how to to Bind Complex Types with ASP.NET Core MVC and JSON Data - Bad Request scenarios
I'm having trouble with I'm performance testing and I've looked through the documentation and I'm still confused about I'm working with an scenario when trying to bind a complex type in my ASP.NET Core MVC application. I'm sending a JSON object from the client side, but the model binding is failing, resulting in a 400 Bad Request. My complex type looks something like this: ```csharp public class Order { public int Id { get; set; } public string CustomerName { get; set; } public List<Item> Items { get; set; } } public class Item { public int ProductId { get; set; } public int Quantity { get; set; } } ``` And the JSON I’m sending looks like this: ```json { "Id": 1, "CustomerName": "John Doe", "Items": [ { "ProductId": 101, "Quantity": 2 }, { "ProductId": 102, "Quantity": 1 } ] } ``` In my controller, I have the following action method: ```csharp [HttpPost] public IActionResult CreateOrder([FromBody] Order order) { if (!ModelState.IsValid) { return BadRequest(ModelState); } // Process the order... return Ok(); } ``` When I test this with Postman, I receive a response indicating that the model state is invalid, but when I inspect `ModelState`, it contains errors that say fields like `Items` are not bound correctly. I’ve also tried setting the `Content-Type` header to `application/json` in Postman, and I checked that my JSON is properly structured. I’m using ASP.NET Core 6.0, and I’ve made sure that the `Startup.cs` has the necessary configurations for MVC. I need to seem to figure out why the binding fails. Any ideas on what could be causing this scenario? What am I doing wrong? This is for a microservice running on Debian. Any help would be greatly appreciated! I'm working with C# in a Docker container on macOS. Hoping someone can shed some light on this.