One way binding component parameter to source

[danielchalmers]

Is there an equivalent to WPF's OneWayToSource binding mode so I can always have the result of my component's parameter in the parent?

[david-acker]

I'm not super familar with Blazor or WPF, so I'm not sure if this is 100% equivalent, but you could use an EventCallback to notify the parent component when the component parameter is changed in the child.

Example from the docs: Binding with component parameters

[Parameter]
public int Year { get; set; }

[Parameter]
public EventCallback<int> YearChanged { get; set; }

private async Task UpdateYearFromChild()
{
    await YearChanged.InvokeAsync(r.Next(1950, 2021));
}