In my project I would like to pass more than one parameter (id and description) to my view from the controller.

This is the structure of my project:

ProductController:

public IActionResult DettaglioDescrizione(int id, string descrizione)
{
    ViewData["ProductId"] = id;
    ViewData["ProductDescription"] = descrizione;
    return View("Details");
}

Details.cshtml view:

<div class="text-center">
    <h1 class="display-4">Prodotti</h1>
    <p>Id prodotto: @ViewData["ProductId"]</p>
    <p>Descrizione prodotto: @ViewData["ProductDescription"]</p>
</div>

I know that I have to modify my pattern in Startup.cs. If I modify in this way it works properly:

app.UseEndpoints(endpoints =>
{
     endpoints.MapControllerRoute(
         name: "default",
         pattern: "{controller=Home}/{action=Index}/{id?}/{descrizione?}");
});

My question is: there is a better way to do this without add "/" for each parameter?

CodePudding user response：

There are three binding sources in model binding

1. Form Values
2. Route Values
3. Query string

what you are doing right now is from a route value, maybe you can use a query string /1?description=value or maybe you can do httppost and get the value from the form.

CodePudding user response：

If you want to pass multiple parameters from controller to action or from action to controller.You can try to create a Model.Action can pass data with a form to controller.Action returns a model to view.So that you don't need to pass more than one parameters with route or ViewData.Here is a demo:

Model:

public class Product
    {
        public int ProductId { get; set; }
        public string descrizione { get; set; }

    }

Action:

public IActionResult DettaglioDescrizione(Product product)
{
    return View("Details",product);
}

Details View:

@model Product
<div class="text-center">
    <h1 class="display-4">Prodotti</h1>
    <p>Id prodotto: @Model.ProductId</p>
    <p>Descrizione prodotto: @Model.ProductDescription</p>
</div>

View:

@model Product
<form method="post" asp-action="DettaglioDescrizione">
    <div class="form-group">
        <label asp-for="ProductId" class="control-label"></label>
        <input asp-for="ProductId" class="form-control" />
    </div>
    <div class="form-group">
        <label asp-for="ProductDescription" class="control-label"></label>
        <input asp-for="ProductDescription" class="form-control" />
    </div>
    <input type="submit" value="submit" />
</form>

result:

CodePudding user response：

If You don't want to change your route def. use query string parameters. If You want also don't have to many parameters in your action method use a custom class with [FromQuery] annotation:

public class ProductController : Controller
{
    public IActionResult DettaglioDescrizione([FromRoute] id, [FromQuery] MyClassDto param)
    {
        ViewData["ProductId"] = id;
        ViewData["ProductDescription"] = descrizione;
        
        return View("Details");
    }
}

public class MyClassDto
{
    public int Description { get; set; }
}

Route def.

app.UseEndpoints(endpoints =>
{
     endpoints.MapControllerRoute(
         name: "default",
         pattern: "{controller=Home}/{action=Index}/{id?}");
});

Usage:

https://localhost/Product/DettaglioDescrizione/7?Description=Hello