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Hi Wang,
It is not recommended to modify the rows' visibility as it will most likely result in the appearance of blank spaces into your TreeListView or other unpredictable behavior. I wouldn't suggest working with the visual elements when the control is virtualized due to the containers recycling mechanism. Please, take a look at the UI Virtualization article.
What I can suggest is to utilize a filtering approach to determine which items should be visible.
Attached, you can find a sample project in which I've demonstrated this approach. What I've done is I added a IsVisible property which determines whether an item should be visible and not setting a Visibility directly. Please, review the project and let me know if you find it helpful.
Regards,
Dimitar Dinev
Progress Telerik
It is not recommended to modify the rows' visibility as it will most likely result in the appearance of blank spaces into your TreeListView or other unpredictable behavior. I wouldn't suggest working with the visual elements when the control is virtualized due to the containers recycling mechanism. Please, take a look at the UI Virtualization article.
What I can suggest is to utilize a filtering approach to determine which items should be visible.
Attached, you can find a sample project in which I've demonstrated this approach. What I've done is I added a IsVisible property which determines whether an item should be visible and not setting a Visibility directly. Please, review the project and let me know if you find it helpful.
Regards,
Dimitar Dinev
Progress Telerik
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wang
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answered on 25 Jul 2019, 01:44 AM
OKļ¼thanks a lot , I will try it .