using System;
using System.Text;
using System.IO;
namespace HelloCsharp.Utilities
{
 /// <summary>
 /// 文件操作類
 /// </summary>
 public static class DirFile
 {
  #region 檢測(cè)指定目錄是否存在
  /// <summary>
  /// 檢測(cè)指定目錄是否存在
  /// </summary>
  /// <param name="directoryPath">目錄的絕對(duì)路徑</param>
  /// <returns></returns>
  public static bool IsExistDirectory(string directoryPath)
  {
   return Directory.Exists(directoryPath);
  }
  #endregion
  #region 檢測(cè)指定文件是否存在,如果存在返回true
  /// <summary>
  /// 檢測(cè)指定文件是否存在,如果存在則返回true。
  /// </summary>
  /// <param name="filePath">文件的絕對(duì)路徑</param>  
  public static bool IsExistFile(string filePath)
  {
   return File.Exists(filePath);
  }
  #endregion
  #region 獲取指定目錄中的文件列表
  /// <summary>
  /// 獲取指定目錄中所有文件列表
  /// </summary>
  /// <param name="directoryPath">指定目錄的絕對(duì)路徑</param>
  public static string[] GetFileNames(string directoryPath)
  {
   //如果目錄不存在，則拋出異常
   if (!IsExistDirectory(directoryPath))
   {
    throw new FileNotFoundException();
   }
   //獲取文件列表
   return Directory.GetFiles(directoryPath);
  }
  #endregion
  #region 獲取指定目錄中所有子目錄列表,若要搜索嵌套的子目錄列表,請(qǐng)使用重載方法.
  /// <summary>
  /// 獲取指定目錄中所有子目錄列表,若要搜索嵌套的子目錄列表,請(qǐng)使用重載方法.
  /// </summary>
  /// <param name="directoryPath">指定目錄的絕對(duì)路徑</param>
  public static string[] GetDirectories(string directoryPath)
  {
   try
   {
    return Directory.GetDirectories(directoryPath);
   }
   catch (IOException ex)
   {
    throw ex;
   }
  }
  #endregion
  #region 獲取指定目錄及子目錄中所有文件列表
  /// <summary>
  /// 獲取指定目錄及子目錄中所有文件列表
  /// </summary>
  /// <param name="directoryPath">指定目錄的絕對(duì)路徑</param>
  /// <param name="searchPattern">模式字符串，"*"代表0或N個(gè)字符，"?"代表1個(gè)字符。
  /// 范例："Log*.xml"表示搜索所有以Log開(kāi)頭的Xml文件。</param>
  /// <param name="isSearchChild">是否搜索子目錄</param>
  public static string[] GetFileNames(string directoryPath, string searchPattern, bool isSearchChild)
  {
   //如果目錄不存在，則拋出異常
   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 檢測(cè)指定目錄是否為空
  /// <summary>
  /// 檢測(cè)指定目錄是否為空
  /// </summary>
  /// <param name="directoryPath">指定目錄的絕對(duì)路徑</param>
  public static bool IsEmptyDirectory(string directoryPath)
  {
   try
   {
    //判斷是否存在文件
    string[] fileNames = GetFileNames(directoryPath);
    if (fileNames.Length > 0)
    {
     return false;
    }
    //判斷是否存在文件夾
    string[] directoryNames = GetDirectories(directoryPath);
    if (directoryNames.Length > 0)
    {
     return false;
    }
    return true;
   }
   catch
   {
    //這里記錄日志
    //LogHelper.WriteTraceLog(TraceLogLevel.Error, ex.Message);
    return true;
   }
  }
  #endregion
  #region 檢測(cè)指定目錄中是否存在指定的文件
  /// <summary>
  /// 檢測(cè)指定目錄中是否存在指定的文件,若要搜索子目錄請(qǐng)使用重載方法.
  /// </summary>
  /// <param name="directoryPath">指定目錄的絕對(duì)路徑</param>
  /// <param name="searchPattern">模式字符串，"*"代表0或N個(gè)字符，"?"代表1個(gè)字符。
  /// 范例："Log*.xml"表示搜索所有以Log開(kāi)頭的Xml文件。</param>
  public static bool Contains(string directoryPath, string searchPattern)
  {
   try
   {
    //獲取指定的文件列表
    string[] fileNames = GetFileNames(directoryPath, searchPattern, false);

