数値型に設定したセルに全角の文字列（IME変換時の文字）が表示されます。

ただし、確定時に入力はされません。

以下は、Edit_Began・Editor_Loaded・Text_Changedイベントで入力値をチェックする例です。

 

◎サンプルコード（VB）

Private Sub Edit_Began(sender As Object, e As C1.WPF.DataGrid.DataGridBeganEditEventArgs)
    If TypeOf e.EditingElement Is C1NumericBox Then
        Dim txtBox As C1NumericBox = CType(e.EditingElement, C1NumericBox)
        AddHandler txtBox.Loaded, AddressOf Editor_Loaded
    End If
End Sub

Private Sub Editor_Loaded(sender As Object, e As RoutedEventArgs)
    Dim txtBox As C1NumericBox = CType(sender, C1NumericBox)
    Dim temp = CType(txtBox.Template.FindName("Text", txtBox), C1TextBoxBase)
    AddHandler temp.TextChanged, AddressOf Text_Changed
End Sub

Private Sub Text_Changed(sender As Object, e As TextChangedEventArgs)
    Dim txtBox As C1TextBoxBase = CType(sender, C1TextBoxBase)
    Dim result As Double
    If (Double.TryParse(txtBox.Text, result)) = False Then
        txtBox.Text = "0"
    End If
End Sub