C# 文件管理及文件的读写

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获取文件路径删除文件夹及文件

/// <summary>/// 获取文件路径/// </summary>/// <param name="filepath"></param>/// <returns></returns>public static string GetFilePath(string filepath){    //文件夹路径    string FolderPath = string.Empty;    try    {        FolderPath = HttpRuntime.AppDomainAppPath + filepath;    }    catch    {        FolderPath = Directory.GetCurrentDirectory() + filepath;    }    try    {        if (!Directory.Exists(FolderPath))        {            Directory.CreateDirectory(FolderPath);        }    }    catch    {        throw new Exception();    }    return FolderPath; } /// <summary> /// 删除文件夹及文件夹下文件 /// </summary> /// <param name="srcPath">需要删除文件夹路径</param> /// <returns></returns> public static bool DelectDir(string srcPath) {     if (Directory.Exists(srcPath))     {         try         {             DirectoryInfo dir = new DirectoryInfo(srcPath);             FileSystemInfo[] fileinfo = dir.GetFileSystemInfos();  //返回目录中所有文件和子目录             foreach (FileSystemInfo i in fileinfo)             {                 if (i is DirectoryInfo)            //判断是否文件夹                 {                     DirectoryInfo subdir = new DirectoryInfo(i.FullName);                     subdir.Delete(true);          //删除子目录和文件                 }                 else                 {                     File.Delete(i.FullName);      //删除指定文件                 }             }             //最后删除文件夹             dir.Delete(true);             return true;         }         catch         {             return false;         }     }     else     {         return false;     } }

读写文件数据

/// <summary>/// 读取文件[读取加密后的文本]/// </summary>/// <param name="FilePath"></param>/// <returns></returns>public static string ReadFile(string FilePath){    try    {        FileStream fs = File.Open(FilePath, FileMode.Open);        byte[] bss = new byte[fs.Length];        int i = fs.Read(bss, 0, (int)fs.Length);        string result = Encoding.Default.GetString(bss);        result = DecodeBase64(Encoding.ASCII, result);        fs.Close();        return result;    }    catch    {        return null;    }}/// <summary>/// 保存文件[保存加密后的文本]/// </summary>/// <param name="FilePath"></param>/// <param name="file"></param>public static void SaveFile(string FilePath, string file){    try    {        file = EncodeBase64(Encoding.ASCII, file);        byte[] bs = Encoding.Default.GetBytes(file);        Stream writer = new FileStream(FilePath, FileMode.Create, FileAccess.Write, FileShare.Write);        writer.Write(bs, 0, bs.Length);        writer.Flush();        writer.Close();    }    catch    {        throw new Exception();    }}

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