CollectionView disabling scrolling in Xamarin forms

Question

I am trying to disable scrolling in my collection view. The reason why I want to do that is there is a scroll view already in my XAML code. When I try to scroll all page elements on the page, collection view elements are also scrolled themselves but I don't want that.

 <ScrollView>
        <StackLayout  Padding="20" Spacing="20" >
            <Frame CornerRadius="15" 
                   BackgroundColor="#A6EDB3" 
                   VerticalOptions="StartAndExpand"
                   HeightRequest="200" 
                   IsClippedToBounds="True"
                   Padding="0"   >
                <StackLayout Padding="10,5,10,5"   
                             Orientation="Horizontal"   >
                    <Image Source="settingsIcon"  
                               HeightRequest="25" 
                               WidthRequest="25" 
                               Aspect="Fill" />
                    <Label Text="Filter" 
                               FontSize="Medium" 
                               VerticalTextAlignment="Center" 
                               VerticalOptions="Center"/>
                </StackLayout>
            </Frame>
            <Label Text="Vocabulary topics" TextColor="black" FontSize="20" FontAttributes="Bold" ></Label>
            <CollectionView    x:Name="topics" Scrolled="topics_Scrolled" VerticalScrollBarVisibility="Never" >
                <CollectionView.ItemTemplate>
                    <DataTemplate>
                        <StackLayout Padding="0,10,0,10">
                            <Frame HasShadow="False"
                                       HeightRequest="60"
                                       CornerRadius="15" 
                                       BackgroundColor="{Binding BackgroundColor}" 
                                       HorizontalOptions="Fill" >
                                <StackLayout Orientation="Horizontal">
                                    <Frame BackgroundColor="{Binding BoxColor}" WidthRequest="40" ></Frame>
                                    <StackLayout>
                                        <Label Text="{Binding Name}"></Label>
                                    </StackLayout>
                                </StackLayout>
                            </Frame>
                        </StackLayout>
                    </DataTemplate>
                </CollectionView.ItemTemplate>
            </CollectionView>
        </StackLayout>
    </ScrollView>

Answer 1

Having two scrolls on the same page is not the correct way.

Also if you just want to place items above/below your collectionView use the Header/Footer properties then!!

For instance, for the current design, your CollectionView could look something like below and work as you want it to.

 <CollectionView   Padding="20"  x:Name="topics" Scrolled="topics_Scrolled" VerticalScrollBarVisibility="Never" >
            <CollectionView.Header>
              <StackLayout  Spacing="20" >
        <Frame CornerRadius="15" 
               BackgroundColor="#A6EDB3" 
               VerticalOptions="StartAndExpand"
               HeightRequest="200" 
               IsClippedToBounds="True"
               Padding="0"   >
            <StackLayout Padding="10,5,10,5"   
                         Orientation="Horizontal"   >
                <Image Source="settingsIcon"  
                           HeightRequest="25" 
                           WidthRequest="25" 
                           Aspect="Fill" />
                <Label Text="Filter" 
                           FontSize="Medium" 
                           VerticalTextAlignment="Center" 
                           VerticalOptions="Center"/>
            </StackLayout>
        </Frame>
        <Label Text="Vocabulary topics" TextColor="black" FontSize="20" FontAttributes="Bold" ></Label>
        </StackLayout>
            </CollectionView.Header>
            <CollectionView.ItemTemplate>
                <DataTemplate>
                    <StackLayout Padding="0,10,0,10">
                        <Frame HasShadow="False"
                                   HeightRequest="60"
                                   CornerRadius="15" 
                                   BackgroundColor="{Binding BackgroundColor}" 
                                   HorizontalOptions="Fill" >
                            <StackLayout Orientation="Horizontal">
                                <Frame BackgroundColor="{Binding BoxColor}" WidthRequest="40" ></Frame>
                                <StackLayout>
                                    <Label Text="{Binding Name}"></Label>
                                </StackLayout>
                            </StackLayout>
                        </Frame>
                    </StackLayout>
                </DataTemplate>
            </CollectionView.ItemTemplate>
        </CollectionView>

Note: you might have to adjust the margin and padding properties for it to look the exact same. My code is just an example.

For more information on CollectionView check: https://learn.microsoft.com/en-us/xamarin/xamarin-forms/user-interface/collectionview/