I've created a custom DataGridComboBoxColumn which works fine. I've filled it's list using a BindingSorce. The DataGridView are also uses another BindingSorce. All works fine except when user focus on combo, it shows the first item and when leave the combo, it shows the actual item. How do I solve this problem ?
Heres my code for examine. Thanks in advance.
Class DVG_ComboBoxControl
Inherits ComboBox
Implements IDataGridViewEditingControl
Private dataGridViewControl As DataGridView = Nothing
Private valueIsChanged As Boolean = False
Private rowIndexNum As Integer = 0
Public Sub New()
MyBase.New()
AddHandler Me.SelectedIndexChanged, AddressOf ComboBoxControl_SelectedIndexChanged
End Sub
Public Sub ComboBoxControl_SelectedIndexChanged(ByVal sender As Object, ByVal e As EventArgs)
Me.NotifyDataGridViewOfValueChange()
End Sub
Protected Overridable Sub NotifyDataGridViewOfValueChange()
Me.valueIsChanged = True
If Me.dataGridViewControl IsNot Nothing Then
Me.dataGridViewControl.NotifyCurrentCellDirty(True)
End If
End Sub
Protected Overrides Sub OnKeyDown(ByVal e As System.Windows.Forms.KeyEventArgs)
If e.KeyCode = Keys.Enter Then
SendKeys.Send("{TAB}")
End If
MyBase.OnKeyDown(e)
End Sub
#Region "IDataGridViewEditingControl"
Public Property EditingControlFormattedValue() As Object Implements IDataGridViewEditingControl.EditingControlFormattedValue
Get
Return Me.Text
End Get
Set(ByVal value As Object)
If TypeOf value Is String Then
Me.Text = DirectCast(value, String)
End If
End Set
End Property
Public Function GetEditingControlFormattedValue(ByVal context As DataGridViewDataErrorContexts) As Object Implements IDataGridViewEditingControl.GetEditingControlFormattedValue
Return EditingControlFormattedValue
End Function
Public Sub ApplyCellStyleToEditingControl(ByVal dataGridViewCellStyle As DataGridViewCellStyle) Implements IDataGridViewEditingControl.ApplyCellStyleToEditingControl
Me.Font = dataGridViewCellStyle.Font
End Sub
Public Property EditingControlRowIndex() As Integer Implements IDataGridViewEditingControl.EditingControlRowIndex
Get
Return rowIndexNum
End Get
Set(ByVal value As Integer)
rowIndexNum = value
End Set
End Property
Public Function EditingControlWantsInputKey(ByVal key As Keys, ByVal dataGridViewWantsInputKey As Boolean) As Boolean Implements IDataGridViewEditingControl.EditingControlWantsInputKey
Select Case key And Keys.KeyCode
Case Keys.Left, Keys.Up, Keys.Down, Keys.Right, Keys.Home, Keys.[End], _
Keys.PageDown, Keys.PageUp, Keys.[Return]
Return True
Case Else
Return False
End Select
End Function
Public Sub PrepareEditingControlForEdit(ByVal selectAll As Boolean) Implements IDataGridViewEditingControl.PrepareEditingControlForEdit
End Sub
Public ReadOnly Property RepositionEditingControlOnValueChange() As Boolean Implements IDataGridViewEditingControl.RepositionEditingControlOnValueChange
Get
Return False
End Get
End Property
Public Property EditingControlDataGridView() As DataGridView Implements IDataGridViewEditingControl.EditingControlDataGridView
Get
Return dataGridViewControl
End Get
Set(ByVal value As DataGridView)
dataGridViewControl = value
End Set
End Property
Public Property EditingControlValueChanged() As Boolean Implements IDataGridViewEditingControl.EditingControlValueChanged
Get
Return valueIsChanged
End Get
Set(ByVal value As Boolean)
valueIsChanged = value
End Set
End Property
Public ReadOnly Property EditingPanelCursor() As Cursor Implements IDataGridViewEditingControl.EditingPanelCursor
Get
Return MyBase.Cursor
End Get
End Property
#End Region '-- IDataGridViewEditingControl
End Class
Public Class ComboBoxAdvColumn
Inherits DataGridViewComboBoxColumn
Public Sub New()
Me.CellTemplate = New ComboBoxAdvCell()
End Sub
End Class
Public Class ComboBoxAdvCell
Inherits DataGridViewComboBoxCell
Public Sub New()
End Sub
Public Overrides Sub InitializeEditingControl(ByVal rowIndex As Integer, ByVal initialFormattedValue As Object, ByVal dataGridViewCellStyle As System.Windows.Forms.DataGridViewCellStyle)
MyBase.InitializeEditingControl(rowIndex, initialFormattedValue, dataGridViewCellStyle)
Dim ctl As DVG_ComboBoxControl = TryCast(DataGridView.EditingControl, DVG_ComboBoxControl)
If ctl IsNot Nothing Then
ctl.SelectedIndex = 0
End If
End Sub
Public Overrides ReadOnly Property EditType() As Type
Get
Return GetType(DVG_ComboBoxControl)
End Get
End Property
End Class