How to open a file in the Custom spfx teams tab in MS teams

I have created the custom teams Tab using spfx to list all the files in my own desing in the MS teams.In that while clicking the file i need to open a file as same as we open the file in "Files" tab.I tried setting the top url for the page , also many other work around but no luck.

so can anyone suggest me how to open the file from the custom SPFX MS Teams tab?