读文件/写文件 类 C#语言

  (绝对原创)   平时每次关于文件读写时,喜欢在网上找资料,现在特地整理出一个文件读写类
个人认为几乎完美,呵呵 :)      若有不足,希望大家指出~~~  谢谢

    /// <summary>
    /// 读写文件类，参数为文件存放地址,读取出/要写入的文件信息,字符编码,读或写
    /// </summary>
    class ReadWritePage
    {
        private string _FilePath;
        /// <summary>
        /// 写文件或读文件的地址
        /// </summary>
        public string FilePath
        {
            get { return _FilePath; }
            set { _FilePath = value; }
        }

        private string _InfoString;
        /// <summary>
        /// 读取或写入文件的信息
        /// </summary>
        public string InfoString
        {
            get { return _InfoString; }
            set { _InfoString = value; }
        }

        private string _CharSet;
        /// <summary>
        /// 设置读写的编码，默认为GB2312
        /// </summary>
        public string CharSet
        {
            get { return _CharSet; }
            set { _CharSet = value; }
        }

        private bool _IsReadWrite;
        /// <summary>
        /// 设置读还是写，读：true;写false
        /// </summary>
        public bool IsReadWrite
        {
            get { return _IsReadWrite; }
            set { _IsReadWrite = value; }
        }

        private string _ErrorString;
        /// <summary>
        /// 读或写失败的原因
        /// </summary>
        public string ErrorString
        {
            get { return _ErrorString; }
            set { _ErrorString = value; }
        }

        public bool ReadWriteFile()
        {
            if (IsReadWrite == true)
            {
                //读文件的方法
                return ReadFile();
            }
            else
            {
 
                //写文件的方法
                return WriteFile();
            }
        }

        private bool WriteFile()
        {
            FileInfo FInfo = new FileInfo(_FilePath);

            //判断文件是否存在
            if (FInfo.Exists == true)
            {
                try
                {
                    //文件目录不存在时，创建文件目录
                    if (Directory.Exists( FInfo.DirectoryName) == false)
                    {
                        DirectoryInfo DI = new DirectoryInfo(FInfo.DirectoryName);
                        DI.Create();
                    }

                    File.WriteAllText(_FilePath, _InfoString, Encoding.GetEncoding(_CharSet));
                }
                catch (IOException e)
                {
                    _ErrorString = "写入文件时,发生异常:" + _FilePath;
                    return false;
                }
                return true;
            }
            else
            {
                //文件已存在时，删除文件，并再次调用本方法
                try
                {
                    FInfo.Delete();
                }
                catch (IOException e)
                {
                    _ErrorString = "写入文件时,文件已存在,删除时发生异常:" + _FilePath;
                    return false;
                }
                return WriteFile();
               
            }
        }

        /// <summary>
        /// 读取文件的方法，成功返回true
        /// </summary>
        /// <returns></returns>
        private bool ReadFile()
        {
            FileInfo FInfo = new FileInfo(_FilePath);
           
            //判断文件是否存在
            if (FInfo.Exists == true)
            {
                //文件大小为0时不读取
                if (FInfo.Length < 1)
                {
                    //字符编码未设置时，默认为GB2312   
                    if (_CharSet == null)
                    {
                        _CharSet = "GB2312";
                    }
                    FileStream FStream = new FileStream(_FilePath, FileMode.Open, FileAccess.Read, FileShare.Read);

                    byte[] data = new byte[FStream.Length];

                    //读取字符开始的位置
                    int OffSet = 0;

                    //读取的长度
                    int remaining = data.Length;

                    while(remaining > 0)
                    {
                        int ReadCount = FStream.Read(data,OffSet,FStream.Length);
                       
                        if(ReadCount <= 0)
                        {
                            _ErrorString = "文件读取到"+ReadCount.ToString()+"失败！";
                            return false;
                        }else
                        {
                            //减少剩余未读取的字节数量
                            remaining -= ReadCount;
                            //增加剩余字节开始位置
                            OffSet += ReadCount;
                        }
                    }

                    //将二进制字节数组转换为字符串
                    _InfoString = System.Text.Encoding.GetEncoding(_CharSet).GetString(data);
                    return true;

                   
                }
                else
                {
                    _ErrorString = string.Format("文件为空,地址为：{0}", _FilePath); ;
                    return false;
                }
            }
            else
            {
                _ErrorString = string.Format("未找到地址为：{0}的文件", _FilePath); ;
                return false;
            }
        }

    }