as a newbie to Razor Pages I have a question regarding calling methods from Razor Page.
I have a method called subtractProduct defined in my domain model.
In my Index Page code I define IActionResult sellProduct which calls subtractProduct on specified ProductId. But I have no clue how to call this method on my html page. I've tried a lot of combinations, but nothing seems to be working. Anyone knows how to deal with this? Any help is greatly appreciated!
My domain model is:
public class Product
{
public int ProductId { get; set; }
public int Quantity { get; set; }
...
public void SubtractProduct()
{
Quantity -= 1;
}
}
My Index Page code is:
public class IndexModel : PageModel
{
private readonly CfEshop.Data.ApplicationDbContext _context;
public IndexModel(CfEshop.Data.ApplicationDbContext context)
{
_context = context;
}
public IList<Models.Product> Product { get;set; }
public async Task OnGetAsync()
{
Product = await _context.Products
.Include(p => p.Categories).ToListAsync();
}
public IActionResult sellProduct(int id)
{
var products = _context.Products;
_context.Products.Find(id).SubtractProduct();
return Page();
}
}
And finaly my Razor page:
@page
@model CfEshop.Pages.Product.IndexModel
<h2>Index</h2>
<table class="table">
<thead>
<tr>
<th>
@Html.DisplayNameFor(model => model.Product[0].Quantity)
</th>
</tr>
</thead>
<tbody>
@foreach (var item in Model.Product)
{
<tr>
<td>
@Html.DisplayFor(modelItem => item.Quantity)
</td>
<td>
<a asp-page-handler="SellProduct" asp-route="@item.ProductId">Sell Product</a>
</td>
</tr>
}
</tbody>
</table>
Razor pages have handler-methods
which are HTTP verbs. So to call a method from your page you need to put On
followed by the http verb you want
then your method name
.
E.g.:
public IActionResult OnGetSellProduct(int id)
{
var products = _context.Products;
_context.Products.Find(id).SubtractProduct();
return Page();
}
And in your view pass the name to the asp-page-handler
without the OnPost or OnGet
prefix or Async
suffix.
Edit: here is the view sample:
<a asp-page-handler="SellProduct" asp-route-id="@item.ProductId">Sell Product</a>
For more information check those out: