C#实验十三1234合集

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

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private string file;
        private void Form1_Load(object sender, EventArgs e)
        {

        }


        private void button1_Click_1(object sender, EventArgs e)
        {
            //读文件
            /*if (string.IsNullOrEmpty(this.textBox1.Text.Trim()))
            {
                MessageBox.Show("必须输入待读文件路径及文件名");
                return;
            }
            FileStream fs =
                new FileStream(this.textBox1.Text,
                    FileMode.OpenOrCreate, FileAccess.Read);
            byte[] bytes = new byte[fs.Length];
            fs.Read(bytes, 0, bytes.Length);
            this.textBox2.Text = Encoding.UTF8.GetString(bytes);
            fs.Dispose();*/
            if (string.IsNullOrEmpty(this.textBox1.Text.Trim()))
            {
                MessageBox.Show("必须输入待读文件路径及文件名");
                return;
            }
            StreamReader st = new StreamReader(textBox1.Text);
            textBox2.Text = st.ReadToEnd();
            st.Close();
        }

        private void button2_Click_1(object sender, EventArgs e)
        {
            //写文件
            if (string.IsNullOrEmpty(this.textBox1.Text.Trim()))
            {
                MessageBox.Show("必须输入待写文件路径及文件名");
                return;
            }
           /* FileStream fs =
                new FileStream(this.textBox1.Text,
                    FileMode.Create, FileAccess.Write);
            /*byte[] bytes = Encoding.UTF8.GetBytes(this.textBox2.Text.Trim());
            fs.Write(bytes, 0, bytes.Length);*/
            StreamWriter st = new StreamWriter(this.textBox1.Text);
            st.Write(textBox2.Text);
            st.Close();

        }

        private void button3_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrEmpty(file))
            {
                SaveFileDialog savedialog = new SaveFileDialog();
                savedialog.Filter = "*.txt|*.txt";
                savedialog.ShowDialog();
                file = savedialog.FileName;
                if (string.IsNullOrEmpty(file)) return;
            }
            StreamWriter sw =
            new StreamWriter(file, false, Encoding.GetEncoding("GB2312"));
            sw.Write(this.textBox1.Text);
            sw.Dispose();

        }

        private void button4_Click(object sender, EventArgs e)
        {
            Close();
        }

        private void button6_Click(object sender, EventArgs e)
        {
            openFileDialog1.Filter = "*.jpg|*.jpg";
            openFileDialog1.ShowDialog();
            file = openFileDialog1.FileName;
            if (string.IsNullOrEmpty(file)) return;
            this.pictureBox1.Image = Image.FromFile(file);
            this.pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;
            label3.Text = file;

        }

        private void button5_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrEmpty(file))
            {
                MessageBox.Show("先选图片再复制");
                return;

            }
            saveFileDialog1.Filter = "*.jpg|*.jpg";
            saveFileDialog1.ShowDialog();
            string saveFile = saveFileDialog1.FileName;
            if (string.IsNullOrEmpty(saveFile)) return;
            //读图片文件至字节数组b
            FileStream fs = new FileStream(file, FileMode.Open, FileAccess.Read);
            byte[] b = new byte[fs.Length];
            fs.Read(b, 0, b.Length);
            //开始复制
            fs = new FileStream(saveFile, FileMode.Create, FileAccess.Write);
            fs.Write(b, 0, b.Length);
            fs.Dispose();
            MessageBox.Show("Ok");

        }




    }
}