记事本程序
Anchor：控件与容器周围的距离保持不变
Dock：定义容器要停靠到哪一边，重要的一个是Fill填充
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 简单记事本
{
public partial class Form1 : Form
{
private bool IsSave = false;
string fileName = null;
public Form1()
{
InitializeComponent();
this.Text = "无标题-猫的记事本";
}
private void 新建NToolStripMenuItem_Click(object sender, EventArgs e)
{
if (IsSave == true)
{
DialogResult re = MessageBox.Show("是否将更改保存到 " + this.Text.Substring(0, this.Text.Length - 6) + "?", "询问", MessageBoxButtons.YesNoCancel);
if (re == DialogResult.Yes)
{
SaveFile();
}
else if(re == DialogResult.Cancel)
{
return;//什么也不做，直接返回
}
}
txtText.Text = "";
fileName = "";
this.Text = "无标题-猫的记事本";
}
private void toolStripMenuItem1_Click(object sender, EventArgs e)
{
//打开文件
OpenFileDialog ofd = new OpenFileDialog();
ofd.Title = "打开文件";
ofd.Filter = "文本文件|*.txt|所有文件|*.*";
//读取文件步骤：
//1. 声明文件流，即在内存申请一个空间，让文件和这个空间建立联系
//2. 创建读写器，用来操作文件流对象
//3. 读操作
//4. 释放读取器
//5. 释放文件流对象
if(ofd.ShowDialog() == DialogResult.OK)
{
//一打开指定文件，则立刻修改标题为文件名
fileName = ofd.FileName;
// 只显示文件名，不显示文件路径
this.Text = fileName.Substring(fileName.IndexOf("\\") + 1) + "-猫的记事本";
//1 声明文件流
// 1文件路径，2，3打开-读取，4打开文件后，其他进程对此文件的操作
FileStream fs = new FileStream(ofd.FileName, FileMode.Open,FileAccess.Read,FileShare.Read);
//fs创建了与文件相连的通道，而sr可用来操纵fs，进行文件的读取
//2 创建读写器
//StreamReader形参类型是Stream类，故可以接受其子类FileStream
//StreamReader(fst)英文可以正常,汉字不能正常时,为编码问题,添加编码方式
StreamReader sr = new StreamReader(fs,Encoding.Default);
//3 读取
//sr.ReadLine();//读取一行
//sr.ReadToEnd();//读取到最后
//sr.EndOfStream;
while(sr.EndOfStream == false)
{
string line = sr.ReadLine() + "\r\n";
txtText.Text += line;
}
//或者一次性读完
//txtText.Text = sr.ReadToEnd();
//4 关闭
sr.Close();
fs.Close();
IsSave = false;
}
}
private void 保存SToolStripMenuItem_Click(object sender, EventArgs e)
{
SaveFile();
}
private void 退出EToolStripMenuItem_Click(object sender, EventArgs e)
{
this.Close();
}
private void SaveFile()
{
//写入文件步骤：
//1. 声明文件流，即在内存申请一个空间，让文件和这个空间建立联系
//2. 创建写入器，用来操作文件流对象
//3. 写操作
//4. 释放写入器
//5. 释放文件流对象
if(fileName == null || fileName == "")
{
SaveFileDialog sfd = new SaveFileDialog();
sfd.Title = "保存文件";
sfd.Filter = "文本文件|*.txt|所有文件|*.*";
if (sfd.ShowDialog() == DialogResult.OK)
{
fileName = sfd.FileName;
this.Text = fileName.Substring(fileName.IndexOf("\\") + 1) + "-猫的记事本";
}
else
{
MessageBox.Show("文件打开失败！");
return;
}
}
FileStream fs = new FileStream(fileName, FileMode.Create);
StreamWriter sw = new StreamWriter(fs, Encoding.Default);
sw.Write(txtText.Text);
//sw写磁盘文件时，先写内存的fs，只有将 fs填满或者执行了sw关闭才将fs中内容写入磁盘
sw.Close();
fs.Close();
IsSave = false;
}
private void txtText_TextChanged(object sender, EventArgs e)
{
IsSave = true;
}
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
if (IsSave == true)
{
DialogResult re = MessageBox.Show("是否将更改保存到 "+this.Text.Substring(0,this.Text.Length - 6)+"?", "询问", MessageBoxButtons.YesNoCancel);
if (re == DialogResult.Yes)
{
SaveFile();
}
else if (re == DialogResult.No)
{
}
else
{
e.Cancel = true;
}
IsSave = false;
}
}
private void 复制ToolStripMenuItem_Click(object sender, EventArgs e)
{
txtText.Copy();
}
private void 剪切ToolStripMenuItem_Click(object sender, EventArgs e)
{
txtText.Cut();
}
private void 粘贴ToolStripMenuItem_Click(object sender, EventArgs e)
{
txtText.Paste();
}
private void 查找ToolStripMenuItem_Click(object sender, EventArgs e)
{
int currPos = txtText.SelectionStart;//选中的当前位置
int findPos = txtText.Text.IndexOf("aa", currPos);
if(findPos != -1)
{
txtText.Select(findPos, 2);
}
}
private void 字体ToolStripMenuItem_Click(object sender, EventArgs e)
{
FontDialog fd = new FontDialog();
fd.Font = txtText.Font;
if(fd.ShowDialog() == DialogResult.OK)
{
txtText.Font = fd.Font;
}
}
private void 字体颜色ToolStripMenuItem_Click(object sender, EventArgs e)
{
ColorDialog cd = new ColorDialog();
cd.Color = txtText.ForeColor;
if(cd.ShowDialog() == DialogResult.OK)
{
txtText.ForeColor = cd.Color;
}
}
private void 背景颜色ToolStripMenuItem_Click(object sender, EventArgs e)
{
ColorDialog cd = new ColorDialog();
cd.Color = txtText.BackColor;
if (cd.ShowDialog() == DialogResult.OK)
{
txtText.BackColor = cd.Color;
}
}
private void Form1_FormClosed(object sender, FormClosedEventArgs e)
{
//关闭后创建配置文件，记录文档的位置信息
int x = this.Location.X;
int y = this.Location.Y;
int w = this.Size.Width;
int h = this.Size.Height;
//此时自动创建文件流对象
StreamWriter sw = new StreamWriter(Application.StartupPath + "\\app.dll", false);
sw.WriteLine(x.ToString());
sw.WriteLine(y.ToString());
sw.WriteLine(w.ToString());
sw.WriteLine(h.ToString());
sw.Close();
}
private void Form1_Load(object sender, EventArgs e)
{
//是否有配置文件，如果有则读取
string appPath = Application.StartupPath + "\\app.dll";
if(File.Exists(appPath))
{
StreamReader sr = new StreamReader(appPath);
int x = Convert.ToInt32(sr.ReadLine());
int y = Convert.ToInt32(sr.ReadLine());
int w = Convert.ToInt32(sr.ReadLine());
int h = Convert.ToInt32(sr.ReadLine());
this.Location = new Point(x, y);
this.Size = new Size(w, h);
sr.Close();
}
}
}
}
