查找扩展名与文件类型不符合

 

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.IO;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void btnPath_Click(object sender, EventArgs e)
        {
            if (folderBrowserDialog1.ShowDialog() == DialogResult.OK)
            {
                txtPath.Text = folderBrowserDialog1.SelectedPath;
                string P = lblPath.Text;
                IsTrue(txtPath.Text);
               
            }
        }

        private void IsTrue(string p)
        {   
            DirectoryInfo dinfo = new DirectoryInfo(p);
            FileSystemInfo[] fsinfos = dinfo.GetFileSystemInfos();
            foreach (FileSystemInfo fsinfo in fsinfos)
            {
                if (fsinfo is DirectoryInfo)
                {   
                    IsTrue(fsinfo.FullName);
                }
                else
                {
                    if (IsName(fsinfo.FullName))
                    {
                        FileInfo finfo = new FileInfo(fsinfo.Name);
                        listView1.Items.Add(fsinfo.Name);
                        listView1.Items[listView1.Items.Count - 1].SubItems.Add(System.IO.Path.GetExtension(finfo.FullName));
                        listView1.Items[listView1.Items.Count - 1].SubItems.Add(finfo.FullName);
                        listView1.Items[listView1.Items.Count - 1].SubItems.Add(finfo.GetType().ToString());
                    }

                }
            }    
        }
        private bool IsName(string path)
        {
            bool xx = false;
            System.IO.FileStream fs = new System.IO.FileStream(path, System.IO.FileMode.Open, System.IO.FileAccess.Read);
            System.IO.BinaryReader r = new System.IO.BinaryReader(fs);
            string bx = "";
            byte buffer;
            try
            {
                buffer = r.ReadByte();
                bx = buffer.ToString();
                buffer = r.ReadByte();
                bx += buffer.ToString();

            }
            catch (Exception exc)
            {
                Console.WriteLine(exc.Message);
            }
            r.Close();
            fs.Close();
            //txt.Text += bx+"||||";
            if (System.IO.Path.GetExtension(path).ToLower() == ".exe")//7790:exe,8297:rar,8075:pk 
            {
                if (bx == "7790")
                { xx = true; }
            }
            //Console.WriteLine(bx);

            return xx; 
            
        }

    }
}