58 lines
1.9 KiB
Plaintext
58 lines
1.9 KiB
Plaintext
 
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@implements IDisposable
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@* In-page errors (b2b.next's WidmannErrorViewer): the validation messages of the cascading EditContext, then
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AdditionalError (one message) and AdditionalErrors (a list; never join a list into one string), one <li> each.
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Renders nothing when there is nothing to show. Messages are text, not markup: they can contain file names. *@
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@if (HasContent)
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{
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<DAlert Color="@(Severity is ErrorViewerSeverity.Warning ? DAlertColor.Warning : DAlertColor.Error)" Variant="DAlertVariant.Soft"
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class="@Cx("text-sm", ContainerClass)">
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<ul class="list-inside list-disc">
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@foreach (var message in Messages)
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{
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<li>@message</li>
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}
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</ul>
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</DAlert>
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}
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@code {
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[CascadingParameter] EditContext EditContext { get; set; }
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[Parameter] public string ContainerClass { get; set; }
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[Parameter] public ErrorViewerSeverity Severity { get; set; }
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[Parameter] public string AdditionalError { get; set; }
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[Parameter] public IEnumerable<string> AdditionalErrors { get; set; } = [];
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EditContext subscribedEditContext;
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IEnumerable<string> Messages =>
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(EditContext?.GetValidationMessages() ?? [])
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.Append(AdditionalError)
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.Concat(AdditionalErrors)
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.Where(message => !string.IsNullOrEmpty(message));
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bool HasContent => Messages.Any();
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static string Cx(params string[] classes) => DCx.Join(classes);
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protected override void OnParametersSet()
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{
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if (EditContext == subscribedEditContext)
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return;
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Unsubscribe();
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subscribedEditContext = EditContext;
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if (subscribedEditContext is not null)
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subscribedEditContext.OnValidationStateChanged += OnValidationStateChanged;
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}
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void OnValidationStateChanged(object sender, ValidationStateChangedEventArgs e) => _ = InvokeAsync(StateHasChanged);
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void Unsubscribe()
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{
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if (subscribedEditContext is not null)
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subscribedEditContext.OnValidationStateChanged -= OnValidationStateChanged;
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}
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public void Dispose() => Unsubscribe();
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}
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