Как очистить выбор в CollectionView, нажав «ОК» в DisplayAlert? ⇐ Android

[Anonymous]

**Привет всем. Я пытаюсь очистить выбор в CollectionView после нажатия «ОК» в DisplayAlert, но мне не удалось этого добиться. Вот мой исходный код (regci — моя база данных):
**
private void collectionView_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
var itemSelected = e.CurrentSelection[0] as regci;
if (itemSelected != null)
DisplayAlert($"{itemSelected.Cliente} {"-"} {itemSelected.Equipo}",
Environment.NewLine + $"{"Rpm del motor: "}{itemSelected.Motor} {" rpm"}" + Environment.NewLine + Environment.NewLine +
$"{"Diámetro de polea motriz: "}{itemSelected.Motriz} {" in"}" + Environment.NewLine + Environment.NewLine +
$"{"Diámetro de polea conducida: "}{itemSelected.Condu} {" in"}" + Environment.NewLine + Environment.NewLine +
$"{"Amplitud: "}{itemSelected.Amp} {" in"}" + Environment.NewLine + Environment.NewLine +
$"{"Frecuencia del sistema: "}{itemSelected.Frec}{" rpm"}" + Environment.NewLine + Environment.NewLine +
$"{"Fuerza G: "}{itemSelected.FG}" + Environment.NewLine, "OK", "-")

return;

}```

**Then I changed my code to this: **


private async void collectionView_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
var itemSelected = e.CurrentSelection[0] as regci;
var res = await DisplayAlert($"{itemSelected.Cliente} {"-"} {itemSelected.Equipo}",
Environment.NewLine + $"{"Rpm del motor: "}{itemSelected.Motor} {" rpm"}" + Environment.NewLine + Environment.NewLine +
$"{"Diámetro de polea motriz: "}{itemSelected.Motriz} {" in"}" + Environment.NewLine + Environment.NewLine +
$"{"Diámetro de polea conducida: "}{itemSelected.Condu} {" in"}" + Environment.NewLine + Environment.NewLine +
$"{"Amplitud: "}{itemSelected.Amp} {" in"}" + Environment.NewLine + Environment.NewLine +
$"{"Frecuencia del sistema: "}{itemSelected.Frec}{" rpm"}" + Environment.NewLine + Environment.NewLine +
$"{"Fuerza G: "}{itemSelected.FG}" + Environment.NewLine, "OK", "-");
if (res == true)
{
collectionView.SelectedItems.Clear();
}

}


**But when I click on "OK" the message** *"Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index"* **shows up**

**Hope someone can help me **


Подробнее здесь: https://stackoverflow.com/questions/792 ... splayalert