C#•2y ago

❔ How can I pass model data to my controller if I have another POCO class in the model?

Let's imagine that I have the classes:

public class Address
{
    public int Id { get; set; }
    public string? Street { get; set; }
    public string? BuildingNumber { get; set; }
    public string? Description { get; set; }
    public Entrance[]? Entrances { get; set; }
    public DateTime LastEdit { get; set; }
}

public class Entrance
{
    public int Id { get; set; }
    public string? Name { get; set; }
    public string? Description { get; set; }
    public Floor[]? Floors { get; set; }
}

public class Floor
{
    public int Id { get; set; }
    public string? Name { get; set; }
    public string? Description { get; set; }
}

public class Address
{
    public int Id { get; set; }
    public string? Street { get; set; }
    public string? BuildingNumber { get; set; }
    public string? Description { get; set; }
    public Entrance[]? Entrances { get; set; }
    public DateTime LastEdit { get; set; }
}

public class Entrance
{
    public int Id { get; set; }
    public string? Name { get; set; }
    public string? Description { get; set; }
    public Floor[]? Floors { get; set; }
}

public class Floor
{
    public int Id { get; set; }
    public string? Name { get; set; }
    public string? Description { get; set; }
}

How can I create a simple editor for these classes? I mean that my Create() method takes something like this:

public async Task<IActionResult> Create([Bind("Id,Street,BuildingNumber,Description,Entrances")] Address address) { ... }

public async Task<IActionResult> Create([Bind("Id,Street,BuildingNumber,Description,Entrances")] Address address) { ... }

Of course I cannot bind Entrances property because it is another class and it is an array. How can I do the trick? What should my controller accept and how can I do it in the view?

9 Replies

Pobiega•2y ago

Is this Blazor or something special? Because in a normal web api, you just do this without any bind attribute at all and it works exactly as expected, assuming you are taking json in

DasicOP•2y ago

No, it's ASP.NET Core 7

Pobiega•2y ago

ok then its literally just

public async Task<IActionResult> Create(Address address) { ... }

public async Task<IActionResult> Create(Address address) { ... }

DasicOP•2y ago

I've done this using the official tutorial https://learn.microsoft.com/en-us/aspnet/core/tutorials/first-mvc-app/controller-methods-views?view=aspnetcore-7.0

Part 6, controller methods and views in ASP.NET Core

Part 6, add a model to an ASP.NET Core MVC app

Pobiega•2y ago

ah, this wont be as simple as this isnt for a json webapi - this is for html forms

Pobiega•2y ago

https://www.cafe-encounter.net/p3413/model-binding-an-array-from-a-form-post-asp-net-mvc-asp-net-core

Chris F Carroll

Model Binding an Array from a Form Post | Asp.Net MVC & Asp.Net Core

DasicOP•2y ago

Thank you. You've also mentioned a json WebAPI, is it the right tutorial to do it? https://learn.microsoft.com/en-us/aspnet/core/tutorials/first-web-api?view=aspnetcore-7.0&tabs=visual-studio

Tutorial: Create a web API with ASP.NET Core

Learn how to build a web API with ASP.NET Core.

Pobiega•2y ago

sure, that seems okay

Accord•2y ago

Was this issue resolved? If so, run /close - otherwise I will mark this as stale and this post will be archived until there is new activity.

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❔ How can I pass model data to my controller if I have another POCO class in the model?