C#访问文件

Question

using System.IO //读写文件需要的再看你具体读什么文件了,如果是xml,那么还需要using System.Xml

Answer 1

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 WindowsAppTest
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }        private void button1_Click(object sender, EventArgs e)
        {
            StreamWriter sw;
            if (!File.Exists(@"c:\Test1.txt"))
            {
                sw = File.CreateText(@"c:\Test1.txt");
                sw.WriteLine("-----------------------------------------------------------------");
                sw.WriteLine(this.textBox1.Text);
                sw.WriteLine(this.textBox2.Text);
                sw.WriteLine(System.DateTime.Now);
                sw.Close();
            }
            else
            {
                sw = File.AppendText(@"c:\Test1.txt");
                sw.WriteLine("-----------------------------------------------------------------");
                sw.WriteLine(this.textBox1.Text);
                sw.WriteLine(this.textBox2.Text);
                sw.WriteLine(System.DateTime.Now);
                sw.Close();
            }
            this.button1.Text = "OK";
        }
    }
}应该很容易看懂,不做说明了.希望能够抛砖引玉:)

Answer 2

要引用的就是USING SYSTEM.IO;红色字体标明的

Answer 3

如果仅仅是打开, 可以用string path = "test.txt";
System.Diagnostics.Process.Start(path);string appPath = "C:\\Windows\\Notepad.exe";
System.Diagnostics.Process.Start(appPath);