Blazor, how can I trigger the enter key event to action a button function?

Question

I was trying the todo-list example from Microsoft: https://docs.microsoft.com/en-us/aspnet/core/tutorials/build-a-blazor-app?view=aspnetcore-3.1

I want to add a todo item and instead of pressing the button with a mouse click I want to press the enter key. I'm not happy with using JS like in this solution: How to set the focus to an InputText element? And I try to trigger the method private void Enter(KeyboardEventArgs e) by this line of code:

<button @onclick="AddTodo" @onkeypress="@(e=>Enter(e)" tabindex="0"  >Add todo</button>

It didn't work.

enter code here
<input placeholder="Something todo" @bind="newTodo" />
<button @onclick="AddTodo" @onkeypress="Enter" tabindex="0"  >Add todo</button>

@code {
    private IList<TodoItem> todos = new List<TodoItem>();
    private string newTodo;

    private void AddTodo()
    {
        if (!string.IsNullOrWhiteSpace(newTodo))
        {
            todos.Add(new TodoItem { Title = newTodo });
            newTodo = string.Empty;
        }
    }

    //private void Enter(KeyboardEventArgs e)
        private void Enter()
    {
        //if (e.Key == "Enter")
        {
            if (!string.IsNullOrWhiteSpace(newTodo))
            {
                todos.Add(new TodoItem { Title = newTodo });
                newTodo = string.Empty;
            }
        }
    }
}

Answer 1

onkeypress is fired only for character keys. onkeydown will fire for all keys pressed. I found some explanation of differences between all key events here

Try it with onkeydown and it worked:

<input type="text" @onkeydown="@Enter" />

In the event handler you will have to do this (notice that I check for both Enter and NumpadEnter keys):

public void Enter(KeyboardEventArgs e)
{
    if (e.Code == "Enter" || e.Code == "NumpadEnter")
    {
         // ...
    }
}