Saves the active editor's value to a data source without closing the editor.
Before the active editor's new value is posted to a data source, it is validated. If a new value is valid, it is posted to a data source and the editor can be closed. If a new value is invalid, the value isn't posted to a data source, and the editor cannot be closed until its value is corrected.
After the editor is displayed, it can be obtained using the DataControlBase.ActiveEditor property.
To learn more, see Showing and Hiding Editors.