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Public Class Form1
Private Sub Form1_Load(sender As Object,e As EventArgs) Handles MyBase.Load
Try
Me.Cursor = Cursors.WaitCursor
DataGridView1.AutoGenerateColumns = False
Dim cmbInitData As DataTable = GetInitialComboBoxData()
' DataGridViewのコンボボックスの生成と初期化
CreateGridOfComboBoxAndInitial(DataGridView1,cmbInitData,"value","name",1)
' グリッドデータの初期化
Dim grdDataSource As DataTable = GetGridData()
DataGridView1.DataSource = grdDataSource
' DBのValueにより、コンボボックス選択項目の設定
SetGridCmbValueByDB(DataGridView1,grdDataSource,1,2)
Catch ex As Exception
MessageBox.Show(ex.Message.ToString())
Finally
Me.Cursor = Cursors.Default
End Try
End Sub
''' <summary>
''' グリッド初期化データの取得
''' </summary>
''' <returns></returns>
''' <remarks></remarks>
Private Function GetGridData() As DataTable
Dim conn As New ADODB.Connection
Dim constr As String
constr = ("Driver={SQL Server};server=xx-pcSQLEXPRESS;Uid=xx;Pwd=xxxx;Database=TestDB")
Dim Rec As New ADODB.Recordset
Dim recordTable As New DataTable
Dim ChangeDA As New OleDb.OleDbDataAdapter
Dim sql As String
conn.Open(constr)
sql = "select * from GVTest"
Rec.Open(sql,conn,ADODB.CursorTypeEnum.adOpenKeyset,ADODB.LockTypeEnum.adLockOptimistic)
ChangeDA.Fill(recordTable,Rec)
Rec.Close()
conn.Close()
Return recordTable
End Function
''' <summary>
''' グリッド内コンボボックス初期化データの取得
''' </summary>
''' <returns></returns>
''' <remarks></remarks>
Private Function GetInitialComboBoxData() As DataTable
Dim conn As New ADODB.Connection
Dim constr As String
Dim Rec As New ADODB.Recordset
Dim recordTable As New DataTable
Dim ChangeDA As New OleDb.OleDbDataAdapter
Dim sql As String
constr = ("Driver={SQL Server};server=xxx-pcSQLEXPRESS;Uid=xx;Pwd=xxxx;Database=TestDB")
conn.Open(constr)
sql = "select value,name from Dictionary order by sortid"
Rec.Open(sql,Rec)
Rec.Close()
conn.Close()
Return recordTable
End Function
''' <summary>
''' グリッドにコンボボックスの生成とデータ初期化
''' </summary>
''' <param name="grd"></param>
''' <param name="dataSource"></param>
''' <param name="valueField"></param>
''' <param name="display"></param>
''' <param name="cmbOfDispIndex"></param>
''' <remarks></remarks>
Private Sub CreateGridOfComboBoxAndInitial(ByVal grd As DataGridView,ByVal dataSource As DataTable,_
ByVal valueField As String,ByVal display As String,_
ByVal cmbOfDispIndex As Integer)
Dim cmbCol As New DataGridViewComboBoxColumn()
cmbCol.HeaderText = "comboxColumn"
cmbCol.ValueMember = valueField
cmbCol.DisplayMember = display
cmbCol.Name = "comboxColumn"
cmbCol.DataSource = dataSource
grd.Columns.Insert(cmbOfDispIndex,cmbCol)
' 表示形式の設定
cmbCol.DisplayStyleForCurrentCellOnly = True
cmbCol.DisplayStyle = DataGridViewComboBoxDisplayStyle.ComboBox
End Sub
''' <summary>
''' DBの値をグッリドのコンボボックスに設定
''' </summary>
''' <param name="grd"></param>
''' <param name="dataSource"></param>
''' <param name="cmbClmIndex"></param>
''' <param name="dbValueFieldIndex"></param>
''' <remarks></remarks>
Private Sub SetGridCmbValueByDB(ByVal grd As DataGridView,_
ByVal cmbClmIndex As Integer,ByVal dbValueFieldIndex As Integer)
