The following code shows how you can obtain the text representation of the currently edited cell value.
using DevExpress.XtraGrid.Views.Base;
ColumnView view = gridControl1.FocusedView as ColumnView;
string editingValue = null;
if (view != null && view.IsEditing)
editingValue = view.EditingValue.ToString();
Imports DevExpress.XtraGrid.Views.Base
Dim view As ColumnView = CType(GridControl1.FocusedView, ColumnView)
Dim editingValue As String = Nothing
If view IsNot Nothing And view.IsEditing Then
editingValue = view.EditingValue.ToString()
End If