On Page#1, i have a collectionview with text/string items list. If you tap aa item, it will get the current tapped text/string and send to Page#2. sound simple
issue I am having: if you tap on item#1, then it will send item#1 to page2, this part working fine. But on page#2, if you hit back button, and tap on item#1 again.. than nothing happens, it doesnt go to page#2
Fix: i think i need to somehow clear tap selection, and than send the item to page#2. but im not sure how to do this
On Page#1, i have a simple collectionview. Collection view contains text/string list
<CollectionView ItemsSource="{Binding MyListItem}"
SelectionMode="Single"
SelectionChanged="CollectionView_SelectionChanged">
<CollectionView.ItemTemplate>
<DataTemplate>
<ContentView>
<!-- Body -->
<Grid Padding="0">
<Frame CornerRadius="3" BorderColor="#f2f4f5" HasShadow="True">
<StackLayout Orientation="Horizontal">
<Image Source="icon_about"
WidthRequest="25" />
<StackLayout VerticalOptions="Center">
<Label VerticalOptions="Center"
FontSize="16"
Text="{Binding .}" />
</StackLayout>
</StackLayout>
</Frame>
back end code to handle selection is:
private async void CollectionView_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
var previous = e.PreviousSelection.FirstOrDefault();
var current = e.CurrentSelection.FirstOrDefault();
var route = $"{ nameof(Page2) }?URLCardType={current}";
await Shell.Current.GoToAsync(route);
//clear selection
((CollectionView)sender).SelectedItem = null;
}
Update ((CollectionView)sender).SelectedItem = null;
fixed the issue of clearing selected item but CollectionView_SelectionChanged
method is get run twice on single tap. why? this is all the code i have
@jason thanks, this worked for me. i just had to check if selection item is null than do nothing
private async void CollectionView_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
var MyCollectionView = sender as CollectionView;
if (MyCollectionView.SelectedItem == null)
return;
var previous = e.PreviousSelection.FirstOrDefault();
var current = e.CurrentSelection.FirstOrDefault();
var route = $"{ nameof(Page2) }?URLCardType={current}";
await Shell.Current.GoToAsync(route);
//clear selection
MyCollectionView.SelectedItem = null;
}
Here is a simple solution that worked for me. Setting to null did not do the trick, it was causing all kinds of weird stuff.
private void CollectionView_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
var itemselected = e.CurrentSelection[0] as ProductsItem;
if (itemselected != null)
Shell.Current.GoToAsync(nameof(SelectedProductPage));
//Setting the selected item to an emptyviewproperty after navigation
CollectionList.SelectedItem = SelectableItemsView.EmptyViewProperty;
}
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