Is there a way or query by which I can find the version number of SSIS packages (*.dtsx files)?
I have the *.dtsx files in my Team Foundation Server for
*.dtsx
You can use this query if you use project deployment solution (If you have SSISDB in your server) :
SELECT [name], [package_format_version] FROM [SSISDB].[catalog].[packages];
Note: Integration Services must be installed