath">文件路径</param>
        /// <param name="content">写入的内容</param>
        public static void WriteFile(string filePath, string content)
        {
            try
            {
                string fileDirPath = Path.GetDirectoryName(filePath);
                if (!DirExist(fileDirPath))
                {
                    MakeDir(fileDirPath);
                }
                FileStream fileStream = new FileStream(filePath, FileMode.OpenOrCreate, FileAccess.ReadWrite, FileShare.ReadWrite); //创建写入文件
                StreamWriter sw = new StreamWriter(fileStream, Encoding.UTF8);
                sw.WriteLine(content); //开始写入值
                fileStream.Flush(); //确保全部写入
                sw.Close();
                fileStream.Close();
            }
            catch (Exception ex)
            {
                Console.WriteLine("WriteFile error" + ex);
            }
        }

        #endregion File option 文件操作
原文地址:https://www.cnblogs.com/Chary/p/No000083.html