[C#]选择文件和文件夹

---

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();
        }


        //打开文件，并设置诸多属性
        private void SelectFile_Click(object sender, EventArgs e)
        {
            OpenFileDialog openFileDialog = new OpenFileDialog();

            //设置对话框标题
            openFileDialog.Title = "选择文件";
            //设置文件类型
            openFileDialog.Filter = "图片文件|*.jpg;*.png";
            //默认加载目录
            openFileDialog.InitialDirectory = @"D:\DownLoad\Image";
            //记忆之前打开的对话框
            openFileDialog.RestoreDirectory = true;
            //多选
            openFileDialog.Multiselect = true;

            if (openFileDialog.ShowDialog() == System.Windows.Forms.DialogResult.OK )
            {
                string fileName = openFileDialog.FileName;
            }

        }
        //最简单的打开文件
        private void SplitFile_Click(object sender, EventArgs e)
        {
            OpenFileDialog openFileDialog = new OpenFileDialog();
            if (openFileDialog.ShowDialog() ==  System.Windows.Forms.DialogResult.OK)
            {
                //获取选择的文件名
                string fileName = openFileDialog.FileName;
            }
        }

        //保存文件
        private void button1_Click(object sender, EventArgs e)
        {
            SaveFileDialog saveFileDialog = new SaveFileDialog();
            //设置对话框
            saveFileDialog.Title = "保存文件";
            //设置文件类型
            saveFileDialog.Filter = "图片文件|*.jpg;*.png";
            //设置默认扩展名
            saveFileDialog.DefaultExt = "png";
            //设置默认保存路径
            saveFileDialog.InitialDirectory = @"D:\DownLoad\Image";

            if (saveFileDialog.ShowDialog() ==  System.Windows.Forms.DialogResult.OK)
            {
                string pictureName = saveFileDialog.FileName;
                //照片另存
                string targetFilePath = @"C:\aaa.png";
                File.Copy(targetFilePath, pictureName);
            }

        }
        //选择文件夹并枚举文件
        private void button2_Click(object sender, EventArgs e)
        {
            FolderBrowserDialog folderBrowserDialog = new FolderBrowserDialog();
            folderBrowserDialog.Description = "选择文件夹";
            folderBrowserDialog.RootFolder = Environment.SpecialFolder.Desktop;
            folderBrowserDialog.ShowNewFolderButton = false;
            if (folderBrowserDialog.ShowDialog() == DialogResult.OK)
            {
                string folderPath = folderBrowserDialog.SelectedPath;
                string[] files = Directory.GetFiles(folderPath);
                foreach (string str in files)
                {
                    Console.WriteLine(str);
                }
            }

        }
    }
}