Winform 选择文件、文件夹、打开指定目录的方法

using System;
using System.Windows.Forms;

namespace WindowsFormsApp1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        /// <summary>
        /// 选择文件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button1_Click(object sender, EventArgs e)
        {
            OpenFileDialog openFileDialog1 = new OpenFileDialog();
            openFileDialog1.Multiselect = true;
            openFileDialog1.Title = "请选择文件";
            openFileDialog1.Filter = "所有文件(*.*)|*.*";
            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                string filename = openFileDialog1.FileName;
                MessageBox.Show("已选择文件:" + filename, "选择文件提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
        }

        /// <summary>
        /// 选择文件夹、路径
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button2_Click(object sender, EventArgs e)
        {
            FolderBrowserDialog folderBrowserDialog1 = new FolderBrowserDialog();
            folderBrowserDialog1.Description = "请选择文件路径";
            if (folderBrowserDialog1.ShowDialog() == DialogResult.OK)
            {
                string path = folderBrowserDialog1.SelectedPath;
                MessageBox.Show("已选择文件夹:" + path, "选择文件夹提示", MessageBoxButtons.OK, MessageBoxIcon.Information);
            }
        }

        /// <summary>
        /// 打开目录
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void button3_Click(object sender, EventArgs e)
        {
            System.Diagnostics.Process.Start("Explorer.exe", "C:\\Windows");
        }
    }
}