The main objectives of this article are: Create Get By Id Endpoint In API Project. Creating Update Endpoint In API Project. Creating A React Component To Show Update Form Create Get By Id Endpoint In API Project: To update any record, we first need to fetch it by its 'id'. So let's create a get id by an endpoint in our API project. API_Project/Controllers/SuperVillainController.cs: [HttpGet] [Route("{id:int}")] public async Task<IActionResult> Get(int id) { var villainById = await _reactJSDemoContext .SuperVillain.Where(_ => _.Id == id) .FirstOrDefaultAsync(); return Ok(villainById); } (Line: 2)Since it is a second HTTP Get Action method, so we have to explicitly specify the route. The route expression '{id:int}' represent 'id' value must be integer value. (Line: 5-7) Fetching the record by 'id' from the database. Create Update Endpoint In API Project: Let's create the HTTP PUT action method. API_Project/Controllers/Supe