C#中遍历文件夹目录的问题

Question

在ASP.NET中用C#开发，上传整个文件夹（里面包含多层子文件夹），上传后保持文件夹结构不变。我想用树的遍历的方式来做，但对于C#中如何遍历、遍历时用到的参数和方法，以及如何取得树结构还不太了解。另外很可能还有更好的办法，还望高手指点！先谢谢了！

Answer 1

找子目录可以这样做：using System;
using System.IO;class Test 
{
    public static void Main() 
    {
        try 
        {
            // Only get subdirectories that begin with the letter "p."
            string[] dirs = Directory.GetDirectories(@"c:\", "p*");
            Console.WriteLine("The number of directories starting with p is {0}.", dirs.Length);
            foreach (string dir in dirs) 
            {
                Console.WriteLine(dir);
            }
        } 
        catch (Exception e) 
        {
            Console.WriteLine("The process failed: {0}", e.ToString());
        }
    }
}

Answer 2

某个目录下的所有文件：
using System;
using System.IO;class Test 
{
    public static void Main() 
    {
        try 
        {
            // Only get files that begin with the letter "c."
            string[] dirs = Directory.GetFiles(@"c:\", "c*");
            Console.WriteLine("The number of files starting with c is {0}.", dirs.Length);
            foreach (string dir in dirs) 
            {
                Console.WriteLine(dir);
            }
        } 
        catch (Exception e) 
        {
            Console.WriteLine("The process failed: {0}", e.ToString());
        }
    }
}

Answer 3

//取本地目录内的文件名
private void showDirFiles(string strPath)
{
try
{
if (!Directory.Exists(strPath))
{//目录不存在，创建目录
Directory.CreateDirectory(strPath);
} DirectoryInfo mydir=new DirectoryInfo(strPath);
FileInfo [] files=mydir.GetFiles();
this.listBoxC.Items.Clear();//清楚listbox中现有项目
for(int i=0;i<files.Length;i++)
{
this.listBoxC.Items.Add(files[i].ToString());
}
}
catch(Exception ex)
{
MessageBox.Show(ex.Message);
}
}

Answer 4

递归实现查找目录下的所有子目录和文件public void FindFile(string dir)             //参数为指定的目录
{  
//在指定目录及子目录下查找文件,在listBox1中列出子目录及文件
DirectoryInfo Dir=new DirectoryInfo(dir);
try
{
   foreach(DirectoryInfo d in Dir.GetDirectories())  //查找子目录 
{
FindFile(Dir+d.ToString()+"\\");
listBox1.Items.Add(Dir+d.ToString()+"\\");   //listBox1中填加目录名
}
   foreach(FileInfo f in Dir.GetFiles("*.*"))      //查找文件
{
listBox1.Items.Add(Dir+f.ToString());  //listBox1中填加文件名
}
}
catch(Exception e)
{
MessageBox.Show(e.Message);
}

}
调用
private void button1_Click(object sender, System.EventArgs e)
{
string currentdir="F:\\myprogram\\C#\\FileSearch";  //搜索的目录
if(currentdir[currentdir.Length-1]!='\\') //非根目录
currentdir+="\\"; 
FindFile(currentdir);  //调用查找文件函数
}加上 using System.IO;

Answer 5

给个我在c++下文件查找备份文件的函数吧，参考一下：
void  TfrmMain::FileSearch(AnsiString strOldPath,AnsiString strNewPath)
{
  AnsiString strTemp,tmpName,OldPath,NewPath,tmpPath1,tmpPath2;
  TDateTime datetime,dtOld,dtNew,dtNew1;
  TSearchRec FileOld,FileNew;
  int fdFind;
  int fdFindNew;  OldPath=strOldPath;
  NewPath=strNewPath;
  OldPath=OldPath+"\\";
  NewPath=NewPath+"\\";
  /////////////////////////列举所有目录，不存在就创建///////////////////////////
  if(FindFirst(OldPath+"*.*",faAnyFile,FileOld)==0)
  {
   do
      {
         //判断是否是目录，并排除目录“.”和“..”
         if((FileOld.Attr & faDirectory) && FileOld.Name!="." && FileOld.Name!="..")
         {
           
