Summing up parents and children

[Kristjan Einarsson]

Hi,
I have a question about the functionality of TreeListView.

(As seen in the picture). If I would change the Carrot value to 800, can I let the Vegetables value change/sum up automatically ?

And could increase/decrease the value of the Vegetables and increase the value of the children ?

Is there any simple built-in solution for this ?

Best regards
kristján.

[Miroslav]

Hi Kristjan Einarsson,

Unfortunately there is no built-in hierarchical aggregation. You need to implement this in your ViewModel.

Greetings,
Miroslav
the Telerik team

[Kristjan Einarsson]

Thought as much, just wanted to be sure.

Are there any plans implement hierarchical aggregation ?

Regards
Kristján.

[Miroslav]

Hi Kristjan Einarsson,

No, there are no plans for hierarchical aggregation for Q3 and we have not made any plans beyond it yet.

Greetings,
Miroslav
the Telerik team

[Kristjan Einarsson]

Ok thanks for letting me know.

[TSRG - IT]

Hi Kristjan,

If you're still struggling with this problem it isn't too hard, I managed to implement this into the TreeListView I am using. I've used a recursive function to sum of rows from the bottom up so to speak. I first sum all the children then traverse up the tree to the root node. It goes something like this...

void GetTotals(object node)
{
if (node.Items.Count > 0)
{
foreach (item in node.Items)
{
GetTotals(item);
}
TotalChildrenNodes(node);
}
}

To dynamically update totals you'll have determine the updated node's ancestors.

Hope it helps.

Cheers,

Tim.

[Kristjan Einarsson]

thanks Timothy,

well I outsourced it to the guy sitting next to me :) I'll give him the info.

cheers
kristján

[Vamshi]

Hey TSRG - IT

Do you have any idea for getting node children count after applying column filter?

Thanks