    //判斷指定文件是否存在
    if (fileNames.Length == 0)
    {
     return false;
    }
    else
    {
     return true;
    }
   }
   catch (Exception ex)
   {
    throw new Exception(ex.Message);
    //LogHelper.WriteTraceLog(TraceLogLevel.Error, ex.Message);
   }
  }
  /// <summary>
  /// 檢測(cè)指定目錄中是否存在指定的文件
  /// </summary>
  /// <param name="directoryPath">指定目錄的絕對(duì)路徑</param>
  /// <param name="searchPattern">模式字符串，"*"代表0或N個(gè)字符，"?"代表1個(gè)字符。
  /// 范例："Log*.xml"表示搜索所有以Log開(kāi)頭的Xml文件。</param> 
  /// <param name="isSearchChild">是否搜索子目錄</param>
  public static bool Contains(string directoryPath, string searchPattern, bool isSearchChild)
  {
   try
   {
    //獲取指定的文件列表
    string[] fileNames = GetFileNames(directoryPath, searchPattern, true);

    //判斷指定文件是否存在
    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 創(chuàng)建目錄
  /// <summary>
  /// 創(chuàng)建目錄
  /// </summary>
  /// <param name="dir">要?jiǎng)?chuàng)建的目錄路徑包括目錄名</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 刪除目錄
  /// <summary>
  /// 刪除目錄
  /// </summary>
  /// <param name="dir">要?jiǎng)h除的目錄路徑和名稱</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 刪除文件
  /// <summary>
  /// 刪除文件
  /// </summary>
  /// <param name="file">要?jiǎng)h除的文件路徑和名稱</param>
  public static void DeleteFile(string file)
  {
   if (File.Exists(System.Web.HttpContext.Current.Request.PhysicalApplicationPath + file))
    File.Delete(System.Web.HttpContext.Current.Request.PhysicalApplicationPath + file);
  }
  #endregion
  #region 創(chuàng)建文件
  /// <summary>
  /// 創(chuàng)建文件
  /// </summary>
  /// <param name="dir">帶后綴的文件名</param>
  /// <param name="pagestr">文件內(nèi)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("GB2312"));
   sw.Write(pagestr);
   sw.Close();
  }
  #endregion
  #region 移動(dòng)文件(剪貼--粘貼)
  /// <summary>
  /// 移動(dòng)文件(剪貼--粘貼)
  /// </summary>
  /// <param name="dir1">要移動(dòng)的文件的路徑及全名(包括后綴)</param>
  /// <param name="dir2">文件移動(dòng)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 (File.Exists(System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "\\" + dir1))
    File.Move(System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "\\" + dir1, System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "\\" + dir2);
  }
  #endregion
  #region 復(fù)制文件
  /// <summary>
  /// 復(fù)制文件
  /// </summary>
  /// <param name="dir1">要復(fù)制的文件的路徑已經(jīng)全名(包括后綴)</param>
  /// <param name="dir2">目標(biāo)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 (File.Exists(System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "\\" + dir1))
   {
    File.Copy(System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "\\" + dir1, System.Web.HttpContext.Current.Request.PhysicalApplicationPath + "\\" + dir2, true);
   }
  }
  #endregion
  #region 根據(jù)時(shí)間得到目錄名 / 格式:yyyyMMdd 或者 HHmmssff
  /// <summary>
  /// 根據(jù)時(shí)間得到目錄名yyyyMMdd
  /// </summary>
  /// <returns></returns>
  public static string GetDateDir()
  {
   return DateTime.Now.ToString("yyyyMMdd");
  }
  /// <summary>
  /// 根據(jù)時(shí)間得到文件名HHmmssff
  /// </summary>
  /// <returns></returns>
  public static string GetDateFile()
  {
   return DateTime.Now.ToString("HHmmssff");
  }
  #endregion
  #region 復(fù)制文件夾
  /// <summary>
  /// 復(fù)制文件夾(遞歸)
  /// </summary>
  /// <param name="varFromDirectory">源文件夾路徑</param>
  /// <param name="varToDirectory">目標(biāo)文件夾路徑</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)
    {
     File.Copy(s, varToDirectory + s.Substring(s.LastIndexOf("\\")), true);
    }
   }
  }
  #endregion
  #region 檢查文件,如果文件不存在則創(chuàng)建
  /// <summary>
  /// 檢查文件,如果文件不存在則創(chuàng)建 
  /// </summary>
  /// <param name="FilePath">路徑,包括文件名</param>
  public static void ExistsFile(string FilePath)
  {
   //if(!File.Exists(FilePath)) 
   //File.Create(FilePath); 
   //以上寫(xiě)法會(huì)報(bào)錯(cuò),詳細(xì)解釋請(qǐng)看下文......... 
   if (!File.Exists(FilePath))
   {
    FileStream fs = File.Create(FilePath);
    fs.Close();
   }
  }
  #endregion
  #region 刪除指定文件夾對(duì)應(yīng)其他文件夾里的文件
  /// <summary>
  /// 刪除指定文件夾對(duì)應(yīng)其他文件夾里的文件
  /// </summary>
  /// <param name="varFromDirectory">指定文件夾路徑</param>
  /// <param name="varToDirectory">對(duì)應(yīng)其他文件夾路徑</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)
    {
     File.Delete(varToDirectory + s.Substring(s.LastIndexOf("\\")));
    }
   }
  }
  #endregion
  #region 從文件的絕對(duì)路徑中獲取文件名( 包含擴(kuò)展名 )
  /// <summary>
  /// 從文件的絕對(duì)路徑中獲取文件名( 包含擴(kuò)展名 )
  /// </summary>
  /// <param name="filePath">文件的絕對(duì)路徑</param>  
  public static string GetFileName(string filePath)
  {
   //獲取文件的名稱
   FileInfo fi = new FileInfo(filePath);
   return fi.Name;
  }
  #endregion
  /// <summary>
  /// 復(fù)制文件參考方法,頁(yè)面中引用
  /// </summary>
  /// <param name="cDir">新路徑</param>
  /// <param name="TempId">模板引擎替換編號(hào)</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();
   // }
   //}
  }
  #region 創(chuàng)建一個(gè)目錄
  /// <summary>
  /// 創(chuàng)建一個(gè)目錄
  /// </summary>
  /// <param name="directoryPath">目錄的絕對(duì)路徑</param>
  public static void CreateDirectory(string directoryPath)
  {
   //如果目錄不存在則創(chuàng)建該目錄
   if (!IsExistDirectory(directoryPath))
   {
    Directory.CreateDirectory(directoryPath);
   }
  }
  #endregion
  #region 創(chuàng)建一個(gè)文件
  /// <summary>
  /// 創(chuàng)建一個(gè)文件。
  /// </summary>
  /// <param name="filePath">文件的絕對(duì)路徑</param>
  public static void CreateFile(string filePath)
  {
   try
   {
    //如果文件不存在則創(chuàng)建該文件
    if (!IsExistFile(filePath))
    {
     //創(chuàng)建一個(gè)FileInfo對(duì)象
     FileInfo file = new FileInfo(filePath);