           tmpPath1=OldPath+FileOld.Name;
           tmpPath2=NewPath+FileOld.Name;
           if(!DirectoryExists(tmpPath2))
                CreateDir(tmpPath2);
           //调用函数本身，进入子目录
           FileSearch(tmpPath1,tmpPath2);
          }      } while (FindNext(FileOld) == 0);
     FindClose(FileOld);
  }
  //////////////////////////////////列举所有文件，比较后进行拷贝////////////////
  if(FindFirst(OldPath+"*.*",faAnyFile,FileOld)==0)
  {
         do
       {          if(!(FileOld.Attr & faDirectory))           {
              strTemp=OldPath+FileOld.Name;
              tmpName=NewPath+FileOld.Name;
              fdFind=FindFirst(tmpName,faAnyFile,FileNew);
                if(fdFind==0)
                {
                        AnsiString anotherOldName,anotherNewName;
                        anotherOldName=OldPath+"tmp"+FileOld.Name;
                        anotherNewName=NewPath+"tmp"+FileOld.Name;
                        fdFindNew=FindFirst(anotherNewName,faAnyFile,FileNew);
                        if(fdFindNew==0)
                        {
                                dtOld=FileDateToDateTime(FileAge(strTemp.c_str()));
                                dtNew=FileDateToDateTime(FileAge(tmpName.c_str()));
                                dtNew1=FileDateToDateTime(FileAge(anotherNewName.c_str()));
                                if(dtNew>dtNew1)
                                {
                                     if(dtOld>dtNew1)
                                     {
                                        CopyFile(strTemp.c_str(),anotherNewName.c_str(),FALSE);
                                        iNum++;
                                        txt_info->Lines->Add(IntToStr(iNum)+") "+strTemp+"    "+FormatDateTime("yyyy-mm-dd  hh:mm:ss",datetime.CurrentDateTime()));
                                     }
                                }
                                else
                                {
                                    if(dtOld>dtNew)
                                      {
                                        CopyFile(strTemp.c_str(),tmpName.c_str(),FALSE);
                                        iNum++;
                                        txt_info->Lines->Add(IntToStr(iNum)+") "+strTemp+"    "+FormatDateTime("yyyy-mm-dd  hh:mm:ss",datetime.CurrentDateTime()));
                                      }
                                }
                                /*
                                CopyFile(strTemp.c_str(),tmpName.c_str(),FALSE);
                                iNum++;
                                txt_info->Lines->Add(IntToStr(iNum)+") "+strTemp+"    "+FormatDateTime("yyyy-mm-dd  hh:mm:ss",datetime.CurrentDateTime()));
                                */
                        }
                        else
                        {
                                CopyFile(strTemp.c_str(),anotherNewName.c_str(),FALSE);
                                iNum++;
                                txt_info->Lines->Add(IntToStr(iNum)+") "+strTemp+"    "+FormatDateTime("yyyy-mm-dd  hh:mm:ss",datetime.CurrentDateTime()));
                        }
                        /*
                        dtOld=FileDateToDateTime(FileAge(strTemp.c_str()));
                        dtNew=FileDateToDateTime(FileAge(tmpName.c_str()));
                        if(dtOld>dtNew)
                        {
                                CopyFile(strTemp.c_str(),tmpName.c_str(),FALSE);
                                iNum++;
                                txt_info->Lines->Add(IntToStr(iNum)+") "+strTemp+"    "+FormatDateTime("yyyy-mm-dd  hh:mm:ss",datetime.CurrentDateTime()));
                        }
                        */
                }
                else
                {
                        CopyFile(strTemp.c_str(),tmpName.c_str(),TRUE);
                        iNum++;
                        txt_info->Lines->Add(IntToStr(iNum)+") "+strTemp+"    "+FormatDateTime("yyyy-mm-dd  hh:mm:ss",datetime.CurrentDateTime()));
                 }
                FindClose(FileNew);
            }
        } while (FindNext(FileOld) == 0);
      FindClose(FileOld);
  }
}

Answer 6

http://blog.csdn.net/zhzuo/archive/2005/03/08/315125.aspx