文件夹文件操作类

/// <summary>
/// DirFileHelper
/// 描 述：文件夹文件操作类
/// </summary>
public static class DirFileHelper
{
    #region 检测指定目录是否存在
    /// <summary>
    /// 检测指定目录是否存在
    /// </summary>
    /// <param name="directoryPath">目录的绝对路径</param>
    /// <returns></returns>
    public static bool IsExistDirectory(string directoryPath)
    {
        return Directory.Exists(directoryPath);
    }
    #endregion

    #region 获取指定目录中的文件列表
    /// <summary>
    /// 获取指定目录中所有文件列表
    /// </summary>
    /// <param name="directoryPath">指定目录的绝对路径</param>        
    public static string[] GetFileNames(string directoryPath)
    {
        //如果目录不存在，则抛出异常
        if (!IsExistDirectory(directoryPath))
        {
            throw new FileNotFoundException();
        }
        //获取文件列表
        return Directory.GetFiles(directoryPath);
    }
    #endregion

    #region 获取指定目录中所有子目录列表
    /// <summary>
    /// 获取指定目录中所有子目录列表
    /// </summary>
    /// <param name="directoryPath">指定目录的绝对路径</param>        
    public static string[] GetDirectories(string directoryPath)
    {
        //如果目录不存在，则抛出异常
        if (!IsExistDirectory(directoryPath))
        {
            throw new FileNotFoundException();
        }
        return Directory.GetDirectories(directoryPath);
    }
    #endregion

    #region 获取指定目录及子目录中所有文件列表(搜索)
    /// <summary>
    /// 获取指定目录及子目录中所有文件列表
    /// </summary>
    /// <param name="directoryPath">指定目录的绝对路径</param>
    /// <param name="searchPattern">模式字符串，"*"代表0或N个字符，"?"代表1个字符。
    /// 范例："Log*.xml"表示搜索所有以Log开头的Xml文件。</param>
    /// <param name="isSearchChild">是否搜索子目录</param>
    public static string[] GetFileNames(string directoryPath, string searchPattern, bool isSearchChild)
    {
        //如果目录不存在，则抛出异常
        if (!IsExistDirectory(directoryPath))
        {
            throw new FileNotFoundException();
        }
        try
        {
            if (isSearchChild)
            {
                return Directory.GetFiles(directoryPath, searchPattern, SearchOption.AllDirectories);
            }
            else
            {
                return Directory.GetFiles(directoryPath, searchPattern, SearchOption.TopDirectoryOnly);
            }
        }
        catch (IOException ex)
        {
            throw ex;
        }
    }
    #endregion

    #region 根据时间获取指定路径目录下的 指定后缀名的 的所有文件
    /// <summary>
    /// 根据时间获取指定路径目录下的 指定后缀名的 的所有文件
    /// </summary>
    /// <param name="path">文件路径</param>
    /// <param name="Extension">后缀名 比如.txt</param>
    /// <returns></returns>
    public static DataRow[] GetFilesByTime(string path, string Extension)
    {
        if (Directory.Exists(path))
        {
            string fielExts = string.Format("*{0}", Extension);
            string[] files = Directory.GetFiles(path, fielExts);
            if (files.Length > 0)
            {
                DataTable table = new DataTable();
                table.Columns.Add(new DataColumn("filename", Type.GetType("System.String")));
                table.Columns.Add(new DataColumn("createtime", Type.GetType("System.DateTime")));
                for (int i = 0; i < files.Length; i++)
                {
                    DataRow row = table.NewRow();
                    DateTime creationTime = System.IO.File.GetCreationTime(files[i]);
                    string fileName = Path.GetFileName(files[i]);
                    row["filename"] = fileName;
                    row["createtime"] = creationTime;
                    table.Rows.Add(row);
                }
                return table.Select(string.Empty, "createtime desc");
            }
        }
        return new DataRow[0];
    }
    #endregion

