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best practices for 'The model item passed into the dictionary is of type' scenarios in ASP.NET Core MVC?

👀 Views: 449 đŸ’Ŧ Answers: 1 📅 Created: 2025-06-12
asp.net-core mvc model-binding C#

I've looked through the documentation and I'm still confused about I've been struggling with this for a few days now and could really use some help. I'm working with a frustrating scenario in my ASP.NET Core MVC application where I'm getting the following behavior: "The model item passed into the dictionary is of type 'MyApp.Models.User', but this dictionary requires a model item of type 'MyApp.ViewModels.UserViewModel'." This behavior occurs when I try to render a view after successfully submitting a form. Here's a snippet of the controller method that handles the form submission: ```csharp [HttpPost] public IActionResult Create(UserViewModel userViewModel) { if (ModelState.IsValid) { var user = new User { Name = userViewModel.Name, Email = userViewModel.Email }; _context.Users.Add(user); _context.SaveChanges(); return RedirectToAction("Index"); } return View(userViewModel); } ``` And in my Create.cshtml view, I'm rendering the form like this: ```razor @model MyApp.ViewModels.UserViewModel <form asp-action="Create"> <label asp-for="Name"></label> <input asp-for="Name" /> <label asp-for="Email"></label> <input asp-for="Email" /> <button type="submit">Create</button> </form> ``` The question arises when I try to return the view after an unsuccessful form submission. I initially thought I was passing the correct model type back to the view. I've checked that my view is strongly typed to `UserViewModel`, yet I'm getting this behavior indicating that it's attempting to use a `User` type instead. I've also ensured that the view is located in the correct folder and that there are no conflicting views with similar names. Can someone guide to understand why this is happening and how to fix it? What am I missing? This is part of a larger application I'm building. What am I doing wrong? For context: I'm using C# on macOS. Has anyone else encountered this?