Controlling file data

Hello All,

I want to control the file data with the Boolean switch and its working but when i do the case false then also labview is writing a space. 

Can some body help how can i resolve this issue. I want nothing in the file when the case is false.

One more thing if i write some integer in the file then also it writes zero(0) in the file.

Please help me out.

Thanks

Siddharth