    #region 检测指定目录中是否存在指定的文件
    /// <summary>
    /// 检测指定目录中是否存在指定的文件
    /// </summary>
    /// <param name="directoryPath">指定目录的绝对路径</param>
    /// <param name="searchPattern">模式字符串，"*"代表0或N个字符，"?"代表1个字符。
    /// 范例："Log*.xml"表示搜索所有以Log开头的Xml文件。</param> 
    /// <param name="isSearchChild">是否搜索子目录</param>
    public static bool Contains(string directoryPath, string searchPattern, bool isSearchChild = false)
    {
        try
        {
            //获取指定的文件列表
            string[] fileNames = GetFileNames(directoryPath, searchPattern, isSearchChild);

            //判断指定文件是否存在
            if (fileNames.Length == 0)
            {
                return false;
            }
            else
            {
                return true;
            }
        }
        catch (Exception ex)
        {
            throw new Exception(ex.Message);
            //LogHelper.WriteTraceLog(TraceLogLevel.Error, ex.Message);
        }
    }
    #endregion

    #region 检测指定目录是否为空
    /// <summary>
    /// 检测指定目录是否为空
    /// </summary>
    /// <param name="directoryPath">指定目录的绝对路径</param>        
    public static bool IsEmptyDirectory(string directoryPath)
    {
        try
        {
            //判断是否存在文件
            string[] fileNames = GetFileNames(directoryPath);
            if (fileNames.Length > 0)
            {
                return false;
            }

            //判断是否存在文件夹
            string[] directoryNames = GetDirectories(directoryPath);
            if (directoryNames.Length > 0)
            {
                return false;
            }

            return true;
        }
        catch
        {
            //这里记录日志
            //LogHelper.WriteTraceLog(TraceLogLevel.Error, ex.Message);
            return true;
        }
    }
    #endregion

    #region 创建目录
    /// <summary>
    /// 创建目录
    /// </summary>
    /// <param name="dir">要创建的目录路径包括目录名</param>
    public static void CreateDir(string dir)
    {
        if (dir.Length == 0) return;
        if (!Directory.Exists(System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "\\" + dir))
            Directory.CreateDirectory(System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "\\" + dir);
    }
    #endregion

    #region 删除目录
    /// <summary>
    /// 删除目录
    /// </summary>
    /// <param name="dir">要删除的目录路径和名称</param>
    public static void DeleteDir(string dir)
    {
        if (dir.Length == 0) return;
        if (Directory.Exists(System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "\\" + dir))
            Directory.Delete(System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "\\" + dir);
    }
    #endregion

    #region 清空指定目录
    /// <summary>
    /// 清空指定目录下所有文件及子目录,但该目录依然保存.
    /// </summary>
    /// <param name="directoryPath">指定目录的绝对路径</param>
    public static void ClearDirectory(string directoryPath)
    {
        directoryPath = HttpContext.Current.Server.MapPath(directoryPath);
        if (IsExistDirectory(directoryPath))
        {
            //删除目录中所有的文件
            string[] fileNames = GetFileNames(directoryPath);
            for (int i = 0; i < fileNames.Length; i++)
            {
                DeleteFile(fileNames[i]);
            }
            //删除目录中所有的子目录
            string[] directoryNames = GetDirectories(directoryPath);
            for (int i = 0; i < directoryNames.Length; i++)
            {
                DeleteDir(directoryNames[i]);
            }
        }
    }
    #endregion

    #region 复制文件夹
    /// <summary>
    /// 复制文件夹(递归)
    /// </summary>
    /// <param name="varFromDirectory">源文件夹路径</param>
    /// <param name="varToDirectory">目标文件夹路径</param>
    public static void CopyFolder(string varFromDirectory, string varToDirectory)
    {
        Directory.CreateDirectory(varToDirectory);

        if (!Directory.Exists(varFromDirectory)) return;

        string[] directories = Directory.GetDirectories(varFromDirectory);

        if (directories.Length > 0)
        {
            foreach (string d in directories)
            {
                CopyFolder(d, varToDirectory + d.Substring(d.LastIndexOf("\\")));
            }
        }
        string[] files = Directory.GetFiles(varFromDirectory);
        if (files.Length > 0)
        {
            foreach (string s in files)
            {
                System.IO.File.Copy(s, varToDirectory + s.Substring(s.LastIndexOf("\\")), true);
            }
        }
    }
    #endregion

