Master/Detail Hierarchy datagrid error when expanding empty master record

[joshbooker]

This is the same issue. Fix is use foreach instead of ForEach()

Master Detail Null Reference Error

Hi, I get a NullReferenceError when the results are empty from a GetChildren data operation. For example, after creating a page using the Mater/Detail Hierarchy wizard, the code to load the children on RowExpand is this: ${result}.ToList().ForEach(event.ShipmentItems.Add); suggest changing to this: if(${result} != null && ${result}.Any()) {${result}.ToList().ForEach(event.ShipmentItems.Add);}; *EDIT: Turns out Any() and Count() methods excute an extra db query so this is preferred: var r…