Visual Studio 2022 - Issues with Razor Page Model Binding for Nullable Types
I've been working on this all day and I'm not sure how to approach After trying multiple solutions online, I still can't figure this out... I'm currently experiencing a frustrating issue with model binding in my ASP.NET Core Razor Pages application. I have a Razor Page that is bound to a model containing a nullable `DateTime` property. However, when the form is submitted with an empty date field, it seems that the model binder doesn't properly interpret it as null, which is causing a `System.InvalidOperationException` when I attempt to access the property in my `OnPostAsync` method. Here's the relevant part of my code: ```csharp public class MyPageModel : PageModel { [BindProperty] public DateTime? EventDate { get; set; } public async Task<IActionResult> OnPostAsync() { if (!ModelState.IsValid) { return Page(); } // This line throws an InvalidOperationException if EventDate is null var eventDateValue = EventDate.Value; //... further processing return RedirectToPage("Success"); } } ``` I've tried adding a custom model binder for `DateTime?`, but it didn't resolve the issue. I also checked that the form field is correctly formatted and that the model state is valid before accessing the value. In the form, I'm using a standard input element for the date: ```html <input asp-for="EventDate" type="date" class="form-control" /> ``` It appears that if the input is left empty, the model binder is not setting `EventDate` to null, instead it leads to the exception when I call `EventDate.Value`. How can I ensure that the model binding is correctly interpreting empty fields as null? Is there a better way to handle this scenario? Am I missing something obvious? This is part of a larger web app I'm building. Thanks for your help in advance!