1. Complie button VS Build & View button
Compile buttion should be clicked after context in xxx.bib file modified. then, Build & View button should be click to show pdf-window. The continuous operations is helpful for some weird problems.
2.Solution of Exception produced by specific symbol
"_" symbol in @[article, proceedings,...] fields makes TeStudio throw excption. Closing TexStudio software and deleting files whose extension names include .bbl , .aux, .blg, .log before restaring and comipling can sovle this kind issue. Ammention textension name files will be re-producted.
3.Relation between .tex file and .bib file.
Articles occur in Reference Part only when tex. file cites them, the rest aritcles in .bib file is hidden.