记事本

一、窗体设计

二、点击事件代码

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

        // 用于存储当前操作的文件的名称
        private string textFileName = "";
        private string filePath = "";
        private void 新建_Click(object sender, EventArgs e)
        {
            textFileName = "";
            // 新建一个文本时，若输入框中的内容不为空，应先提示“是否保存”
            if (inputInfo.Text != string.Empty)
            {
                // 若用户选择“是”，应弹出保存文件的对话框
                if (MessageBox.Show("是否保存当前文件？", "Mickey温馨提示", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Information)
                    == DialogResult.Yes)
                {
                    // 保存文件
                    Save();
                    Text = "新建-Mickey记事本";
                    inputInfo.Text = "";
                }
                else if (MessageBox.Show("是否保存当前文件？", "Mickey温馨提示", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Information)
                    == DialogResult.No)
                {
                    // 用户选择不保存时将输入框中的内容清除
                    inputInfo.Text = "";
                }
            }
        }
        private void 打开_Click(object sender, EventArgs e)
        {
            OpenFileDialog openFile = new OpenFileDialog();
            openFile.Filter = "文本文件(*.txt)|*.txt";
            if (openFile.ShowDialog() == DialogResult.OK)
            {
                StreamReader sr = new StreamReader(openFile.FileName);
                inputInfo.Text = sr.ReadToEnd();
                sr.Close();
                FileInfo fileInfo = new FileInfo(openFile.FileName);
                // 把标题改为打开的文件的名称
                Text = "*" + fileInfo.Name + "-Mickey记事本";
                textFileName = fileInfo.Name;
            }
        }

       
        private void 保存_Click(object sender, EventArgs e)
        {
            Save();
        }
        // “保存”
        private void Save()
        {
            if (!textFileName.Equals(""))
            {
                SaveFileDialog saveFile = new SaveFileDialog();
                // 默认保存格式
                saveFile.Filter = "文本文件(*.txt)|*.txt";
                StreamWriter sw = new StreamWriter(filePath, false);
                sw.Write(inputInfo.Text);
                sw.Close();

                MessageBox.Show("文件保存成功！", "Mickey温馨提示");
                filePath = saveFile.FileName;
                // 把标题改为打开的文件的名称
                Text = textFileName + "-Mickey记事本";
            }
            else
            {
                // 成员变量为“”，说明文件第一次保存，执行“另存为”操作
                HoldFile();
            }
        }

       
        private void HoldFile()
        {
            // 若用户选择另保存文件
            SaveFileDialog saveFile = new SaveFileDialog();
            // 默认保存格式
            saveFile.Filter = "文本文件(*.txt)|*.txt";
            if (saveFile.ShowDialog() == DialogResult.OK)
            {
                StreamWriter sw = new StreamWriter(saveFile.FileName, false);
                sw.WriteLine(inputInfo.Text);
                sw.Close();
                MessageBox.Show("文件保存成功！", "Mickey温馨提示");
                filePath = saveFile.FileName;
            }
            // 判断是第一次保存还是第二次
            if (textFileName.Equals(""))
            {
                FileInfo fileInfo = new FileInfo(saveFile.FileName);
                Text = fileInfo.Name + "-Mickey记事本";
                textFileName = fileInfo.Name;
            }
            else
            {
                // 把标题改为打开的文件的名称
                Text = textFileName + "-Mickey记事本";
            }
        }
       
        private void 另存为_Click(object sender, EventArgs e)
        {
            HoldFile();
        }
 
       
        private void 退出_Click(object sender, EventArgs e)
        {
            // 退出时应提示用户是否保存当前文本文件
            DialogResult result = MessageBox.Show("是否将更改保存？", "Mickey温馨提示", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Information);
            if (result == DialogResult.Yes)
            {
                Save();
                Application.Exit();
            }
            else if (result == DialogResult.No)
            {
                Application.Exit();
            }
        }
  
        // 这个成员变量用来存储用户选择进行操作的字符串
        private string selectedInfo = "";
       
        private void 编辑_Click(object sender, EventArgs e)
        {
            if ((inputInfo.SelectedText.Equals("")) && (selectedInfo.Equals("")))
            {
                剪切.Enabled = false;
                复制.Enabled = false;
                粘贴.Enabled = false;
                删除.Enabled = false;
            }
            else
            {
                剪切.Enabled = true;
                复制.Enabled = true;
                粘贴.Enabled = true;
                删除.Enabled = true;
            }
        }
       
