How to load partial razor page into razor view

Question

I am trying to replace my view components with razor pages but it seems that it's not possible to load a partial razor page because a model is expected to be passed yet it is my understanding that the model for a razor page should be declared in the OnGetAsync method. Here is my code...

Razor Page

@page "{id:int}"
@model _BackgroundModel

<form method="POST">
    <div>Name: <input asp-for="Description" /></div>
    <input type="submit" />
</form>

Razor Page Code-Behind

public class _BackgroundModel : PageModel
{
    private readonly IDataClient _dataClient;

    public _BackgroundModel(IDataClient dataClient)
    {
        _dataClient = dataClient;
    }

    [BindProperty]
    public BackgroundDataModel Background { get; set; }

    public async Task OnGetAsync(int id)
    {
        Background = await _dataClient.GetBackground(id);
    }

    public async Task OnPostAsync()
    {
        if (ModelState.IsValid)
        {
            await _dataClient.PostBackground(Background);
        }
    }

}

Razor View

<div class="tab-pane fade" id="client-background-tab">
    <div class="row">
        <div class="col-sm-12">
            @await Html.PartialAsync("/Pages/Client/_Background.cshtml", new { id = 1 })
        </div>
    </div>
</div>

Page Load Error

InvalidOperationException: The model item passed into the ViewDataDictionary is of type '<>f__AnonymousType0`1[System.Int32]', but this ViewDataDictionary instance requires a model item of type 'WebApp.Pages.Client._BackgroundModel'

In this example (as per MS recommended approach in their docs) the model is set inside the OnGetAsync method which should be run when the page is requested. I have also tried @await Html.RenderPartialAsync("/Pages/Client/_Background.cshtml", new { id = 1 }) but the same error result.

How can I load the razor page into my existing view?

You view model is _BackgroundModel but you are calling the view with an int value. Try some thing like @await Html.PartialAsync("/Pages/Client/_Background.cshtml", new _BackgroundModel ()). — Ibrahim Khan
@Azim The model should be created within the OnGetAsync within the code-behind file not passed by the calling view. The page load requires an int value as defined at the top of the razor page @page "{id:int}" and this int value is passed to OnGetAsync(int id) when page loads which is why i'm passing an int value from the calling view and not a model. — OjM
if you are passing model to partial view then why you need to pass 'id' to it — Saineshwar
@Saineshwar this is how razor pages work. They essentially have their own controller in the code-behind file and therefore do not need or expect a model to be passed. this is the same concept as view components which are called with @await Component.InvokeAsync("name"). i was looking for a way to load a razor page in a similar way but it doesn't seem this is possible as per reply in the comments of MS docs Razor Pages — OjM

OjM OjM · Accepted Answer · 2017-11-13T21:48:31

Microsoft confirmed this cannot be achieved and therefore razor pages cannot be used as a replacement for view components.

See the comments of their docs...

MS docs

@RickAndMSFT moderator15 hours ago @OjM You can redirect to the page, or you can make the core view >code into a partial and call it from both.

Pages are not a replacement for partials or View Components.

How to load partial razor page into razor view

1 Answers