    #region 检测指定文件是否存在,如果存在返回true
    /// <summary>
    /// 检测指定文件是否存在,如果存在则返回true。
    /// </summary>
    /// <param name="filePath">文件的绝对路径</param>        
    public static bool IsExistFile(string filePath)
    {
        return File.Exists(filePath);
    }
    /// <summary>
    ///  检测指定文件是否存在,如果存在则返回true。
    /// </summary>
    /// <param name="filePath">文件的相对路径</param>
    /// <returns></returns>
    public static bool IsExistFileEx(string filePath)
    {
        string rootPath = Assembly.GetExecutingAssembly().CodeBase.Replace("/bin/Learun.Util.DLL", "").Replace("file:///", "");
        return File.Exists(rootPath + filePath);
    }
    #endregion

    #region 创建文件
    /// <summary>
    /// 创建文件
    /// </summary>
    /// <param name="dir">相对路径</param>
    /// <param name="pagestr">文件内容</param>
    public static void CreateFile(string dir, string pagestr)
    {
        dir = dir.Replace("/", "\\");
        if (dir.IndexOf("\\") > -1)
            CreateDir(dir.Substring(0, dir.LastIndexOf("\\")));
        System.IO.StreamWriter sw = new System.IO.StreamWriter(System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "\\" + dir, false, System.Text.Encoding.GetEncoding("utf-8"));
        sw.Write(pagestr);
        sw.Close();
    }
    /// <summary>
    /// 创建一个文件。
    /// </summary>
    /// <param name="filePath">文件的绝对路径</param>
    public static void CreateFile(string filePath)
    {
        try
        {
            //如果文件不存在则创建该文件
            if (!IsExistFile(filePath))
            {
                //创建一个FileInfo对象
                FileInfo file = new FileInfo(filePath);

                //创建文件
                FileStream fs = file.Create();

                //关闭文件流
                fs.Close();
            }
        }
        catch (Exception ex)
        {
            //LogHelper.WriteTraceLog(TraceLogLevel.Error, ex.Message);
            throw ex;
        }
    }

    /// <summary>
    /// 创建一个文件,并将字节流写入文件。
    /// </summary>
    /// <param name="filePath">文件的绝对路径</param>
    /// <param name="buffer">二进制流数据</param>
    public static void CreateFile(string filePath, byte[] buffer)
    {
        try
        {
            //如果文件不存在则创建该文件
            if (!IsExistFile(filePath))
            {
                //创建一个FileInfo对象
                FileInfo file = new FileInfo(filePath);

                //创建文件
                FileStream fs = file.Create();

                //写入二进制流
                fs.Write(buffer, 0, buffer.Length);

                //关闭文件流
                fs.Close();
            }
        }
        catch (Exception ex)
        {
            //LogHelper.WriteTraceLog(TraceLogLevel.Error, ex.Message);
            throw ex;
        }
    }
    /// <summary>
    /// 创建文件
    /// </summary>
    /// <param name="path">绝对路径</param>
    /// <param name="content">内容</param>
    public static void CreateFileContent(string path, string content)
    {
        FileInfo fi = new FileInfo(path);
        var di = fi.Directory;
        if (!di.Exists)
        {
            di.Create();
        }
        StreamWriter sw = new StreamWriter(path, false, System.Text.Encoding.GetEncoding("utf-8"));
        sw.Write(content);
        sw.Close();
    }
    /// <summary>
    /// 创建文件
    /// </summary>
    /// <param name="path">绝对路径</param>
    /// <param name="content">内容</param>
    /// <param name="encoding">编码格式</param>
    public static void CreateFileContent(string path, string content, string encoding)
    {
        FileInfo fi = new FileInfo(path);
        var di = fi.Directory;
        if (!di.Exists)
        {
            di.Create();
        }
        StreamWriter sw = new StreamWriter(path, false, System.Text.Encoding.GetEncoding(encoding));
        sw.Write(content);
        sw.Close();
    }

