Hello Georgi,

Thank you for making an improved sample for me and a little video. I appreciate it very much.

It works in my real project aswell. So, nice find. But this solution gives me other problems (because ofcourse in my real project the objects are more complex plus I like to code with obj.equals(obj) which needs to be the actual instance of the object as you know).

In other words, if I'm going to implement this solution I'll have to rewrite a lot.

So my question is: Why does it work like this?

If you create entirely new objects the grid seems to be tricked into reloading the data. But if I use your Refresh method with ReloadData it doesn't. Why?

oh p.s: I did alter the LINQ query a bit, like so:

var activePeople = (from p in DummyRespository.People
                                where p.IsActive
                                select new Person
                                {
                                    Name = p.Name,
                                    IsActive = p.IsActive,
                                    Orders = p.Orders.ToList()
                                }).ToList();

Because I like to work with strongly typed instances. I also applied this in my real project.

p.p.s.: Also found out that first setting datasource equal to an empty list and then to a filled list has the desired effect???

this is the sample  :

Hello DannyvDK,

Thanks for attached sample. Maybe the easiest way to solve your issue, could be if you modify your Linq. For example:

private void RefreshGridActive()

{

    var activePeople = (from p in DummyRespository.People

                        where p.IsActive

                        select new

                        {

                            Name = p.Name,

                            IsActive = p.IsActive,

                            Order = p.Orders.ToList()

                        }).ToList();

     this.ultraGrid1.DataSource = activePeople;

    this.ultraGrid1.Rows.Refresh(Infragistics.Win.UltraWinGrid.RefreshRow.ReloadData);

    this.ultraGrid1.Rows.ExpandAll(true);

}

Please take a look on attached video file and sample for more details and if you have any questions, feel free to write us

Regards

Hey Mike,

I know about BindingLists and have my reasons not to use them. So let me deal with the headaches. :-)

In my real project, the collection is already an empty list (I believe I already got this tip some time ago from Infragistics but new requirements made the problem return).

So I have attached a small project to illustrate my problem. It's called PersonOrderRefreshing.

1) Run it.

2) Press "add order" and you'll see the grid refresh correctly.

3) Now in method RefreshGrid() of Form1 put the call to RefreshGridAll in comment and decomment RefreshGridActive.

4) Run the project.

5) Press "add order" and you won't see the grid refresh properly. Why?

6) Decomment all code in RefreshGrid

7) Run it.

8) Add orders and try to switch between active/all People. Doesn't work either. Why?

Thank you in advance for looking into my problem.