using?System;
using?System.Collections.Generic;
using?System.ComponentModel;
using?System.Data;
using?System.Drawing;
using?System.Linq;
using?System.Text;
using?System.Windows.Forms;

namespace?WinFormAPP
{
????public?partial?class?Form1?:?Form
????{
????????public?Form1（）
????????{
????????????InitializeComponent（）;
????????????BindComboxItems（）;
????????????this.dataGridView1.EditingControlShowing?+=?new?DataGridViewEditingControlShowingEventHandler（EnabledComboBoxWrite）;
????????}
????????private?void?EnabledComboBoxWrite（object?sender?DataGridViewEditingControlShowingEventArgs?e）
????????{
????????????ComboBox?cb?=?e.Control?as?ComboBox;
????????????if?（cb?!=?null）
????????????{
????????????????cb.DropDownstyle?=?ComboBoxstyle.DropDown;
????????????????cb.Validating?+=?new?System.ComponentModel.CancelEventHandler（cb_Validating）;
????????????}

????????}

????????void?cb_Validating（object?sender?System.ComponentModel.CancelEventArgs?e）
????????{
????????????DataGridViewComboBoxEditingControl?cbo?=?（DataGridViewComboBoxEditingControl）sender;
????????????if?（cbo.Text.Trim（）?==?string.Empty）?return;

????????????DataGridView?grid?=?cbo.EditingControlDataGridView;
????????????object?value?=?cbo.Text;

????????????if?（cbo.Items.IndexOf（value）?==?-1）
????????????{
????????????????DataGridViewComboBoxColumn?cboCol?=?（DataGridViewComboBoxColumn）grid.Columns[grid.CurrentCell.ColumnIndex];
????????????????cbo.Items.Add（value）;
????????????????cboCol.Items.Add（value）;
????????????????grid.CurrentCell.Value?=?value;
????????????}
????????}
????????private?void?BindComboxItems（）
????????{
????????????DataGridViewComboBoxColumn?col?=?（DataGridViewComboBoxColumn）dataGridView1.Columns[0];
????????????col.Items.Add（““）;
????????????col.Items.Add（“aaa“）;
????????????col.Items.Add（“bbb“）;
????????????col.Items.Add（“ccc“）;
????????}
????}
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2013-12-13?13:19??WinFormAPP\
?????目錄???????????0??2013-12-13?13:20??WinFormAPP\WinFormAPP\
?????文件?????????872??2013-12-13?13:19??WinFormAPP\WinFormAPP.sln
?????文件???????18944??2013-12-24?16:35??WinFormAPP\WinFormAPP.suo
?????目錄???????????0??2013-12-13?13:19??WinFormAPP\WinFormAPP\bin\
?????目錄???????????0??2013-12-17?17:21??WinFormAPP\WinFormAPP\bin\Debug\
?????文件????????9728??2013-12-24?16:34??WinFormAPP\WinFormAPP\bin\Debug\WinFormAPP.exe
?????文件???????26112??2013-12-24?16:34??WinFormAPP\WinFormAPP\bin\Debug\WinFormAPP.pdb
?????文件???????11600??2013-12-24?16:35??WinFormAPP\WinFormAPP\bin\Debug\WinFormAPP.vshost.exe
?????文件?????????490??2010-03-17?22:39??WinFormAPP\WinFormAPP\bin\Debug\WinFormAPP.vshost.exe.manifest
?????文件????????1918??2013-12-24?16:34??WinFormAPP\WinFormAPP\Form1.cs
?????文件????????2788??2013-12-24?16:23??WinFormAPP\WinFormAPP\Form1.Designer.cs
?????文件????????6001??2013-12-24?16:23??WinFormAPP\WinFormAPP\Form1.resx
?????目錄???????????0??2013-12-13?13:19??WinFormAPP\WinFormAPP\obj\
?????目錄???????????0??2013-12-13?13:19??WinFormAPP\WinFormAPP\obj\x86\
?????目錄???????????0??2013-12-24?16:34??WinFormAPP\WinFormAPP\obj\x86\Debug\
?????文件????????4440??2013-12-17?17:20??WinFormAPP\WinFormAPP\obj\x86\Debug\DesignTimeResolveAssemblyReferences.cache
?????文件????????6323??2013-12-24?16:34??WinFormAPP\WinFormAPP\obj\x86\Debug\DesignTimeResolveAssemblyReferencesInput.cache
?????文件?????????352??2013-12-24?16:23??WinFormAPP\WinFormAPP\obj\x86\Debug\GenerateResource.read.1.tlog
?????文件?????????814??2013-12-24?16:23??WinFormAPP\WinFormAPP\obj\x86\Debug\GenerateResource.write.1.tlog
?????文件????????7897??2013-12-17?17:21??WinFormAPP\WinFormAPP\obj\x86\Debug\ResolveAssemblyReference.cache
?????目錄???????????0??2013-12-13?13:19??WinFormAPP\WinFormAPP\obj\x86\Debug\TempPE\
?????文件????????1021??2013-12-24?16:35??WinFormAPP\WinFormAPP\obj\x86\Debug\WinFormAPP.csproj.FileListAbsolute.txt
?????文件????????9728??2013-12-24?16:34??WinFormAPP\WinFormAPP\obj\x86\Debug\WinFormAPP.exe
?????文件?????????180??2013-12-24?16:23??WinFormAPP\WinFormAPP\obj\x86\Debug\WinFormAPP.Form1.resources
?????文件???????26112??2013-12-24?16:34??WinFormAPP\WinFormAPP\obj\x86\Debug\WinFormAPP.pdb
?????文件?????????180??2013-12-17?17:21??WinFormAPP\WinFormAPP\obj\x86\Debug\WinFormAPP.Properties.Resources.resources
?????文件?????????491??2013-12-13?13:19??WinFormAPP\WinFormAPP\Program.cs
?????目錄???????????0??2013-12-13?13:19??WinFormAPP\WinFormAPP\Properties\
?????文件????????1356??2013-12-13?13:19??WinFormAPP\WinFormAPP\Properties\AssemblyInfo.cs
?????文件????????2871??2013-12-13?13:19??WinFormAPP\WinFormAPP\Properties\Resources.Designer.cs
............此處省略4個文件信息