    #endregion

    #region 删除文件
    /// <summary>
    /// 删除文件
    /// </summary>
    /// <param name="file">要删除的文件路径和名称</param>
    public static void DeleteFile(string file)
    {
        if (System.IO.File.Exists(System.Web.HttpContext.Current.Request.PhysicalApplicationPath + file))
        {
            System.IO.File.Delete(System.Web.HttpContext.Current.Request.PhysicalApplicationPath + file);
        }
    }
    /// <summary>
    /// 删除文件
    /// </summary>
    /// <param name="filePath">文件路径</param>
    public static void DeleteFile2(string filePath)
    {
        if (File.Exists(filePath))
        {
            File.Delete(filePath);
        }
    }
    #endregion

    #region 移动文件(剪贴--粘贴)
    /// <summary>
    /// 移动文件(剪贴--粘贴)
    /// </summary>
    /// <param name="dir1">要移动的文件的路径及全名(包括后缀)</param>
    /// <param name="dir2">文件移动到新的位置,并指定新的文件名</param>
    public static void MoveFile(string dir1, string dir2)
    {
        dir1 = dir1.Replace("/", "\\");
        dir2 = dir2.Replace("/", "\\");
        if (System.IO.File.Exists(System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "\\" + dir1))
            System.IO.File.Move(System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "\\" + dir1, System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "\\" + dir2);
    }
    #endregion

    #region 复制文件
    /// <summary>
    /// 复制文件
    /// </summary>
    /// <param name="dir1">要复制的文件的路径已经全名(包括后缀)</param>
    /// <param name="dir2">目标位置,并指定新的文件名</param>
    public static void CopyFile(string dir1, string dir2)
    {
        dir1 = dir1.Replace("/", "\\");
        dir2 = dir2.Replace("/", "\\");
        if (System.IO.File.Exists(System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "\\" + dir1))
        {
            System.IO.File.Copy(System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "\\" + dir1, System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "\\" + dir2, true);
        }
    }
    #endregion

    #region 检查文件,如果文件不存在则创建
    /// <summary>
    /// 检查文件,如果文件不存在则创建  
    /// </summary>
    /// <param name="FilePath">路径,包括文件名</param>
    public static void ExistsFile(string FilePath)
    {
        //if(!File.Exists(FilePath))    
        //File.Create(FilePath);    
        //以上写法会报错,详细解释请看下文.........   
        if (!System.IO.File.Exists(FilePath))
        {
            FileStream fs = System.IO.File.Create(FilePath);
            fs.Close();
        }
    }
    #endregion

    #region 删除指定文件夹对应其他文件夹里的文件
    /// <summary>
    /// 删除指定文件夹对应其他文件夹里的文件
    /// </summary>
    /// <param name="varFromDirectory">指定文件夹路径</param>
    /// <param name="varToDirectory">对应其他文件夹路径</param>
    public static void DeleteFolderFiles(string varFromDirectory, string varToDirectory)
    {
        Directory.CreateDirectory(varToDirectory);

        if (!Directory.Exists(varFromDirectory)) return;

        string[] directories = Directory.GetDirectories(varFromDirectory);

        if (directories.Length > 0)
        {
            foreach (string d in directories)
            {
                DeleteFolderFiles(d, varToDirectory + d.Substring(d.LastIndexOf("\\")));
            }
        }


        string[] files = Directory.GetFiles(varFromDirectory);

        if (files.Length > 0)
        {
            foreach (string s in files)
            {
                System.IO.File.Delete(varToDirectory + s.Substring(s.LastIndexOf("\\")));
            }
        }
    }
    #endregion

