protected async Task HandleOnChanged(UIChangeEventArgs e)
{
if (IsMultiple)
{
// when multiple selection is enabled we need to use javascript to get the list of selected items
internalMultiValue = await JSRunner.GetSelectedOptions <TValue>(ElementId);
// changed event must be called before validation
await SelectedValuesChanged.InvokeAsync(internalMultiValue);
ParentValidation?.UpdateInputValue(internalMultiValue);
}
else
{
if (Converters.TryChangeType <TValue>(e.Value, out var value))
{
internalValue = value;
}
else
{
internalValue = default;
}
// changed event must be called before validation
await SelectedValueChanged.InvokeAsync(internalValue);
ParentValidation?.UpdateInputValue(internalValue);
}
}
protected override async Task <ParseValue <IReadOnlyList <TValue> > > ParseValueFromStringAsync(string value)
{
if (string.IsNullOrEmpty(value))
{
return(ParseValue <IReadOnlyList <TValue> > .Empty);
}
if (Multiple)
{
// when multiple selection is enabled we need to use javascript to get the list of selected items
var multipleValues = await JSRunner.GetSelectedOptions <TValue>(ElementId);
return(new ParseValue <IReadOnlyList <TValue> >(true, multipleValues, null));
}
else
{
if (Converters.TryChangeType <TValue>(value, out var result))
{
return(new ParseValue <IReadOnlyList <TValue> >(true, new TValue[] { result }, null));
}
else
{
return(ParseValue <IReadOnlyList <TValue> > .Empty);
}
}
}
