用C#.net一个简单的记事本
用到的控件有RichTextBox(有格式文本框控件),Menutrip(菜单控件),toolStrip(工具栏控件),statusStrip(状态栏控件),timer(计时器控件).
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 WindowsFormsApp12
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
string filename; //设置全局变量，后面用来存储文件的路径
bool saveflag = true; //设置一个用于判断的标志
private void mnufile_new_Click(object sender, EventArgs e)//新建按钮
{
if (saveflag == true) //判断是否执行了保存操作
{
if (richTextBox1.Modified)
{
if (MessageBox.Show(“内容已经修改,是否保存?”, “警告”, MessageBoxButtons.OKCancel, MessageBoxIcon.Warning) == DialogResult.OK)
mnufile_save_Click(sender, e);
}
}
richTextBox1.Clear(); //将richtext中的文本清空
}
private void mnufile_open_Click(object sender, EventArgs e)
{
OpenFileDialog OpenFileDialog = new OpenFileDialog();//openfiledialog用于创建标准对话框，提示用户打开文件
OpenFileDialog.Filter = "文本文件|*.txt|word文档|*.doc";//确定打开文件的类型
if (OpenFileDialog.ShowDialog() == DialogResult.OK)
{
filename = OpenFileDialog.FileName;
StreamReader sr = new StreamReader(filename, Encoding.GetEncoding("GB2312"));//Encoding表示对文件的打开格式的限定
richTextBox1.Text = sr.ReadToEnd();//ReadToEnd（）表示读取从当前位置到结尾的所有字符
sr.Close();
}
}
private void mnufile_save_Click(object sender, EventArgs e)//文件的保存
{
if (filename == null) //如果路径为null，则执行另存方法
{
mnufile_saveas_Click(sender, e);
}
string result = richTextBox1.Text.ToString();
if (result == "" || result.Length == 0)
{
MessageBox.Show("保存文本为空", "警告");
}
else
{
FileStream fs = new FileStream(filename, FileMode.OpenOrCreate, FileAccess.Write);
StreamWriter Sw = new StreamWriter(fs, Encoding.GetEncoding("GB2312"));//通过指定字符编码方式可以实现对汉字的支持，否则在用记事本打开查看会出现乱码
Sw.Write(result);
Sw.Flush();
Sw.Close();
Console.Beep();
MessageBox.Show("保存成功！", "通知");
}
saveflag = false;
}
private void mnufile_saveas_Click(object sender, EventArgs e)
{
SaveFileDialog saveFileDialog = new SaveFileDialog();
saveFileDialog.Title = "请选择要保存的路径";//设置保存文件对话框的标题
saveFileDialog.Filter = "文本文件|*.txt|word文件|*.doc|所有文件|*.*";//设置保存的格式
if (saveFileDialog.ShowDialog() == DialogResult.OK)
{
string result = richTextBox1.Text;
filename = saveFileDialog.FileName;
StreamWriter Sw = new StreamWriter(filename);
Sw.Write(result);
Sw.Flush();
Sw.Close();
}
}
private void mnufile_exit_Click(object sender, EventArgs e)
{
this.Close(); //关闭form
}
private void mnuedit_undo_Click(object sender, EventArgs e)
{
if (richTextBox1.CanUndo)
richTextBox1.Undo(); //撤销上一步的操作
}
private void mnuedit_copy_Click(object sender, EventArgs e)
{
richTextBox1.Copy(); //复制选中的内容
}
private void mnuedit_cut_Click(object sender, EventArgs e)
{
richTextBox1.Cut(); //剪切选中的内容
}
private void mnuedit_paste_Click(object sender, EventArgs e)
{
richTextBox1.Paste(); //粘贴在剪切板中的内容
}
private void mnuedit_clear_Click(object sender, EventArgs e)
{
richTextBox1.Clear(); //将richtext中的所有文本清空
}
private void mnuview_tool_Click(object sender, EventArgs e)
{
toolStrip1.Visible = true; //设置工具栏可见
}
private void mnuview_stat_Click(object sender, EventArgs e)
{
statusStrip1.Visible = true;
}
private void mnu_font_Click(object sender, EventArgs e)
{
FontDialog font = new FontDialog(); //设置字体
font.ShowColor = true;
font.Color = richTextBox1.SelectionColor;
font.Font = richTextBox1.SelectionFont;
if (font.ShowDialog() == DialogResult.OK)
{
richTextBox1.SelectionFont = font.Font;
richTextBox1.SelectionColor = font.Color;
}
}
private void mnu_wordwrap_Click(object sender, EventArgs e)
{
mnu_wordwrap.Checked = richTextBox1.WordWrap;
}
private void mnuform_color_Click(object sender, EventArgs e)
{
ColorDialog color = new ColorDialog(); //设置字体的颜色
color.AllowFullOpen = true;
color.AnyColor = true;
color.Color = richTextBox1.SelectionColor;
if (color.ShowDialog() == DialogResult.OK)
richTextBox1.SelectionColor = color.Color;
}
private void Form1_AutoSizeChanged(object sender, EventArgs e)
{
MessageBox.Show("你在修改窗体的大小！"); //修改窗口大小是进行提示
}
private void toolStripMenuItem1_Click(object sender, EventArgs e)
{
richTextBox1.Copy();
}
private void toolStripMenuItem2_Click(object sender, EventArgs e)
{
richTextBox1.Paste();
}
private void toolStripMenuItem3_Click(object sender, EventArgs e)
{
richTextBox1.Cut();
}
private void toolStripMenuItem4_Click(object sender, EventArgs e)
{
this.Close();
}
private void timer1_Tick(object sender, EventArgs e)
{
statu2.Text = DateTime.Now.ToString();
}
private void Form1_Load(object sender, EventArgs e)
{
}
private void openbutton_Click(object sender, EventArgs e)
{
mnufile_open_Click(sender, e);
}
private void copybutton_Click(object sender, EventArgs e)
{
mnuedit_copy_Click(sender, e);
}
private void cutbutton_Click(object sender, EventArgs e)
{
mnuedit_cut_Click(sender, e);
}
private void savebutton_Click(object sender, EventArgs e)
{
mnufile_save_Click(sender, e);
}
private void newbutton_Click(object sender, EventArgs e)
{
mnufile_new_Click(sender, e);
}
private void Form1_FormClosed(object sender, FormClosedEventArgs e)
{
if (richTextBox1.Modified)
{
if (MessageBox.Show("文件还没有保存，是否退出", "警告", MessageBoxButtons.OKCancel) == DialogResult.Cancel) //退出程序时进行警告
MessageBox.Show("老夫无能为力了!");
}
}
}
}