    #region 从文件的绝对路径中获取文件名( 包含扩展名 )
    /// <summary>
    /// 从文件的绝对路径中获取文件名( 包含扩展名 )
    /// </summary>
    /// <param name="filePath">文件的绝对路径</param>        
    public static string GetFileName(string filePath)
    {
        //获取文件的名称
        FileInfo fi = new FileInfo(filePath);
        return fi.Name;
    }
    #endregion

    #region 复制文件参考方法,页面中引用
    /// <summary>
    /// 复制文件参考方法,页面中引用
    /// </summary>
    /// <param name="cDir">新路径</param>
    /// <param name="TempId">模板引擎替换编号</param>
    public static void CopyFiles(string cDir, string TempId)
    {
        //if (Directory.Exists(Request.PhysicalApplicationPath + "\\Controls"))
        //{
        //    string TempStr = string.Empty;
        //    StreamWriter sw;
        //    if (File.Exists(Request.PhysicalApplicationPath + "\\Controls\\Default.aspx"))
        //    {
        //        TempStr = File.ReadAllText(Request.PhysicalApplicationPath + "\\Controls\\Default.aspx");
        //        TempStr = TempStr.Replace("{$ChannelId$}", TempId);

        //        sw = new StreamWriter(Request.PhysicalApplicationPath + "\\" + cDir + "\\Default.aspx", false, System.Text.Encoding.GetEncoding("GB2312"));
        //        sw.Write(TempStr);
        //        sw.Close();
        //    }
        //    if (File.Exists(Request.PhysicalApplicationPath + "\\Controls\\Column.aspx"))
        //    {
        //        TempStr = File.ReadAllText(Request.PhysicalApplicationPath + "\\Controls\\Column.aspx");
        //        TempStr = TempStr.Replace("{$ChannelId$}", TempId);

        //        sw = new StreamWriter(Request.PhysicalApplicationPath + "\\" + cDir + "\\List.aspx", false, System.Text.Encoding.GetEncoding("GB2312"));
        //        sw.Write(TempStr);
        //        sw.Close();
        //    }
        //    if (File.Exists(Request.PhysicalApplicationPath + "\\Controls\\Content.aspx"))
        //    {
        //        TempStr = File.ReadAllText(Request.PhysicalApplicationPath + "\\Controls\\Content.aspx");
        //        TempStr = TempStr.Replace("{$ChannelId$}", TempId);

        //        sw = new StreamWriter(Request.PhysicalApplicationPath + "\\" + cDir + "\\View.aspx", false, System.Text.Encoding.GetEncoding("GB2312"));
        //        sw.Write(TempStr);
        //        sw.Close();
        //    }
        //    if (File.Exists(Request.PhysicalApplicationPath + "\\Controls\\MoreDiss.aspx"))
        //    {
        //        TempStr = File.ReadAllText(Request.PhysicalApplicationPath + "\\Controls\\MoreDiss.aspx");
        //        TempStr = TempStr.Replace("{$ChannelId$}", TempId);

        //        sw = new StreamWriter(Request.PhysicalApplicationPath + "\\" + cDir + "\\DissList.aspx", false, System.Text.Encoding.GetEncoding("GB2312"));
        //        sw.Write(TempStr);
        //        sw.Close();
        //    }
        //    if (File.Exists(Request.PhysicalApplicationPath + "\\Controls\\ShowDiss.aspx"))
        //    {
        //        TempStr = File.ReadAllText(Request.PhysicalApplicationPath + "\\Controls\\ShowDiss.aspx");
        //        TempStr = TempStr.Replace("{$ChannelId$}", TempId);

        //        sw = new StreamWriter(Request.PhysicalApplicationPath + "\\" + cDir + "\\Diss.aspx", false, System.Text.Encoding.GetEncoding("GB2312"));
        //        sw.Write(TempStr);
        //        sw.Close();
        //    }
        //    if (File.Exists(Request.PhysicalApplicationPath + "\\Controls\\Review.aspx"))
        //    {
        //        TempStr = File.ReadAllText(Request.PhysicalApplicationPath + "\\Controls\\Review.aspx");
        //        TempStr = TempStr.Replace("{$ChannelId$}", TempId);

