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;
using?System.IO;
namespace?文件讀寫TXT
{
????public?partial?class?Form1?:?Form
????{
????????public?Form1（）
????????{
????????????InitializeComponent（）;
????????}

????????private?void?button2_Click（object?sender?EventArgs?e）
????????{

????????????if?（richTextBox1.Text?==?““）
????????????{

????????????????MessageBox.Show（“您沒有，輸入任何文字，無意義！“）;
????????????}

????????????else
????????????{
??????????????
????????????????if?（openFileDialog1.ShowDialog（）?==?DialogResult.OK）
????????????????{


????????????????????//類型為追加寫入
????????????????????StreamWriter?sw?=?File.AppendText（openFileDialog1.FileName）;
????????????????????//開始寫入???
????????????????????textBox1.Text?=?openFileDialog1.FileName;
????????????????????textBox2.Text?=?System.IO.Path.GetFileName（textBox1.Text）;
????????????????????sw.WriteLine（richTextBox1.Text?System.Environment.NewLine?Encoding.GetEncoding（“gb2312“））;
????????????????????//清空緩沖區
????????????????????sw.Flush（）;
????????????????????sw.Close（）;
????????????????????MessageBox.Show（“文件寫入成功！“）;
????????????????????richTextBox1.Clear（）;
????????????????????//關閉流???????????
????????????????}
????????????}


????????}???

????????private?void?button1_Click_1（object?sender?EventArgs?e）
????????{


????????????openFileDialog1.Filter?=?“文本文件（*.txt）|*.txt“;
????????????if?（openFileDialog1.ShowDialog（）?==?DialogResult.OK）
????????????{
????????????????textBox1.Text?=?openFileDialog1.FileName;
????????????????//如果打開對話框打開了
????????????????StreamReader?r?=?new?StreamReader（openFileDialog1.FileName?Encoding.GetEncoding（“gb2312“））;
????????????????//實例化StreamReader對象
????????????????richTextBox1.Text?=?r.ReadToEnd（）;

????????????????textBox1.Text?=?openFileDialog1.FileName;
????????????????textBox2.Text?=?System.IO.Path.GetFileName（textBox1.Text）;
????????????????//使用ReadToEnd表示從當前位置一直讀到末尾
????????????????r.Close（）;
????????????????//關閉讀取流
????????????}


????????}
????}
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件????????184??2020-09-15?10:40??文件讀寫TXT\App.config

?????文件??????????3??2019-12-07?16:08??文件讀寫TXT\bin\Debug\.txt

?????文件?????????12??2019-12-09?09:54??文件讀寫TXT\bin\Debug\2313213212

?????文件?????????16??2019-12-09?09:56??文件讀寫TXT\bin\Debug\你好

?????文件??????11264??2020-09-15?10:40??文件讀寫TXT\bin\Debug\文件讀寫TXT.exe

?????文件????????184??2020-09-15?10:40??文件讀寫TXT\bin\Debug\文件讀寫TXT.exe.config

?????文件???????4096??2020-09-15?10:40??文件讀寫TXT\bin\Debug\文件讀寫TXT.pdb

?????文件??????24224??2020-09-15?11:06??文件讀寫TXT\bin\Debug\文件讀寫TXT.vshost.exe

?????文件????????184??2020-09-15?10:40??文件讀寫TXT\bin\Debug\文件讀寫TXT.vshost.exe.config

?????文件????????490??2014-09-19?01:53??文件讀寫TXT\bin\Debug\文件讀寫TXT.vshost.exe.manifest

?????文件???????2377??2019-12-20?18:17??文件讀寫TXT\Form1.cs

?????文件???????7108??2019-12-20?18:13??文件讀寫TXT\Form1.Designer.cs

?????文件???????6224??2019-12-20?18:13??文件讀寫TXT\Form1.resx

?????文件???????1464??2019-12-09?09:35??文件讀寫TXT\obj\Debug\DesignTimeResolveAssemblyReferences.cache

?????文件???????7167??2020-09-15?10:40??文件讀寫TXT\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache

?????文件??????????0??2019-12-07?15:15??文件讀寫TXT\obj\Debug\TemporaryGeneratedFile_036C0B5B-1481-4323-8D20-8F5ADCB23D92.cs

?????文件??????????0??2019-12-07?15:15??文件讀寫TXT\obj\Debug\TemporaryGeneratedFile_5937a670-0e60-4077-877b-f7221da3dda1.cs

?????文件??????????0??2019-12-07?15:15??文件讀寫TXT\obj\Debug\TemporaryGeneratedFile_E7A71F73-0F8D-4B9B-B56E-8E70B10BC5D3.cs

?????文件???????4608??2020-09-15?10:40??文件讀寫TXT\obj\Debug\TempPE\Properties.Resources.Designer.cs.dll

?????文件???????2817??2020-09-15?11:06??文件讀寫TXT\obj\Debug\文件讀寫TXT.csproj.FileListAbsolute.txt

?????文件????????904??2020-09-15?10:40??文件讀寫TXT\obj\Debug\文件讀寫TXT.csproj.GenerateResource.Cache

?????文件???????2361??2020-09-15?10:40??文件讀寫TXT\obj\Debug\文件讀寫TXT.csprojResolveAssemblyReference.cache

?????文件??????11264??2020-09-15?10:40??文件讀寫TXT\obj\Debug\文件讀寫TXT.exe

?????文件????????180??2020-09-15?10:40??文件讀寫TXT\obj\Debug\文件讀寫TXT.Form1.resources

?????文件??????28160??2020-09-15?10:40??文件讀寫TXT\obj\Debug\文件讀寫TXT.pdb

?????文件????????180??2020-09-15?10:40??文件讀寫TXT\obj\Debug\文件讀寫TXT.Properties.Resources.resources

?????文件????????527??2019-12-07?15:15??文件讀寫TXT\Program.cs

?????文件???????1356??2019-12-07?15:15??文件讀寫TXT\Properties\AssemblyInfo.cs

?????文件???????2870??2020-09-15?10:40??文件讀寫TXT\Properties\Resources.Designer.cs

?????文件???????5612??2019-12-07?15:15??文件讀寫TXT\Properties\Resources.resx

............此處省略14個文件信息