Hi Andrew,

If you are building a reactive web application then in the OnChange Event of the dropdown you should reset the StartIndex Local variable to 0 and refresh the aggregate.

If you are building a traditional web application then on the OnChange event you can call the Refresh<Entity>Table action with ResetPagination property set to True.

If you next time when ask a question be so kind to also select the application type (Traditional, Reactive, Mobile) that it is easier for the community to answer you correctly.

Regards,

Daniel

Why did you need to put the table in a separate block?

If you want to get this working with the block, the block needs an input parameter like ResetPagination (boolean).

Then in the OnChangeParameter event of the block you should reset the StartIndex Local variable to 0 and refresh the aggregate. 

in my case Using  reactive web application 

i create dropdown in screen then create block to show data from table  and pagination  

how can i link btween  dropdown that Existing screen and pagination  that Existing in the block

In order to reset the pagination, you need to reset your "startIndex" variable (The one you associated with the pagination widget) to 0.