        //        sw = new StreamWriter(Request.PhysicalApplicationPath + "\\" + cDir + "\\Review.aspx", false, System.Text.Encoding.GetEncoding("GB2312"));
        //        sw.Write(TempStr);
        //        sw.Close();
        //    }
        //    if (File.Exists(Request.PhysicalApplicationPath + "\\Controls\\Search.aspx"))
        //    {
        //        TempStr = File.ReadAllText(Request.PhysicalApplicationPath + "\\Controls\\Search.aspx");
        //        TempStr = TempStr.Replace("{$ChannelId$}", TempId);

        //        sw = new StreamWriter(Request.PhysicalApplicationPath + "\\" + cDir + "\\Search.aspx", false, System.Text.Encoding.GetEncoding("GB2312"));
        //        sw.Write(TempStr);
        //        sw.Close();
        //    }
        //}
    }
    #endregion

    #region 获取文本文件的行数
    /// <summary>
    /// 获取文本文件的行数
    /// </summary>
    /// <param name="filePath">文件的绝对路径</param>        
    public static int GetLineCount(string filePath)
    {
        //将文本文件的各行读到一个字符串数组中
        string[] rows = System.IO.File.ReadAllLines(filePath);

        //返回行数
        return rows.Length;
    }
    #endregion

    #region 获取一个文件的长度
    /// <summary>
    /// 获取一个文件的长度,单位为Byte
    /// </summary>
    /// <param name="filePath">文件的绝对路径</param>        
    public static int GetFileSize(string filePath)
    {
        //创建一个文件对象
        FileInfo fi = new FileInfo(filePath);

        //获取文件的大小
        return (int)fi.Length;
    }
    #endregion

    #region 获取指定目录中的子目录列表
    /// <summary>
    /// 获取指定目录及子目录中所有子目录列表
    /// </summary>
    /// <param name="directoryPath">指定目录的绝对路径</param>
    /// <param name="searchPattern">模式字符串，"*"代表0或N个字符，"?"代表1个字符。
    /// 范例："Log*.xml"表示搜索所有以Log开头的Xml文件。</param>
    /// <param name="isSearchChild">是否搜索子目录</param>
    public static string[] GetDirectories(string directoryPath, string searchPattern, bool isSearchChild)
    {
        try
        {
            if (isSearchChild)
            {
                return Directory.GetDirectories(directoryPath, searchPattern, SearchOption.AllDirectories);
            }
            else
            {
                return Directory.GetDirectories(directoryPath, searchPattern, SearchOption.TopDirectoryOnly);
            }
        }
        catch (IOException ex)
        {
            throw ex;
        }
    }
    #endregion

    #region 向文本文件写入内容

    /// <summary>
    /// 向文本文件中写入内容
    /// </summary>
    /// <param name="filePath">文件的绝对路径</param>
    /// <param name="text">写入的内容</param>
    /// <param name="encoding">编码</param>
    public static void WriteText(string filePath, string text, Encoding encoding)
    {
        //向文件写入内容
        System.IO.File.WriteAllText(filePath, text, encoding);
    }
    #endregion

    #region 向文本文件的尾部追加内容
    /// <summary>
    /// 向文本文件的尾部追加内容
    /// </summary>
    /// <param name="filePath">文件的绝对路径</param>
    /// <param name="content">写入的内容</param>
    public static void AppendText(string filePath, string content)
    {
        System.IO.File.AppendAllText(filePath, content);
    }
    #endregion

    #region 将现有文件的内容复制到新文件中
    /// <summary>
    /// 将源文件的内容复制到目标文件中
    /// </summary>
    /// <param name="sourceFilePath">源文件的绝对路径</param>
    /// <param name="destFilePath">目标文件的绝对路径</param>
    public static void Copy(string sourceFilePath, string destFilePath)
    {
        System.IO.File.Copy(sourceFilePath, destFilePath, true);
    }
    #endregion

