c#获取文件路径

 

Code
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.IO;
namespace 获取文件路径
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private string filepath;

        private void 打开ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            openFileDialog1.FileName = "*.txt";
            openFileDialog1.Filter = "接线图(*.txt)|*.txt";
            openFileDialog1.RestoreDirectory = true;
            openFileDialog1.FilterIndex = 1;
            //openFileDialog1.ShowDialog();
            if (this.openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                FileStream fs = new FileStream(openFileDialog1.FileName, FileMode.Open, FileAccess.Read);
                FileInfo info = new FileInfo(openFileDialog1.FileName);
                filepath = info.ToString ();
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            StreamReader sr;
            string s;
            try
            {
                sr = File.OpenText(filepath);
                s = sr.ReadToEnd();
                richTextBox1.Text = s.ToString();
                sr.Close();
            }
            catch(Exception ex)
            {
                MessageBox.Show("文件不存在");
            }
        }

        private void panel1_Paint(object sender, PaintEventArgs e)
        {
            if(filepath !="")
            {
                MessageBox .Show ("buweikong");
            }
        }

    }
}