        private void 撤销_Click(object sender, EventArgs e)
        {
            this.inputInfo.Undo();
        }
        private void 剪切_Click(object sender, EventArgs e)
        {
            selectedInfo = inputInfo.SelectedText;
            this.inputInfo.Cut();
        }
        private void 复制_Click(object sender, EventArgs e)
        {
            selectedInfo = inputInfo.SelectedText;
            this.inputInfo.Copy();
        }
        private void 粘贴_Click(object sender, EventArgs e)
        {
            this.inputInfo.Paste();
        }
        private void 删除_Click(object sender, EventArgs e)
        {
            this.inputInfo.SelectedText = "";
        }
 

       
        private void 查找_Click(object sender, EventArgs e)
        {
            if (inputInfo.Text == string.Empty)
            {
                MessageBox.Show("请确保要查找的文件的内容不为空！", "Mickey温馨提示");
            }
            else
            {
                //Form2 fr2 = new Form2();
                //fr2.sender(this);
                //fr2.Show();
            }
        }
        private void 查找下一个_Click(object sender, EventArgs e)
        {
        }
       
        private void 全选_Click(object sender, EventArgs e)
        {
            this.inputInfo.SelectAll();
            //全选_Click(sender,e);
        }
        private void 日期时间_Click(object sender, EventArgs e)
        {
            inputInfo.Text += "现在时间是:" + DateTime.Now.ToString();
        }
 

       
        private void 自动换行_Click(object sender, EventArgs e)
        {
            if (自动换行.Checked == true)
            {
                inputInfo.WordWrap = true;
            }
            else
            {
                inputInfo.WordWrap = false;
            }
        }

       
        private void 字体_Click(object sender, EventArgs e)
        {
            FontDialog fontDialog = new FontDialog();
            if (fontDialog.ShowDialog() == DialogResult.OK)
            {
                inputInfo.Font = fontDialog.Font;
            }
        }
 
       
        private void 查看_Click(object sender, EventArgs e)
        {
            if (inputInfo.Text.Length > 0)
            {
                状态栏.Enabled = true;
            }
            else
            {
                状态栏.Enabled = false;
            }
        }

        private void 状态栏_Click(object sender, EventArgs e)
        {
            if (状态栏.Checked == true)
            {
                状态栏.Checked = false;
                statusStrip1.Visible = false;
            }
            else
            {
                状态栏.Checked = true;
                statusStrip1.Visible = true;

            }

        }

        private void 工具栏_Click(object sender, EventArgs e)
        {
            if (工具栏.Checked == true)
            {
                工具栏.Checked = false;
                toolStrip1.Visible = false;
                inputInfo.Location = new Point(0, 24);
            }
            else
            {
                工具栏.Checked = true;
                toolStrip1.Visible = true;
                inputInfo.Location = new Point(0, 49);
            }

        }

        private void 查看帮助_Click(object sender, EventArgs e)
        {
            string help = @"C:\Users\狗狗Mickey\Desktop\help.txt";
            Help.ShowHelp(this, help);
        }


        private void 关于记事本_Click(object sender, EventArgs e)
        {
            Form about = new Form2();
            about.Show();
        }
        private void inputInfo_TextChanged(object sender, EventArgs e)
        {
            string num = inputInfo.TextLength.ToString();
            toolStripStatusLabel2.Text = num;

            if (inputInfo.Text != "")
            {
                撤销UToolStripMenuItem.Enabled = true;
                剪切TToolStripMenuItem.Enabled = true;
                复制CToolStripMenuItem.Enabled = true;
                删除DToolStripMenuItem.Enabled = true;
                全选AToolStripMenuItem.Enabled = true;
            }
            else
            {
                撤销UToolStripMenuItem.Enabled = false;
                剪切TToolStripMenuItem.Enabled = false;
                复制CToolStripMenuItem.Enabled = false;
                删除DToolStripMenuItem.Enabled = false;
                全选AToolStripMenuItem.Enabled = false;
            }

            //if (inputInfo.)
            //{
            //    粘贴PToolStripMenuItem.Enabled = true;
            //}
            
        }
        private void 撤销ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            this.inputInfo.Undo();
        }

        private void 剪切ToolStripMenuItem_Click(object sender, EventArgs e)
        {
                this.inputInfo.Cut();
                
        }

        private void 复制ToolStripMenuItem_Click(object sender, EventArgs e)
        {
                this.inputInfo.Copy();
        }
        private void 粘贴ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            this.inputInfo.Paste();
        }
        private void 删除ToolStripMenuItem_Click(object sender, EventArgs e)
        {
                this.inputInfo.SelectedText = "";
        }
        private void 全选ToolStripMenuItem_Click(object sender, EventArgs e)
        {
                this.inputInfo.SelectAll();
        }
    }