前言

WinForm使用C#语言做一个简单的记事本，满足加载、保存文件，编辑文本、修改文本字体和颜色功能。

一、运行使用效果

二、界面设计

• menuscript控件
• ToolScriptMenuItem
• RichTextBox

msMain、tsmiFile、tsmiOpen、tsmiOpenFile、tsmiOpenDirectory、tsmiSave、tsmiEdit、tsmiBackColor、tsmiFont、tsmiAbout、rtbEditor

三、代码

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;

namespace NotePadForm
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            openFileDialog1.Filter = "文本文件(*.txt)|*.txt|富文本文件(*.rtf)|*.rtf";
            
            saveFileDialog1.Title = "另存为";
            saveFileDialog1.Filter = "文本文件(*.txt)|*.txt|富文本文件(*.rtf)|*.rtf";
        }

        //打开文件
        private void tsmiOpenFile_Click(object sender, EventArgs e)
        {
            if (openFileDialog1.ShowDialog() == DialogResult.OK)
            {
                try
                {
                    string fileName = openFileDialog1.FileName;
                    if (fileName.EndsWith(".txt", true, null))
                    {
                        rtbEditor.LoadFile(fileName, RichTextBoxStreamType.PlainText);
                    }
                    else
                    {
                        rtbEditor.LoadFile(fileName, RichTextBoxStreamType.RichText);
                    }
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }
            }
        }

        //打开文件夹
        private void tsmiOpenDirectory_Click(object sender, EventArgs e)
        {
            if (folderBrowserDialog1.ShowDialog() == DialogResult.OK)
            {
                try
                {
                    openFileDialog1.InitialDirectory = folderBrowserDialog1.SelectedPath;
                    saveFileDialog1.InitialDirectory = folderBrowserDialog1.SelectedPath;
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }
            }
        }

        //保存文件
        private void tsmiSave_Click(object sender, EventArgs e)
        {
            if (saveFileDialog1.ShowDialog() == DialogResult.OK)
            {
                try
                {
                    if (saveFileDialog1.FileName.EndsWith("", true, null))
                    {
                        rtbEditor.SaveFile(saveFileDialog1.FileName, RichTextBoxStreamType.PlainText);
                    }
                    else
                    {
                        rtbEditor.SaveFile(saveFileDialog1.FileName, RichTextBoxStreamType.RichText);
                    }
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                } 
            }
        }

        //设置背景颜色
        private void tsmiBackColor_Click(object sender, EventArgs e)
        {
            colorDialog1.Color = rtbEditor.SelectionBackColor;
            if (colorDialog1.ShowDialog() == DialogResult.OK)
            {
                try
                {
                    rtbEditor.SelectionBackColor = colorDialog1.Color;
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.Message);
                }
            }
        }

        //更改字体
        private void tsmiFont_Click(object sender, EventArgs e)
        {
            fontDialog1.Font = rtbEditor.SelectionFont;
            fontDialog1.Color = rtbEditor.SelectionColor;
            if (fontDialog1.ShowDialog() == DialogResult.OK)
            {
                rtbEditor.SelectionFont = fontDialog1.Font;
                rtbEditor.SelectionColor = fontDialog1.Color;
            }
        }

        private void tsmiAbout_Click(object sender, EventArgs e)
        {
            AboutForm about = new AboutForm();
            about.ShowDialog();
        }

        private void tsmiEdit_DropDownOpening(object sender, EventArgs e)
        {
            if (rtbEditor.SelectionLength == 0)
            {
                tsmiBackColor.Enabled = false;
                tsmiFont.Enabled = false;
            }
            else
            {
                tsmiBackColor.Enabled = true;
                tsmiFont.Enabled = true;
            }
        }
    }
}

总结

WinForm做的一个简单版本记事本。