using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Threading;
using System.IO;///
///DebugLZQ
///http://www.cnblogs.com/DebugLZQ
///LINQ to Object & 线程操作
namespace 文件查找与分组
{public partial class Form1 : Form{public Form1(){InitializeComponent();}private string filePath = "";/
        //a4//得到选定目录下的文件类型private string[] GetFileTypes(){string[] files = Directory.GetFiles(filePath, "*.*", SearchOption.AllDirectories);//获得目录下所有的文件//LINQ获得文件分组var filesLookup = files.ToLookup(f=>f.Substring(f.LastIndexOf('.')).ToUpper());//从分组中获得Key(即文件类型),并排序var fileTypes = from t in filesLookuporderby t.Keyselect t.Key;return fileTypes.ToArray();}////b6//根据指定类型获得文件名private string[] GetFilesByType(string type){string[] files = Directory.GetFiles(filePath, "*.*", SearchOption.AllDirectories);//获得目录下所有的文件var filesByType = from f in fileswhere f.Contains(type.ToLower())||f.Contains(type)select f;return filesByType.ToArray();}////c8//查找文件private string[] FindFile(string str){string[] files = Directory.GetFiles(filePath, "*.*", SearchOption.AllDirectories);//获得目录下所有的文件var filesTake = from f in fileswhere f.Contains(str)select f;return filesTake.ToArray();}//////a2//访问磁盘，读取文件private void LoadFile(){Thread t = new Thread(new ThreadStart(loadfile));t.Start();           }private delegate void loadfileDelegate();//a3private void loadfile(){if (this.InvokeRequired == true)//注意这里
            {loadfileDelegate lfd = new loadfileDelegate(loadfile);this.Invoke(lfd);return;}//获得文件类型string[] fileTypes = GetFileTypes();//BindingfileTypeLst.DataSource = fileTypes;}//a1private void btnSelDir_Click(object sender, EventArgs e){if (folderBrowserDialog1.ShowDialog()== System.Windows.Forms.DialogResult.OK ){filePath = folderBrowserDialog1.SelectedPath;txtFolder.Text = folderBrowserDialog1.SelectedPath;LoadFile();}}//b5private void fileTypeLst_SelectedIndexChanged(object sender, EventArgs e){//根据文件类型获得文件名string[] files = GetFilesByType(fileTypeLst.SelectedItem.ToString());//BindingfileLst.DataSource = files;}//c7private void txtFind_TextChanged(object sender, EventArgs e){if (txtFind.Text.Length == 0){return;}string[] files = FindFile(txtFind.Text);//BindingfileLst.DataSource = files;}}
}