Igniteui-angular: Programmatically expanding row in tree grid throws error

[SteffNite]

Description

When trying to expand row in tree grid programmatically with expandRow it throws error "Cannot read property 'expansionStates' of undefined".

• igniteui-angular version: 10.1.10
• browser: Chrome 86.0.4240.198

Steps to reproduce

1. In code call:
   this.treeGrid.expandRow(rowPkId);

Result

Tree grid is shown, but row is not expanded and error is thrown: "Cannot read property 'expansionStates' of undefined".

Expected result

Expected row to be expanded.

Attachments

[DiyanDimitrov]

@SteffNite, I was able to reproduce this issue only if I call the expandRow method in the ngOnInit. This is expected since the grid is still not initialized in ngOnInit of its parent.
If this is your case I would suggest you to call expandRow in the ngAfterViewInit instead.

[SteffNite]

@DiyanDimitrov, Yes you are right. It was my mistake. Thank you very much for your time!