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?WindowsFormsApplication2
{
????public?partial?class?Form1?:?Form
????{
????????int?findPosition?=?0;
????????string?s_filename?=?““;
????????//bool?bsave?=?false;
????????

????????public?Form1（）
????????{
????????????
????????????InitializeComponent（）;
????????????IsMdiContainer?=?true;
????????????menuStrip1.MdiWindowListItem.Name?=?menuStrip1.Name;
????????}

????????private?void?Form1_Load（object?sender?EventArgs?e）
????????{

????????}
????????private?void?Form1_FormClosing（object?sender?FormClosingEventArgs?e）
????????{
????????????if?（!ifsaveoldfile（））?e.Cancel?=?true;
????????}

????????private?void?numericUpDown1_ValueChanged（object?sender?EventArgs?e）
????????{

????????}

????????private?void?ddToolStripMenuItem_Click（object?sender?EventArgs?e）
????????{

????????}

????????private?void?剪切ToolStripMenuItem_Click（object?sender?EventArgs?e）
????????{
????????????FormChild?formChild?=?（FormChild）this.ActiveMdiChild;
????????????formChild.richTextBox1.Cut（）;
????????}

????????private?void?復(fù)制ToolStripMenuItem_Click（object?sender?EventArgs?e）
????????{
????????????FormChild?formChild?=?（FormChild）this.ActiveMdiChild;
????????????formChild.richTextBox1.Copy（）;
????????}

????????private?void?粘貼ToolStripMenuItem_Click（object?sender?EventArgs?e）
????????{
????????????FormChild?formChild?=?（FormChild）this.ActiveMdiChild;
????????????formChild.richTextBox1.Paste（）;
????????}
????????
????????public?bool?ifsaveoldfile（）
????????{
????????????FormChild?formChild?=?（FormChild）this.ActiveMdiChild;
????????????bool?returnvalue?=?true;
????????????if?（formChild.bsave）
????????????{
????????????????System.Windows.Forms.DialogResult?dr;
????????????????dr?=?MessageBox.Show（this?“要保存當(dāng)前更改嗎?““保存更改嗎?“MessageBoxButtons.YesNoCancelMessageBoxIcon.Question）;
????????????????switch?（dr）
????????????????{
????????????????????case?System.Windows.Forms.DialogResult.Yes:
????????????????????????formChild.bsave?=?false;
????????????????????????if?（s_filename.Length?!=?0）?formChild.richTextBox1.SaveFile（s_filename?RichTextBoxStreamType.PlainText）;
????????????????????????else
????????????????????????{
????????????????????????????SaveFileDialog?saveFiledia1?=?new?SaveFileDialog（）;
????????????????????????????if?（saveFileDialog1.ShowDialog（）?==?DialogResult.OK）
????????????????????????????{
????????????????????????????????s_filename?=?saveFileDialog1.FileName;
????????????????????????????????formChild.richTextBox1.SaveFile（s_filename?RichTextBoxStreamType.PlainText）;
????????????????????????????}
????????????????????????}
????????????????????????returnvalue?=?true;
????????????????????????break;
????????????????????case?System.Windows.Forms.DialogRes

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2018-05-14?09:10??WindowsFormsApplication2\
?????目錄???????????0??2018-05-14?09:10??WindowsFormsApplication2\.vs\
?????目錄???????????0??2018-05-14?09:10??WindowsFormsApplication2\.vs\WindowsFormsApplication2\
?????目錄???????????0??2018-05-14?09:11??WindowsFormsApplication2\.vs\WindowsFormsApplication2\v14\
?????文件???????37376??2018-05-14?16:46??WindowsFormsApplication2\.vs\WindowsFormsApplication2\v14\.suo
?????目錄???????????0??2018-05-14?16:32??WindowsFormsApplication2\WindowsFormsApplication2\
?????文件?????????189??2018-05-14?09:10??WindowsFormsApplication2\WindowsFormsApplication2\App.config
?????文件???????16767??2018-05-14?15:45??WindowsFormsApplication2\WindowsFormsApplication2\Form1.Designer.cs
?????文件????????8807??2018-05-14?16:30??WindowsFormsApplication2\WindowsFormsApplication2\Form1.cs
?????文件????????6824??2018-05-14?15:45??WindowsFormsApplication2\WindowsFormsApplication2\Form1.resx
?????文件????????2223??2018-05-14?15:49??WindowsFormsApplication2\WindowsFormsApplication2\FormChild.Designer.cs
?????文件?????????712??2018-05-14?16:32??WindowsFormsApplication2\WindowsFormsApplication2\FormChild.cs
?????文件????????5817??2018-05-14?15:49??WindowsFormsApplication2\WindowsFormsApplication2\FormChild.resx
?????文件?????????547??2018-05-14?09:10??WindowsFormsApplication2\WindowsFormsApplication2\Program.cs
?????目錄???????????0??2018-05-14?09:10??WindowsFormsApplication2\WindowsFormsApplication2\Properties\
?????文件????????1490??2018-05-14?09:10??WindowsFormsApplication2\WindowsFormsApplication2\Properties\AssemblyInfo.cs
?????文件????????2878??2018-05-14?09:10??WindowsFormsApplication2\WindowsFormsApplication2\Properties\Resources.Designer.cs
?????文件????????5612??2018-05-14?09:10??WindowsFormsApplication2\WindowsFormsApplication2\Properties\Resources.resx
?????文件????????1111??2018-05-14?09:10??WindowsFormsApplication2\WindowsFormsApplication2\Properties\Settings.Designer.cs
?????文件?????????249??2018-05-14?09:10??WindowsFormsApplication2\WindowsFormsApplication2\Properties\Settings.settings
?????文件????????4624??2018-05-14?15:17??WindowsFormsApplication2\WindowsFormsApplication2\WindowsFormsApplication2.csproj
?????目錄???????????0??2018-05-14?14:34??WindowsFormsApplication2\WindowsFormsApplication2\bin\
?????目錄???????????0??2018-05-14?09:20??WindowsFormsApplication2\WindowsFormsApplication2\bin\Debug\
?????文件???????19968??2018-05-14?16:32??WindowsFormsApplication2\WindowsFormsApplication2\bin\Debug\WindowsFormsApplication2.exe
?????文件?????????189??2018-05-14?09:10??WindowsFormsApplication2\WindowsFormsApplication2\bin\Debug\WindowsFormsApplication2.exe.config
?????文件???????40448??2018-05-14?16:32??WindowsFormsApplication2\WindowsFormsApplication2\bin\Debug\WindowsFormsApplication2.pdb
?????文件???????22696??2018-05-14?09:11??WindowsFormsApplication2\WindowsFormsApplication2\bin\Debug\WindowsFormsApplication2.vshost.exe
?????文件?????????189??2018-05-14?09:10??WindowsFormsApplication2\WindowsFormsApplication2\bin\Debug\WindowsFormsApplication2.vshost.exe.config
?????文件?????????490??2017-09-29?21:43??WindowsFormsApplication2\WindowsFormsApplication2\bin\Debug\WindowsFormsApplication2.vshost.exe.manifest
?????文件???????40448??2018-05-14?16:32??WindowsFormsApplication2\WindowsFormsApplication2\obj\Debug\WindowsFormsApplication2.pdb
?????文件????????5194??2018-05-14?14:55??WindowsFormsApplication2\WindowsFormsApplication2\formFindReplace.Designer.cs
............此處省略20個文件信息