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

     //關(guān)閉文件流
     fs.Close();
    }
   }
   catch (Exception ex)
   {
    //LogHelper.WriteTraceLog(TraceLogLevel.Error, ex.Message);
    throw ex;
   }
  }
  /// <summary>
  /// 創(chuàng)建一個(gè)文件,并將字節(jié)流寫(xiě)入文件。
  /// </summary>
  /// <param name="filePath">文件的絕對(duì)路徑</param>
  /// <param name="buffer">二進(jìn)制流數(shù)據(jù)</param>
  public static void CreateFile(string filePath, byte[] buffer)
  {
   try
   {
    //如果文件不存在則創(chuàng)建該文件
    if (!IsExistFile(filePath))
    {
     //創(chuàng)建一個(gè)FileInfo對(duì)象
     FileInfo file = new FileInfo(filePath);

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

     //寫(xiě)入二進(jìn)制流
     fs.Write(buffer, 0, buffer.Length);

     //關(guān)閉文件流
     fs.Close();
    }
   }
   catch (Exception ex)
   {
    //LogHelper.WriteTraceLog(TraceLogLevel.Error, ex.Message);
    throw ex;
   }
  }
  #endregion
  #region 獲取文本文件的行數(shù)
  /// <summary>
  /// 獲取文本文件的行數(shù)
  /// </summary>
  /// <param name="filePath">文件的絕對(duì)路徑</param>  
  public static int GetLineCount(string filePath)
  {
   //將文本文件的各行讀到一個(gè)字符串?dāng)?shù)組中
   string[] rows = File.ReadAllLines(filePath);

   //返回行數(shù)
   return rows.Length;
  }
  #endregion

  #region 獲取一個(gè)文件的長(zhǎng)度
  /// <summary>
  /// 獲取一個(gè)文件的長(zhǎng)度,單位為Byte
  /// </summary>
  /// <param name="filePath">文件的絕對(duì)路徑</param>  
  public static int GetFileSize(string filePath)
  {
   //創(chuàng)建一個(gè)文件對(duì)象
   FileInfo fi = new FileInfo(filePath);

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

  #region 獲取指定目錄中的子目錄列表
  /// <summary>
  /// 獲取指定目錄及子目錄中所有子目錄列表
  /// </summary>
  /// <param name="directoryPath">指定目錄的絕對(duì)路徑</param>
  /// <param name="searchPattern">模式字符串，"*"代表0或N個(gè)字符，"?"代表1個(gè)字符。
  /// 范例："Log*.xml"表示搜索所有以Log開(kāi)頭的Xml文件。</param>
  /// <param name="isSearchChild">是否搜索子目錄</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 向文本文件寫(xiě)入內(nèi)容

