How to post values to underlying data properties immediately after changing a cell value in DXGrid

To post values immediately, subscribe to the CellValueChanging event and call the View.PostEditor method.

If you don't want to handle events, check the E4155 - How to make GridControl immediately save changes in a cell after editing example demonstrating how to create a custom helper that does the entire job automatically.

UPDATE: Starting with version 15.1, you can use the DataViewBase.EnableImmediatePosting property to post values to a data source without leaving an edited cell.