文件流

using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.IO; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Forms;

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

        PRivate void btnOpen1_Click(object sender, EventArgs e)         {             OpenFileDialog readOFD = new OpenFileDialog();             if (readOFD.ShowDialog() == DialogResult.OK)             {                 txtPath1.Text = readOFD.FileName;             }         }

        private void btnRead_Click(object sender, EventArgs e)         {             using (FileStream fs = new FileStream(txtPath1.Text, FileMode.Open))             {                 byte[] bytearry=new byte[1024*1024*4];                int length= fs.Read(bytearry,0,bytearry.Length);                if (length > 0)                {                    txtinputbox1.Text = Encoding.UTF8.GetString(bytearry);                }             }            

        }

        private void btnOpen2_Click(object sender, EventArgs e)         {             OpenFileDialog writOpneFileDialog = new OpenFileDialog();             if (writOpneFileDialog.ShowDialog() == DialogResult.OK)             {                 txtPath2.Text = writOpneFileDialog.FileName;             }         }

        private void btnWrite_Click(object sender, EventArgs e)         {             using (FileStream fs = new FileStream(txtPath2.Text, FileMode.Create))             {                 byte[] bytefile=Encoding.UTF8.GetBytes(textBox3.Text.Trim());                 fs.Write(bytefile,0,bytefile.Length);             }         }     } }