SonarLint analysis for all .c files in visual studio

I’m using Sonarlint version: 6.12.0.59751 in visual studio 2019. Sonarlint analysis was performed for only opened files in visual studio, how to make this to analyze for all files in the project?

Currently this is not possible - C/C++ are only analyzed when the file is opened or saved.
See the wiki for more information.