Topic Database part Creating application Installing Package for Entity framework core From NuGet Adding Connection string and Setting up DbContext Adding Category, SubCategory, MainProduct Model in Models Folder Adding DbSet for Category, SubCategory, and MainProduct Model in DatabaseContext class Adding Controller [DemoController] Getting Data from Database using Entity framework core. Adding View [index.cshtml] Binding Category Dropdownlist using new Tag helper Adding SubCategory and Product Dropdownlist to index.cshtml View Adding SubCategory and GetProducts Action Method to Demo Controller Adding Jquery reference on View and Default items in drop-down list Binding SubCategory and Product drop-down list with jquery Ajax Adding Index Action method for handling post request and getting selected values Saving and Run Application Read Entire Article on below link :- http://www.c-sharpcorner.com/article/creating-simple-cascading-dropdownlist-in-asp-net-core-mvc-with-
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