Event onchange on result template about typeahead HOT 6 CLOSED

I prefer not to add an EventCallback as I think it’s best to let the consuming developer decide if they want to call StateHasChanged rather than forcing it on them.

Could you provide some example code of what you’re attempting?

from typeahead.

Hi!

Sure. I bet this is an easy task, I just need help to figure it out.

index.razor
`@page "/"

@if (Equals(SelectedProjekt, null).Equals(false))
{

ProjektComponent.razor

`
@Inject Data.Services.ProjektService ProjektService
<BlazoredTypeahead SearchMethod="@find" MinimumLength="3" Placeholder="Sök" @bind-Value="SelectedProjekt">

@context.Kund.Name - @context.DisplayName


@context.Kund.Name - @context.DisplayName


@if (Equals(SelectedProjekt, null).Equals(false))
{
if (ShowSelectedDetails)
{

from typeahead.

Ok I think this should work or at least get you most of the way there.

In your ProjektComponent you need to add the below into the code section:

private Data.Projekt _selectedProject;
[Parameter] protected Data.Projekt SelectedProjekt
{
    get => _selectedProject;
    set
    {
        _selectedProject = value;
        OnProjectChanged?.Invoke(_selectedProject);
    }
}
[Parameter] Func<Data.Projekt> OnProjectChanged { get; set; }

Then in your parent component do this:

<ProjektComponent OnProjectChanged="HandleProjectChanged" />

@if (Equals(SelectedProjekt, null).Equals(false))
{

    @SelectedProjekt.DisplayName

}

@code{
    /// Here I need an event for ui refresh when selectedprojekt has changed.
    Data.Projekt SelectedProjekt { get; set; }

    private async Task HandleProjectChanged(Data.Projekt selectedProjekt)
    {
        SelectedProjekt = selectedProjekt;
        StateHasChanged();
    }

}

Let me know how you get on.

from typeahead.

Since the Func<Data.Projekt> did not allow me to pass any args when doing invoke I switched to use an Event Handler.

In Child Component

   /// <summary>
    /// Private Placeholder
    /// </summary>
    private Data.Projekt _selectedProjekt;
    /// <summary>
    /// Data Binding
    /// </summary>
    [Parameter]
    protected Data.Projekt SelectedProjekt
    {
        get => _selectedProjekt;
        set
        {
            _selectedProjekt = value;
            OnProjectChanged?.Invoke(this, _selectedProjekt);
        }
    }
    /// <summary>
    /// Event Handler
    /// </summary>
    [Parameter] EventHandler<Data.Projekt> OnProjectChanged { get; set; }

In Parent Component

<ProjektComponent ShowSelectedDetails="true" OnProjectChanged="HandleProjectChanged" >
</ProjektComponent>

@if (Equals(SelectedProjekt, null).Equals(false))
{
    <div class="jumbotron">
        <p>@SelectedProjekt.DisplayName</p>
    </div>
}
@code{
    /// <summary>
    /// 
    /// </summary>
    protected Data.Projekt SelectedProjekt { get; set; }
    /// <summary>
    /// Event Handler
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="projekt"></param>
    void HandleProjectChanged(object sender, Data.Projekt projekt)
    {
        SelectedProjekt = projekt;
        StateHasChanged();
    }
}

This seem work like a charm. I have no idéa of if this is a good implementation or not. Any suggestions?

I belive you can close this issue now since there is no need for an event on the result template.

from typeahead.

Glad to hear you got it sorted, I’m not sure why you had an issue with using Func<> though.

from typeahead.

from typeahead.