For i As Integer = 0 To dataSource.Rows.Count - 1
grd.Rows(i).Cells(cmbClmIndex).Value = dataSource.Rows(i).Item(dbValueFieldIndex).ToString()
Next
End Sub
'CellEnterイベントハンドラ(下拉框单击一次打开)
Private Sub DataGridView1_CellEnter(ByVal sender As Object,_
ByVal e As DataGridViewCellEventArgs) _
Handles DataGridView1.CellEnter
Dim dgv As DataGridView = CType(sender,DataGridView)
If dgv.Columns(e.ColumnIndex).Name = "comboxColumn" AndAlso _
TypeOf dgv.Columns(e.ColumnIndex) Is DataGridViewComboBoxColumn Then
SendKeys.Send("{F4}")
End If
End Sub
Private dataGridViewComboBox As DataGridViewComboBoxEditingControl = Nothing
''' <summary>
''' EditingControlShowingイベントハンドラ
''' </summary>
''' <remarks></remarks>
Private Sub DataGridView1_EditingControlShowing(ByVal sender As Object,_
ByVal e As DataGridViewEditingControlShowingEventArgs) _
Handles DataGridView1.EditingControlShowing
'表示されているコントロールがDataGridViewComboBoxEditingControlか調べる
If TypeOf e.Control Is DataGridViewComboBoxEditingControl Then
Dim dgv As DataGridView = CType(sender,DataGridView)
'該当する列か調べる
If dgv.CurrentCell.OwningColumn.Name = "comboxColumn" Then
'編集のために表示されているコントロールを取得
Me.dataGridViewComboBox = _
CType(e.Control,DataGridViewComboBoxEditingControl)
'SelectedIndexChangedイベントハンドラを追加
AddHandler Me.dataGridViewComboBox.SelectedIndexChanged,_
AddressOf dataGridViewComboBox_SelectedIndexChanged
End If
End If
End Sub
''' <summary>
''' CellEndEditイベントハンドラ
''' </summary>
''' <remarks></remarks>
Private Sub DataGridView1_CellEndEdit(ByVal sender As Object,_
ByVal e As DataGridViewCellEventArgs) _
Handles DataGridView1.CellEndEdit
'SelectedIndexChangedイベントハンドラを削除
If Not (Me.dataGridViewComboBox Is Nothing) Then
RemoveHandler Me.dataGridViewComboBox.SelectedIndexChanged,_
AddressOf dataGridViewComboBox_SelectedIndexChanged
Me.dataGridViewComboBox = Nothing
End If
End Sub
''' <summary>
''' SelectedIndexChangedイベントハンドラ
''' </summary>
''' <remarks>DataGridViewに表示されているコンボボックスのValueMemberとDisplayMemberを取得する</remarks>
Private Sub dataGridViewComboBox_SelectedIndexChanged(ByVal sender As Object,_
ByVal e As EventArgs)
'選択されたアイテムを表示
Dim cb As DataGridViewComboBoxEditingControl = _
CType(sender,DataGridViewComboBoxEditingControl)
' 編集中のValueMemberを取得する（DataGridView1.CurrentRow.Cells(1).Value.ToString()エラーが出る重要）
MessageBox.Show(cb.SelectedValue)
' 編集中のDisplayMemberを取得する（EditedFormattedValue重要）
MessageBox.Show(DataGridView1.CurrentRow.Cells("comboxColumn").EditedFormattedValue)
End Sub
''' <summary>
''' グリッド内コンボボックスセル値の取得
''' </summary>
''' <remarks></remarks>
Private Sub Button1_Click(sender As Object,e As EventArgs) Handles Button1.Click
Try
Me.Cursor = Cursors.WaitCursor
' 編集後のValueMemberを取得する
MessageBox.Show(DataGridView1.CurrentRow.Cells(1).Value.ToString())
' 編集後のDisplayMemberを取得する
MessageBox.Show(DataGridView1.CurrentRow.Cells("comboxColumn").FormattedValue.ToString()) Catch ex As Exception MessageBox.Show(ex.Message.ToString()) Finally Me.Cursor = Cursors.Default End Try End Sub End Class
（编辑：李大同）
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