Winform OpenFileDialog打開(kāi)文件對(duì)話框

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

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

 /// <summary>
 /// 打開(kāi)文件按鈕單擊事件
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 private void btn_OpenFile_Click(object sender, EventArgs e)
 {
 //定義一個(gè)文件打開(kāi)控件
 OpenFileDialog ofd = new OpenFileDialog();
 //設(shè)置打開(kāi)對(duì)話框的初始目錄，默認(rèn)目錄為exe運(yùn)行文件所在的路徑
 ofd.InitialDirectory = Application.StartupPath;
 //設(shè)置打開(kāi)對(duì)話框的標(biāo)題
 ofd.Title = "請(qǐng)選擇要打開(kāi)的文件";
 //設(shè)置打開(kāi)對(duì)話框可以多選
 ofd.Multiselect = true;
 //設(shè)置對(duì)話框打開(kāi)的文件類(lèi)型
 ofd.Filter = "文本文件|*.txt|音頻文件|*.wav|圖片文件|*.jpg|所有文件|*.*";
 //設(shè)置文件對(duì)話框當(dāng)前選定的篩選器的索引
 ofd.FilterIndex = 2;
 //設(shè)置對(duì)話框是否記憶之前打開(kāi)的目錄
 ofd.RestoreDirectory = true;
 if (ofd.ShowDialog() == DialogResult.OK)
 { 
 //獲取用戶(hù)選擇的文件完整路徑
 string filePath = ofd.FileName;
 //獲取對(duì)話框中所選文件的文件名和擴(kuò)展名，文件名不包括路徑
 string fileName = ofd.SafeFileName; 
 OutLog("用戶(hù)選擇的文件目錄為:" + filePath);
 
 OutLog("用戶(hù)選擇的文件名稱(chēng)為:"+fileName);
 OutLog("**************選中文件的內(nèi)容**************");
 using (FileStream fsRead = new FileStream(filePath, FileMode.OpenOrCreate, FileAccess.Read))
 { 
 //定義二進(jìn)制數(shù)組
 byte[] buffer = new byte[1024 * 1024 * 5];
 //從流中讀取字節(jié)
 int r= fsRead.Read(buffer, 0, buffer.Length);
 OutLog(Encoding.Default.GetString(buffer,0,r));
 }
 }
 }

 /// <summary>
 ///