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I have created rows and if user select any row basis on that counter will run and delete button will apear. My query is If i selected any row then by clicking on the delete button how can delete a row and counter should change into - (decreasing form).
kindly help me.

Here is what you can do 

 

it’s for single select list, which you can turn into multi select one. You can make the counter a part of you list component or you can have it separate and bound ‘selected’ to a text layer contents 


@Pavel_Kiselev i did it in the same way but my query is how can i delete a selected row or rows.