【C#源代码】记事本的新建、打开、保存等功能

来源：互联网发布：gta5薛之谦捏脸数据编辑：程序博客网时间：2024/05/04 02:00
对照电脑自带的记事本，来进行窗体设计和功能的添加，在主窗体的基础上，只需额外添加查找、转到、替换三个窗体。以下是部分功能的源代码：
//新建        private void 新建ToolStripMenuItem_Click(object sender, EventArgs e)        {                        if (richTextBox1.Text != "")            {                if (bIsSave == false) //没有保存                {                    DialogResult result = MessageBox.Show("文件 无标题 的文字已改变。\n\n想保存文件吗？", "记事本", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Warning);                    if (result == DialogResult.Yes)                    {                        saveFileDialog1.FileName = "*.txt";                        saveFileDialog1.Filter = "文本文档(*.txt)|*.txt";                        saveFileDialog1.Title = "保存";                        if (saveFileDialog1.ShowDialog() == DialogResult.OK)                        {                            richTextBox1.SaveFile(saveFileDialog1.FileName, RichTextBoxStreamType.PlainText);                            filename = saveFileDialog1.FileName;                            this.Text = "无标题 - 记事本";                            richTextBox1.Clear();                        }                    }                    if (result == DialogResult.No)                    {                        richTextBox1.Clear();                    }                }                else                 {                    richTextBox1.Clear();                }            }        }  //复制private void 复制CCtrlCToolStripMenuItem_Click(object sender, EventArgs e)        {              // richTextBox1.Copy();                 this.Cursor = Cursors.WaitCursor;                 string strTemp = richTextBox1.SelectedText;   //获取RichTextBox中选中的文字                 if (strTemp.Equals(""))     //Equals 方法确定两个对象是否相等                     return;                   Clipboard.Clear();//清除原有剪切板中内容                   Clipboard.SetText(strTemp);//将文字添加到剪切板中，还添加Object类型数据                                this.Cursor = Cursors.Default;                }   //打开        private void 打开OCtrlOToolStripMenuItem_Click(object sender, EventArgs e)        {            openFileDialog1.FileName = "*.txt";            openFileDialog1.Filter = "文本文档(*.txt)|*.txt|所有文件|*.*";            if (openFileDialog1.ShowDialog() == DialogResult.OK)            {                StreamReader sr = new StreamReader(openFileDialog1.FileName, Encoding.Default);                richTextBox1.Text = sr.ReadToEnd();                sr.Close();            }            filename = openFileDialog1.FileName;            this.Text = Path.GetFileName(openFileDialog1.FileName)+" - 记事本";            bIsSave = true;        }   //保存        private void 保存SCtrlSToolStripMenuItem_Click(object sender, EventArgs e)        {                        if (filename == "")            {                bIsSave = false;                saveFileDialog1.FileName = "*.txt";                saveFileDialog1.Filter = "文本文档(*.txt)|*.txt";                saveFileDialog1.Title = "保存";                if (saveFileDialog1.ShowDialog() == DialogResult.OK)                {                    richTextBox1.SaveFile(saveFileDialog1.FileName, RichTextBoxStreamType.PlainText);                    filename = saveFileDialog1.FileName;                    this.Text = "无标题 - 记事本";                    richTextBox1.Clear();                }                else                {                    richTextBox1.SaveFile(filename , RichTextBoxStreamType.PlainText);                }            }            bIsSave = true;        }   //时间日期        private void 时间日期ToolStripMenuItem_Click(object sender, EventArgs e)        {            //System.DateTime currentTime = new System.DateTime();            string Time;            Time = (System.DateTime.Now).ToString ();            richTextBox1.Text = Time;        }  //全选        private void 全选AToolStripMenuItem_Click(object sender, EventArgs e)        {            richTextBox1.Focus();//设置定位到当前活动的RichTextBox,否则它不能正确执行             richTextBox1.SelectAll();        }
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