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The Data Grid View class provides a convenient way to perform validation before data is committed to the data store.You can validate data by handling the Cell Validating event, which is raised by the Data Grid View when the current cell changes. Leave If is Editing Then Set Column Value At Row(cm Source, m Row Num, Column Combo Box. Private Sub Form1_Load(By Val sender As Object, By Val e _ As System. Column Started Editing(Direct Cast(sender, Control)) End Sub Private Sub Leave Combo Box(By Val sender As Object, By Val e As Event Args) _ Handles Column Combo Box. Wnd Proc(m) End If End Sub /// This is a sample how to use it \\Sample to use the simple datagrid combobox it needs a form with a datagrid. Hide() End Sub Protected Overrides Function Get Column Value At Row(By Val source As System. Get Column Value At Row(source, row Num)) Return str Values(int Value) End Function End Class Public Class No Key Up Combo Inherits Combo Box Protected Overrides Sub Wnd Proc(By Ref m As System. New() Column Combo Box = New No Key Up Combo Add Handler Column Combo Box.

Add(ts) End Sub Be aware this tip is for the Windows Forms Data Grid, not for the Data Grid View To validate the text entered into a datagrid add a handler to the Datagrid Textbox Column's validating event. Dim ds As New Data Set Private Sub Form1_Load(By Val sender As System. Fill(ds, "Products") Dim ts As New Data Grid Table Style ts. Hide() End Sub End Class Public Class No Key Up Combo Inherits Combo Box Protected Overrides Sub Wnd Proc(By Ref m As System. Text) is Editing = False Invalidate() End If Column Combo Box. Edit(source, row Num, bounds, read Only1, instant Text, cell Is Visible) m Row Num = row Num cm Source = source Column Combo Box. Selection Change Committed, _ New Event Handler(Address Of Combo Start Editing) End Sub Protected Overloads Overrides Sub Edit(By Val source As Currency Manager, _ By Val row Num As Integer, By Val bounds As Rectangle, By Val read Only1 As Boolean, _ By Val instant Text As String, By Val cell Is Visible As Boolean) My Base.

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If the key pressed is Enter, I call End Edit(), otherwise I call base. It works great, except the Cell Validating event isn't fired. Column Index = 1 Then Dim i Row As Integer = My Base.

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