RadzenDataGrid Grouping Expand/Collapse all

Radzen.Blazor Components
1

Any plans for an expand/collapse all feature for RadzenDataGrid's grouping?

If not already I would like to request that as a feature.

Maybe the GroupResult items found in RadzenDataGrid.GroupedPagedView could have a modifiable "IsExpanded" property that I could manage myself?

Alternative could be something like exposing the collection of RadzenDataGridGroupRows with a modifiable "IsExpanded" property that I could manage myself.

Another alternative, albeit less flexible, could be a simple ExpandAllGroups()/CollapseAllGroups() function on the RadzenDataGrid itself

2

Hi @lanceGeorgeson,

We will do our best to provide way to expand groups runtime in our next update.

3

Any update on this? Looking forward to using this as well.

4

You can use GroupRowRender to set if group is expandable or not:
https://blazor.radzen.com/datagrid-grouping-api

5

But how can be done at runtime in a massive way?

6

This is exactly how expanding item(s) can be done runtime.

7

Sorry but I haven't understood how to do :face_with_spiral_eyes:
I would like ho have a button/checkbox extra grid that makes collapse / expand all first level group.

8

Just set a variable on your button click and reload the DataGrid. You can check in this event the value of this variable.

9

I see al least two problems doing this way:

  1. reloading the grid loses all selection done on the rows item (cell with checkboxes for examples) unless I save selections before each expand/collapse all click (it's very uncomfortable or impossibile to do that depending on use cases)
  2. how can I then expand / collapse a single row if my GroupRowRender is driven by the button variable? I have to disable (like with a tristate checkbox) the collapse / select all and only if my variable is now null I can operate on a single row (again very uncomfortable)
10

We are open for more comfortable ways, feel free to open a pull request with better more suitable for your case implementation. We will review your code and if it’s usable and doesn’t brake any existing scenario we will merge it.