CODEWITHSUNDEEP
c#asp.net-mvc
David B
David B

Reputation: 929

Passing ViewModel in RedirectToAction causing ViewModel properties to be null

I have a requirement, where I need to pass the same instance of a ViewModel through to multiple actions in a controller. I am aware you can do this using RedirectToAction like below. The ViewModel has a property named ServiceTimes (which is a list). This has one item inside it, however when entering my OnlineBookingStaff action, the ServiceTimes property in here is null. Why is this?

[HttpPost]
public async Task<IActionResult> OnlineBookingServices(OnlineBookingViewModel viewModel)
{
    try
    {
        return RedirectToAction(nameof(OnlineBookingStaff), viewModel);
    }
}

The Action looks like this:

public async Task<IActionResult> OnlineBookingStaff(OnlineBookingViewModel viewModel)
{
    try
    {
        return View(viewModel);
    }
    catch (Exception ex)
    {
        await ExceptionAsync("Problem displaying Staff, Please try again later.", ex, false, true);
        return View();
    }
}

Upvotes: 1

Views: 879

Answers (1)

James Thorpe
James Thorpe

Reputation: 32222

RedirectToAction sends an HTTP 302 response and causes a client side redirect, which will end up in a GET to the url, losing your model.

You can instead just call it directly:

[HttpPost]
public async Task<IActionResult> OnlineBookingServices(OnlineBookingViewModel viewModel)
{
    return await OnlineBookingStaff(viewModel);
}

Upvotes: 2

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