nested sfListview not showing

Question

I understand that nesting a listview within a listview is not best practice, however, for our use case, we are simply listing a number of items, and then a number of subitems beside them in a horizontal row, like this: ITEM 1 mod 1 mod 2 mod 3 ITEM 2 mod 1 mod2 ITEM 3 mod 1 etc....We are using a horiztonal sfListivew to accomplish the first listview of items and then within that listview, we're using another nested sfListview to display the modifiers. The parent sfListivew is displaying as expected. However, the modifier list does not show up. I know the data is there because if I move the label around, I can see the letters overlay on the first listview, but in our below code, the modifier listview disappears.Can you tell me why that might be?```

Muthu Kumaran Gnanavinayagam · Answer

Hi Tommy, 
 
We have checked the reported query “”We would like to let you know that the ItemSize (both height and width) for each items in View will be got from the respective renderers by passing the desired content(underlying data) as View and layout the measured size as ListViewItem based on ItemIndex in SfListView. We regret to inform you that while measuring the size(both height and width) for the nested SfListView(inner list as one ItemData) as content in respective renderers, the size is measured as 1 because the SfListView content does not contain any data and it uses ScrollView as child. So, both height and width is returned as 1 from the respective renderers and this is the actual behavior. We have also ensured with Xamarin ListView too by using the same scenario with HasUnEvenRows as “true” and behaves as mentioned. To overcome the issue, either you need to define the size for each inner SfListView or set the inner SfListView’s AutoFitMode as “Height” and define the ItemSize for outer ListView. In our sample we have checked whether the items are loaded in the View when defining ItemSize as mentioned above. 
 
 For your reference, we have attached the sample and you can download it from the below link.  
 
Sample link: http://www.syncfusion.com/downloads/support/forum/135866/ze/ListViewSample-2065445642 
 
Please let us know if you require further assistance. 
 
Regards, 
G.Muthu kumaran.

pumaprog · Answer

Thank you for the response. However, in your example, it appears that the listview is not nested in the same way as I'm describing. In my example, I have a Listview and then an sfListview within that. Then, in the ItemTemplate of the sfListview, I have another nested Listview.

I don't see that level of nesting in your example. That is to say that I tried to autofitmode with setting the outer size and it still does not work.

pumaprog · Answer

We fixed the issue ourselves by writing our own Repeater.  Thanks anyway, though.

Muthu Kumaran Gnanavinayagam · Answer

Hi Tommy, 
 
Thanks for your valuable response. 
 
Regards, 
G.Muthu kumaran.

Praddy · Answer

Hi Muthu,I have used SFListView for displaying a nested list view with expand and close option.The list view expands to the correct row size on first click, but doesn't expand fully from the second time.I have used AutoFitMode as true, as my list item template heights are dynamic.Any help please?

Muthu Kumaran Gnanavinayagam · Answer

Hi Praddy, 
 
As we have mentioned earlier,  you need to define the size for each inner SfListView or set the inner SfListView’s AutoFitMode as “Height” and define the ItemSize for outer ListView to overcome the reported behavior. Please find the limitation link below. 
 
UG Link: https://help.syncfusion.com/xamarin/sflistview/item-size-customization#limitations  
  
Regards, 
G.Muthu kumaran.