  /// <summary>
  /// 向文本文件中寫(xiě)入內(nèi)容
  /// </summary>
  /// <param name="filePath">文件的絕對(duì)路徑</param>
  /// <param name="text">寫(xiě)入的內(nèi)容</param>
  /// <param name="encoding">編碼</param>
  public static void WriteText(string filePath, string text, Encoding encoding)
  {
   //向文件寫(xiě)入內(nèi)容
   File.WriteAllText(filePath, text, encoding);
  }
  #endregion

  #region 向文本文件的尾部追加內(nèi)容
  /// <summary>
  /// 向文本文件的尾部追加內(nèi)容
  /// </summary>
  /// <param name="filePath">文件的絕對(duì)路徑</param>
  /// <param name="content">寫(xiě)入的內(nèi)容</param>
  public static void AppendText(string filePath, string content)
  {
   File.AppendAllText(filePath, content);
  }
  #endregion

  #region 將現(xiàn)有文件的內(nèi)容復(fù)制到新文件中
  /// <summary>
  /// 將源文件的內(nèi)容復(fù)制到目標(biāo)文件中
  /// </summary>
  /// <param name="sourceFilePath">源文件的絕對(duì)路徑</param>
  /// <param name="destFilePath">目標(biāo)文件的絕對(duì)路徑</param>
  public static void Copy(string sourceFilePath, string destFilePath)
  {
   File.Copy(sourceFilePath, destFilePath, true);
  }
  #endregion

  #region 將文件移動(dòng)到指定目錄
  /// <summary>
  /// 將文件移動(dòng)到指定目錄
  /// </summary>
  /// <param name="sourceFilePath">需要移動(dòng)的源文件的絕對(duì)路徑</param>
  /// <param name="descDirectoryPath">移動(dòng)到的目錄的絕對(duì)路徑</param>
  public static void Move(string sourceFilePath, string descDirectoryPath)
  {
   //獲取源文件的名稱
   string sourceFileName = GetFileName(sourceFilePath);

   if (IsExistDirectory(descDirectoryPath))
   {
    //如果目標(biāo)中存在同名文件,則刪除
    if (IsExistFile(descDirectoryPath + "\\" + sourceFileName))
    {
     DeleteFile(descDirectoryPath + "\\" + sourceFileName);
    }
    //將文件移動(dòng)到指定目錄
    File.Move(sourceFilePath, descDirectoryPath + "\\" + sourceFileName);
   }
  }
  #endregion


  #region 從文件的絕對(duì)路徑中獲取文件名( 不包含擴(kuò)展名 )
  /// <summary>
  /// 從文件的絕對(duì)路徑中獲取文件名( 不包含擴(kuò)展名 )
  /// </summary>
  /// <param name="filePath">文件的絕對(duì)路徑</param>  
  public static string GetFileNameNoExtension(string filePath)
  {
   //獲取文件的名稱
   FileInfo fi = new FileInfo(filePath);
   return fi.Name.Split('.')[0];
  }
  #endregion

  #region 從文件的絕對(duì)路徑中獲取擴(kuò)展名
  /// <summary>
  /// 從文件的絕對(duì)路徑中獲取擴(kuò)展名
  /// </summary>
  /// <param name="filePath">文件的絕對(duì)路徑</param>  
  public static string GetExtension(string filePath)
  {
   //獲取文件的名稱
   FileInfo fi = new FileInfo(filePath);
   return fi.Extension;
  }
  #endregion

  #region 清空指定目錄
  /// <summary>
  /// 清空指定目錄下所有文件及子目錄,但該目錄依然保存.
  /// </summary>
  /// <param name="directoryPath">指定目錄的絕對(duì)路徑</param>
  public static void ClearDirectory(string directoryPath)
  {
   if (IsExistDirectory(directoryPath))
   {
    //刪除目錄中所有的文件
    string[] fileNames = GetFileNames(directoryPath);
    for (int i = 0; i < fileNames.Length; i++)
    {
     DeleteFile(fileNames);
    }

    //刪除目錄中所有的子目錄
    string[] directoryNames = GetDirectories(directoryPath);
    for (int i = 0; i < directoryNames.Length; i++)
    {
     DeleteDirectory(directoryNames);
    }
   }
  }
  #endregion

  #region 清空文件內(nèi)容
  /// <summary>
  /// 清空文件內(nèi)容
  /// </summary>
  /// <param name="filePath">文件的絕對(duì)路徑</param>
  public static void ClearFile(string filePath)
  {
   //刪除文件
   File.Delete(filePath);

   //重新創(chuàng)建該文件
   CreateFile(filePath);
  }
  #endregion

  #region 刪除指定目錄
  /// <summary>
  /// 刪除指定目錄及其所有子目錄
  /// </summary>
  /// <param name="directoryPath">指定目錄的絕對(duì)路徑</param>
  public static void DeleteDirectory(string directoryPath)
  {
   if (IsExistDirectory(directoryPath))
   {
    Directory.Delete(directoryPath, true);
   }
  }
  #endregion
 }
}