Hi, 

I'm facing the same issue and can't able to resolve it.

I'm assign ObservableCollection<Class1>(records) to xamgrid.itemsource.

Class1 constructor contains 3 more classes IEnumerable<class2/3/4> in parameter and last argument is string [].

Class2/3/4 has empty constructor but string[] don't. I need to use string[] or list<string> as last parameter.

How can I achieve this or resolve this issue.

Please Help !!!

Thanks

The XamWebGrid will attempt to make a new data object of your bound object for situations like Filtering and AddNewRow.  When it does it looks to use the empty input constructor of the object.   If it cannot find one, it raises an exception in order to notify you that it needs this data object created for it.

Arrays don't usually have empty constructors, they either require a default list or require you declare its size.

Handle the XamWebGrid's DataObjectRequested event.  In there, check to see what object is currently being made, and then if it is the object type that needs developer action provide an object of the correct type.

private void dataGrid_DataObjectRequested(object sender, DataObjectCreationEventArgs e)

{

if (e.ObjectType== typeof(string[]))

{

e.NewObject= new string[5];

}