Hi Goutham
Greetings from Syncfusion support
Based on your query, we understand that you have faced issue in selecting the grid’s all records when enabling virtualization.
By default in EJ2 Grid when virtualization is enabled the grid renders only the set of records that fit into the viewport, Each time when the user scrolls out of the set of the records that are visible new records will be rendered.
In virtualization Grid when we select the all records using the select all checkbox, we only select all the records which is available in the current DOM element. This is the default behavior of the EJ2 Grid Virtualization process.
Please find the limitations of the ej2 grid virtualization,
Please get back to us for further assistance,
Regards
Vignesh Sivagnanam