C#读取指定目录下所有文件

根据网上资料整理而得，本来还可以读出所有目录的名字，但是考虑到文件名中包含完整文件路径，故意义不大，就不用读出目录名功能。

主要功能：

    1.读取指定目录下含子目录中所有文件。

    2.计算文件大小

    3.文件含完整路径

    4.列表显示到ListBox控件

    5.列表写入指定Txt文本文件。



源代码：

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.IO;
using System.Collections;

public partial class _Default : System.Web.UI.Page 
{

    string path = @"\\192.168.1.88\movie\音乐综艺";    //目录名 也可以用相当路径
    string filter = "*.*";        //文件类型
    int m_numFiles = 0;        //文件总数
    ArrayList m_pathList = new ArrayList();//包含所有文件路径的数组
    string[] files;            //所有文件名


    protected void Page_Load(object sender, EventArgs e)
    {

    }
    
    private string[] CreatePathList()
    {
        if (m_numFiles <= 0)
        {
            return null;
        }

        string[] str = new string[m_numFiles];
        int index = 0;

        try
        {
            IEnumerator pathIter = m_pathList.GetEnumerator();
            while (pathIter.MoveNext())
            {
                string[] ar = (string[])(pathIter.Current);
                IEnumerator fileIter = ar.GetEnumerator();
                while (fileIter.MoveNext())
                {
                    str[index] = (string)(fileIter.Current);
                    ++index;
                }
            }
        }
        catch (Exception e)
        {
            Console.Write(e.ToString());
            return null;
        }

        return str;

    }

    private void ParseDirectory(string path, string p)
    {
        string[] dirs = Directory.GetDirectories(path);//得到子目录
        IEnumerator iter = dirs.GetEnumerator();
        while (iter.MoveNext())
        {
            string str = (string)(iter.Current);
            ParseDirectory(str, filter);
        }
        string[] files = Directory.GetFiles(path, filter);
        if (files.Length > 0)
        {
            foreach (string filename in files)
            {
                
                FileInfo inf=new FileInfo(filename);
                float value = inf.Length / 1024 /1024;
                m_numFiles += files.Length;
                m_pathList.Add(files);
                ListBox1.Items.Add(filename);
                ListBox1.Items.Add("文件大小:"+value.ToString()+"M");
            }
        }

    }
    
    protected void BtGetFileList_Click(object sender, EventArgs e)
    {
        ParseDirectory(path, "*.*");
        files = CreatePathList();        //生成文件名数组
        //ListBox1.Items.Add(files.ToString());
        if (files == null)
        {
            throw new Exception(String.Concat("No file found in ", path));
        }
    }
    protected void BtInsrtTxt_Click(object sender, EventArgs e)
    {
        if (File.Exists("c:\\test.txt") == true)
        {
            try
            {
                //label2.Text = "OK";
                //File.Delete("c:\\test.txt");
                //File.Create("test.txt");
                StreamWriter sw = new StreamWriter("c:\\test.txt", true);
                for (int i = 0; i < ListBox1.Items.Count; i++)
                {
                    //写入TXT文件                     
                    sw.Write(ListBox1.Items[i].ToString() + "\r\n");
                }
                sw.Close();


            }
            catch (Exception err)
            {
                Console.WriteLine(err.ToString());
            }
        }
        else
        {
            //label2.Text = "error";
        }
    }
}