如何在winforms应用程序中获取文件路径

using System;
using System.Windows.Forms;

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

        private void button1_Click(object sender, EventArgs e)
        {
            OpenFileDialog openFileDialog = new OpenFileDialog();
            if (openFileDialog.ShowDialog() == DialogResult.OK)
            {
                string filePath = openFileDialog.FileName;
                MessageBox.Show(filePath);
            }
        }
    }
}

using System;
using System.Windows.Forms;

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

        private void button1_Click(object sender, EventArgs e)
        {
            SaveFileDialog saveFileDialog = new SaveFileDialog();
            if (saveFileDialog.ShowDialog() == DialogResult.OK)
            {
                string filePath = saveFileDialog.FileName;
                MessageBox.Show(filePath);
            }
        }
    }
}

using System;
using System.Windows.Forms;

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

        private void button1_Click(object sender, EventArgs e)
        {
            FolderBrowserDialog folderBrowserDialog = new FolderBrowserDialog();
            if (folderBrowserDialog.ShowDialog() == DialogResult.OK)
            {
                string folderPath = folderBrowserDialog.SelectedPath;
                MessageBox.Show(folderPath);
            }
        }
    }
}

using System;
using System.IO;
using System.Windows.Forms;

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

        private void button1_Click(object sender, EventArgs e)
        {
            string folderPath = @"C:\example";
            FileSystemWatcher fileSystemWatcher = new FileSystemWatcher(folderPath);
            fileSystemWatcher.Created += FileSystemWatcher_Created;
            fileSystemWatcher.EnableRaisingEvents = true;
        }

        private void FileSystemWatcher_Created(object sender, FileSystemEventArgs e)
        {
            MessageBox.Show($"文件已创建：{e.FullPath}");
        }
    }
}