Asp.NET Webforms(Aspx) jQuery Datatables

Hello I have enclosed my project.
Please Open FileMasterWithClient.aspx
Now Click on Add Client Option
a New Popup Windows Open
Here in Popup Windows User Select the data maybe in multiple rows then after selection
it reflects in FileMasterWithClient.aspx webpage

Now In Popup Window (It Should me in modal box)
on FileMasterWithClient.aspx (When Data added here remove option required row wise)

Sql Full Script -> https://pastebin.com/wMnw8qHH
Project Source -> https://we.tl/t-mqXOQoxVtX

Mention what is total of 4+6 in top of your bid otherwise it won't consider.

Thanks.