C# 文件的保存与读取

来源：互联网发布：酒店前台收银软件编辑：程序博客网时间：2024/05/24 03:16

1.保存文件到指定的textBox控件中

 StreamWriter sw = new StreamWriter( "D:\\1.txt");             sw.WriteLine(this.textBox1.Text);            sw.Flush();//文件流            sw.Close();//最后要关闭写入状态

2.文件另存为到用户指定的txt文件

 Stream myStream;             //新建另存为对话框            SaveFileDialog saveFileDialog1 = new SaveFileDialog();            //指定保存文件类型 这里为txt            saveFileDialog1.Filter = "txt files   (*.txt)|*.txt";            saveFileDialog1.FilterIndex = 2;            saveFileDialog1.RestoreDirectory = true;            if (saveFileDialog1.ShowDialog() == DialogResult.OK)            {                if ((myStream = saveFileDialog1.OpenFile()) != null)                {                    using (StreamWriter sw = new StreamWriter(myStream))                    {                        sw.WriteLine(this.textBox1.Text);                    }                    myStream.Close();                    MessageBox.Show("Saved");                }            }        }    }

3.读取txt文件到textBox中

textBox3.Text = File.ReadAllText(“D:\1.txt”);

4.读取指定的txt文件到指定的textBox中

这里写代码片

未完成DEMO

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Windows.Forms;using System.IO;namespace WindowsFormsApplication1{    public partial class Form1 : Form    {        public Form1()        {            InitializeComponent();        }        private void button1_Click(object sender, EventArgs e)        {            StreamWriter sw = new StreamWriter( "D:\\1.txt");            sw.WriteLine(this.textBox1.Text);            sw.Flush();//文件流            sw.Close();//最后要关闭写入状态        }        private void button3_Click(object sender, EventArgs e)        {           // StreamReader sd = File.OpenText("D:\\1.txt");           // sd.ReadToEnd("D:\\1.txt", System.Text.Encoding.UTF8);            textBox3.Text = File.ReadAllText("D:\\1.txt");        }        private void button4_Click(object sender, EventArgs e)        {            Stream myStream;            SaveFileDialog saveFileDialog1 = new SaveFileDialog();            saveFileDialog1.Filter = "txt files   (*.txt)|*.txt";            saveFileDialog1.FilterIndex = 2;            saveFileDialog1.RestoreDirectory = true;            if (saveFileDialog1.ShowDialog() == DialogResult.OK)            {                if ((myStream = saveFileDialog1.OpenFile()) != null)                {                    using (StreamWriter sw = new StreamWriter(myStream))                    {                        sw.WriteLine(this.textBox1.Text);                    }                    myStream.Close();                    MessageBox.Show("Saved");                }            }        }        private void button5_Click(object sender, EventArgs e)        {            string v_OpenFolderPath = @"目录路径"; System.Diagnostics.Process.Start("explorer.exe", v_OpenFolderPath);        }        private void button6_Click(object sender, EventArgs e)        {            Stream s;            OpenFileDialog op = new OpenFileDialog();            op.Filter = "txt files    (*.txt)|*.txt";            op.FilterIndex = 2;            op.RestoreDirectory = true;            if (op.ShowDialog() == DialogResult.OK) {                if ((s = op.OpenFile()) != null) {                        textBox3.Text = File.ReadAllText("");                }            }        }    }}

0 0