从OpenFileDialog路径/文件名中提取路径

using System;
using System.Windows.Forms;

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

        private void button1_Click(object sender, EventArgs e)
        {
            using (OpenFileDialog openFileDialog = new OpenFileDialog())
            {
                if (openFileDialog.ShowDialog() == DialogResult.OK)
                {
                    string fileName = openFileDialog.FileName;
                    string filePath = System.IO.Path.GetDirectoryName(fileName);
                    MessageBox.Show("路径: " + filePath);
                }
            }
        }
    }
}