What is the best way to set a custom pattern format to a DateTimeEdit and TimeSpanEdit Column of a GridTreeControl? I did the following way, but it doesn't work:
new GridTreeColumn() { StyleInfo = new GridStyleInfo() { CellType = "DateTimeEdit", Format "dddd, dd.MM.yyyy hh:mm", HorizontalAlignment = HorizontalAlignment.Center
new GridTreeColumn() { StyleInfo = new GridStyleInfo() { CellType = "TimeSpanEdit", Format = " h 'h' m 'min'", HorizontalAlignment = HorizontalAlignment.Center }