My current version - Telerik.Web.UI, Version=2021.1.330.45
I am using RadComboBox control and property EnableCheckAllItemsCheckBox="true". Therefore "Check All" feature enabled.
And other properties are as below
EnableLoadOnDemand = true;
ShowToggleImage = true;
ShowDropDownOnTextboxClick = true;
ShowMoreResultsBox = true;
ItemsPerRequest = 10;
EnableVirtualScrolling = true;
steps are as follows.
1. check "Check All" checkbox. Then first loaded 10 records got checked.
2. Then loaded another set of items clicking arrow icon at the bottom of the record list.
3. Loaded next 10 records and now all together showing 20 records. At this stage all checkboxes are unchecked but still "Check All" checkbox is checked.
4. Unchecked "Check All" check box and and checked again. Now it is checked only last loaded 10 records only instead of 20 records.
I tried to resolve this by following code. But not luck.
Highly appreciate your quick response since this is urgent for me.