C# 記事本實作程式碼

編輯模組僅實現全選與時間兩個功能，自動換行功能尚未撰寫。

若需要完整原始碼請留言或發郵件至 henanlinzhoulcl@163.com

版本：1.0

主要程式碼如下：

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

namespace MyNotePad
{
    public partial class MyNotePad : Form
    {
        public MyNotePad()
        {
            InitializeComponent();
            this.toolStripStatusLabel3.Text = DateTime.Now.DayOfWeek.ToString();
        }

        private void 退出ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }

        private void 日期ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (this.textBox1.SelectedText != "")
                this.textBox1.SelectedText = DateTime.Now.ToString();
            else
                this.textBox1.Text += DateTime.Now;
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            this.toolStripStatusLabel1.Text = "現在時間是:" + DateTime.Now.ToString();
        }

        private void 狀態欄ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (this.statusStrip1.Visible == false)
                this.statusStrip1.Visible = true;
            else
            {
                this.statusStrip1.Visible = false;
                this.textBox1.Height += 10;
            }
        }

        private void 關於MyNotePadAToolStripMenuItem_Click(object sender, EventArgs e)
        {
            About ab = new About();
            ab.Show();
        }

        private void 全選ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            this.textBox1.SelectAll();
        }

        private void 字體ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (fontDialog1.ShowDialog() == DialogResult.OK)
                textBox1.Font = fontDialog1.Font;
        }

        private void MyNotePad_Resize(object sender, EventArgs e)
        {
            this.panel1.Width = this.Size.Width - 25;
            this.panel1.Height = this.Size.Height - 50;
            this.textBox1.Width = this.panel1.Width;
            this.textBox1.Height = this.panel1.Height;
        }

        private void 自動換行ToolStripMenuItem_Click(object sender, EventArgs e) { }

        private void 保存ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            using (SaveFileDialog saveDig = new SaveFileDialog())
            {
                saveDig.Filter = @"文本文檔(*.txt)|*.txt";
                saveDig.FileName = "*.txt";
                if (saveDig.ShowDialog() == DialogResult.OK)
                {
                    StreamWriter sw = new StreamWriter(saveDig.FileName, false, System.Text.Encoding.Default);
                    sw.Write(this.textBox1.Text);
                    sw.Close();
                    this.Text = saveDig.FileName;
                }
            }
        }

        private void 另存為ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            using (SaveFileDialog saveDig = new SaveFileDialog())
            {
                saveDig.Filter = @"文本文檔(*.txt)|*.txt";
                saveDig.FileName = this.Text;
                if (saveDig.ShowDialog() == DialogResult.OK)
                {
                    StreamWriter sw = new StreamWriter(saveDig.FileName, false, System.Text.Encoding.Default);
                    sw.Write(this.textBox1.Text);
                    sw.Close();
                }
            }
        }

        private void 新建ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (this.textBox1.Text != "")
            {
                DialogResult d = MessageBox.Show(
                    "文件 " + this.Text + @" 的文字已經改變。想保存文件嗎？",
                    "MyNotePad", MessageBoxButtons.YesNoCancel,
                    MessageBoxIcon.Information, MessageBoxDefaultButton.Button1,
                    MessageBoxOptions.DefaultDesktopOnly);

                switch (d)
                {
                    case DialogResult.Yes:
                        using (SaveFileDialog saveDig = new SaveFileDialog())
                        {
                            saveDig.Filter = @"文本文檔(*.txt)|*.txt";
                            saveDig.FileName = "*.txt";
                            if (saveDig.ShowDialog() == DialogResult.OK)
                            {
                                StreamWriter sw = new StreamWriter(saveDig.FileName, false, System.Text.Encoding.Default);
                                sw.Write(this.textBox1.Text);
                                sw.Close();
                                this.Text = saveDig.FileName;
                            }
                        }
                        break;
                    case DialogResult.No:
                        this.textBox1.Text = "";
                        break;
                    case DialogResult.Cancel:
                        break;
                    default: System.Diagnostics.Debug.Assert(false); break;
                }
            }
        }

        private void 打開ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (this.textBox1.Text != "")
            {
                DialogResult d = MessageBox.Show(
                    "文件 " + this.Text + @" 的文字已經改變。想保存文件嗎？",
                    "MyNotePad", MessageBoxButtons.YesNoCancel,
                    MessageBoxIcon.Information, MessageBoxDefaultButton.Button1,
                    MessageBoxOptions.DefaultDesktopOnly);

                switch (d)
                {
                    case DialogResult.Yes:
                        using (SaveFileDialog saveDig = new SaveFileDialog())
                        {
                            saveDig.Filter = @"文本文檔(*.txt)|*.txt";
                            saveDig.FileName = "*.txt";
                            if (saveDig.ShowDialog() == DialogResult.OK)
                            {
                                StreamWriter sw = new StreamWriter(saveDig.FileName, false, System.Text.Encoding.Default);
                                sw.Write(this.textBox1.Text);
                                sw.Close();
                                this.Text = saveDig.FileName;
                            }
                        }
                        break;
                    case DialogResult.No:
                        this.textBox1.Text = "";
                        break;
                    case DialogResult.Cancel:
                        break;
                    default: System.Diagnostics.Debug.Assert(false); break;
                }
            }
            else
            {
                using (OpenFileDialog dlgText = new OpenFileDialog())
                {
                    dlgText.Filter = @"(*.txt)|*.txt";
                    if (dlgText.ShowDialog() == DialogResult.OK)
                    {
                        if (File.Exists(dlgText.FileName))
                        {
                            StreamReader rStream = new StreamReader(dlgText.FileName, System.Text.Encoding.Default);
                            string s = default(string);
                            this.textBox1.Text = "";
                            while ((s = rStream.ReadLine()) != null)
                                this.textBox1.Text += s;
                            rStream.Close();
                        }
                    }
                }
            }
        }

        private void MyNotePad_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (this.textBox1.Text != "")
            {
                DialogResult d = MessageBox.Show(
                    "文件 " + this.Text + @" 的文字已經改變。想保存文件嗎？",
                    "MyNotePad", MessageBoxButtons.YesNoCancel,
                    MessageBoxIcon.Information, MessageBoxDefaultButton.Button1,
                    MessageBoxOptions.DefaultDesktopOnly);

                switch (d)
                {
                    case DialogResult.Yes:
                        using (SaveFileDialog saveDig = new SaveFileDialog())
                        {
                            saveDig.Filter = @"文本文檔(*.txt)|*.txt";
                            saveDig.FileName = "*.txt";
                            if (saveDig.ShowDialog() == DialogResult.OK)
                            {
                                StreamWriter sw = new StreamWriter(saveDig.FileName, false, System.Text.Encoding.Default);
                                sw.Write(this.textBox1.Text);
                                sw.Close();
                                this.Text = saveDig.FileName;
                            }
                        }
                        break;
                    case DialogResult.No:
                        break;
                    case DialogResult.Cancel:
                        break;
                    default: System.Diagnostics.Debug.Assert(false); break;
                }
            }
        }
    }
}

其他程式碼可省略。