實(shí)驗(yàn)報(bào)告第12次作業(yè)代碼

1、第一題：using System;using System.Collections.Generic; using System.Linq;using System.Text;using System.Threading.Tasks; using System.IO;namespace L15_1class Programsic void Main(string args)Console.Wriine(請輸入文件名：);string filename = Console.ReadLine(); if (filename.Length = 0)Console.Wrireturn;ine(請輸入?yún)?shù)

2、！);if (!File.Exists(filename)Console.Wriine(文件不存在); return;elseStreamReader sr = File.OpenText(filename); trysr = File.OpenText(filename); while (!sr.EndOfStream)for (i = 0; i Console.WindowHeight - 1; i+)if (sr.EndOfStream) break;Console.Wriine(sr.ReadLine();if (sr.EndOfStream) break;Console.Wriine

3、(按Ctrl+Break鍵中斷，按其他任意鍵繼續(xù));Console.ReadKey(true);catchConsole.Wrifinallysr.Close();ine(錯(cuò)誤：指定的文件不存在!);第二題：using System;using System.Collections.Generic;usingponentM;using System.Data; using System.Drawing;using System.Linq;using System.Text;using System.Threading.Tasks; using System.Windows.Forms; usi

4、ng System.IO;namespace L15_2public partial class Form1 : Formpublic Form1()ponent();private void button1_Click(objecder, EventArgs e)OpenFileDialog dlg1 = new OpenFileDialog(); dlg1.Filter = 文本文件(*.txt)|*.txt;if (dlg1.ShowDialog() = DialogResult.OK)StreamReader sr;if (radioButton1.Checked = true)sr

5、= new StreamReader(dlg1.FileName, System.Text.Encoding.ASCII); else if (radioButton2.Checked = true)sr = new StreamReader(dlg1.FileName, System.Text.Encoding.Unicode); else if (radioButton3.Checked = true)sr = new StreamReader(dlg1.FileName, System.Text.Encoding.UTF7); else if (radioButton4.Checked

6、= true)sr = new StreamReader(dlg1.FileName, System.Text.Encoding.UTF8); elsesr = new StreamReader(dlg1.FileName, System.Text.Encoding.Default);richTextBox1.Text = sr.ReadToEnd();sr.Close();private void button2_Click(objecder, EventArgs e)SaveFileDialog dlg1 = new SaveFileDialog(); dlg1.Filter = 文本文件(*.txt)|*.txt;if (dlg1.ShowDialog() = DialogResult.OK)StreamWriter sw = File.CreateText(dlg1.FileName);