[Vuejs]-Adding publickey and file into const data in Vue.js

To use dispatch with parameters you can simply:

this.$store.dispatch("uploadCourseResourceFile", {publicKey: this.$route.params.id, file})

And you can access your data from uploadCourseResourceFile just like you are doing.

Your const data does not make much sense in this case. Accessing this.file in this context you are showing will not return what you want.