    #region 将文件移动到指定目录
    /// <summary>
    /// 将文件移动到指定目录
    /// </summary>
    /// <param name="sourceFilePath">需要移动的源文件的绝对路径</param>
    /// <param name="descDirectoryPath">移动到的目录的绝对路径</param>
    public static void Move(string sourceFilePath, string descDirectoryPath)
    {
        //获取源文件的名称
        string sourceFileName = GetFileName(sourceFilePath);

        if (IsExistDirectory(descDirectoryPath))
        {
            //如果目标中存在同名文件,则删除
            if (IsExistFile(descDirectoryPath + "\\" + sourceFileName))
            {
                DeleteFile(descDirectoryPath + "\\" + sourceFileName);
            }
            //将文件移动到指定目录
            System.IO.File.Move(sourceFilePath, descDirectoryPath + "\\" + sourceFileName);
        }
    }
    #endregion

    #region 从文件的绝对路径中获取文件名( 不包含扩展名 )
    /// <summary>
    /// 从文件的绝对路径中获取文件名( 不包含扩展名 )
    /// </summary>
    /// <param name="filePath">文件的绝对路径</param>        
    public static string GetFileNameNoExtension(string filePath)
    {
        //获取文件的名称
        FileInfo fi = new FileInfo(filePath);
        return fi.Name.Split('.')[0];
    }
    #endregion

    #region 从文件的绝对路径中获取扩展名
    /// <summary>
    /// 从文件的绝对路径中获取扩展名
    /// </summary>
    /// <param name="filePath">文件的绝对路径</param>        
    public static string GetExtension(string filePath)
    {
        //获取文件的名称
        FileInfo fi = new FileInfo(filePath);
        return fi.Extension;
    }
    #endregion

    #region 清空文件内容
    /// <summary>
    /// 清空文件内容
    /// </summary>
    /// <param name="filePath">文件的绝对路径</param>
    public static void ClearFile(string filePath)
    {
        //删除文件
        System.IO.File.Delete(filePath);

        //重新创建该文件
        CreateFile(filePath);
    }
    #endregion

    #region 获取文件大小并以B，KB，GB，TB
    /// <summary>
    /// 计算文件大小函数(保留两位小数),Size为字节大小
    /// </summary>
    /// <param name="size">初始文件大小</param>
    /// <returns></returns>
    public static string ToFileSize(long size)
    {
        string m_strSize = "";
        long FactSize = 0;
        FactSize = size;
        if (FactSize < 1024.00)
            m_strSize = FactSize.ToString("F2") + " 字节";
        else if (FactSize >= 1024.00 && FactSize < 1048576)
            m_strSize = (FactSize / 1024.00).ToString("F2") + " KB";
        else if (FactSize >= 1048576 && FactSize < 1073741824)
            m_strSize = (FactSize / 1024.00 / 1024.00).ToString("F2") + " MB";
        else if (FactSize >= 1073741824)
            m_strSize = (FactSize / 1024.00 / 1024.00 / 1024.00).ToString("F2") + " GB";
        return m_strSize;
    }
    #endregion

    #region 返回绝对路径
    /// <summary>
    /// 返回绝对路径
    /// </summary>
    /// <param name="filePath">相对路径</param>
    /// <returns></returns>
    public static string GetAbsolutePath(string filePath)
    {
        return HttpContext.Current.Server.MapPath(filePath);
    }
    #endregion

    #region 读取文本文件
    /// <summary>
    /// 读取文本文件
    /// </summary>
    /// <param name="filePath">文件地址</param>
    /// <returns></returns>
    public static string ReadText(string filePath) {
        if (File.Exists(filePath))
        {
            return File.ReadAllText(filePath);
        }
        return "";
    }
    #endregion

}