Cardview: Cannot set initial position via SelectedItem binding

[jorgvanriet]

Hi Andrei,

I am using the 'CoverFlowView' and when i bind the ItemSource and set the SelectedItem to the last item in the list, it keeps resetting the SelectedItem to the first item in the list.

Any tips?

Regards,

Jorg

[AndreiMisiukevich]

Hi @jorgvanriet could you please share your xaml?

[jorgvanriet]

<panCardView:CoverFlowView 
x:Name="CoverFlowView1" 
ItemsSource="{Binding Path=BindingContext.ProgressList, Source={x:Reference Name=DevelopmentViewName}}" 
VerticalOptions="FillAndExpand" 
IsCyclical="False" 
SelectedItem="{Binding Path=BindingContext.SelectedItem, Source={x:Reference Name=DevelopmentViewName}, Mode=OneWay}">

        <panCardView:CoverFlowView.ItemTemplate>
            <DataTemplate>
                <StackLayout VerticalOptions="FillAndExpand" Padding="20">
                    <Label Text="{Binding Title}" Style="{StaticResource LabelPinkLarge}" />
                    <Label Text="{Binding Week, StringFormat='Week {0}'}" Style="{StaticResource LabelPink}" />
                    <Label Text="{Binding Message}" Style="{StaticResource LabelBlack}" />
                </StackLayout>

            </DataTemplate>
        </panCardView:CoverFlowView.ItemTemplate>

    </panCardView:CoverFlowView>

[jorgvanriet]

Sorry quotes are messing it up

[AndreiMisiukevich]

Mode=OneWay

I presume should be a default (two-way, cuz you want to keep it updated in case of any swipes)

[AndreiMisiukevich]

SelectedItem="{Binding Path=BindingContext.SelectedItem, Source={x:Reference Name=DevelopmentViewName}}"

[jorgvanriet]

It's not the OneWay that was just something i tried sorry

[AndreiMisiukevich]

@jorgvanriet so, what is the issue?
You cannot select initial item with SelectedItem property, right? But then it works, yep?

[jorgvanriet]

Yes, unable to set the initial item.

[AndreiMisiukevich]

@jorgvanriet thx, I'll take a look on my sample )

[AndreiMisiukevich]

    <cards:CarouselView 
        ItemsSource="{Binding Items}"
        SelectedItem="{Binding CurrentItem}">

        <cards:CarouselView.ItemTemplate>
            <DataTemplate>
                <ContentView>
                </ContentView>
            </DataTemplate>
        </cards:CarouselView.ItemTemplate>
    </cards:CarouselView>

Works fine for me

[AndreiMisiukevich]

[AndreiMisiukevich]

try to build a small sample

[AndreiMisiukevich]

btw there is SelectedIndex property if you want to use index instead of an item

[jorgvanriet]

Andrei,

I am using the CoverFlowView and your example is the CarouselView.
When i use the SelectedIndex instead of the SelectedItem it works fine.

When i use the SelectedItem is does not work.

[AndreiMisiukevich]

@jorgvanriet can I reproduce this issue on my CoverFlowView sample?

[jorgvanriet]

You mean you can reproduce or you cannot?

[AndreiMisiukevich]

@jorgvanriet sorry. It was a question :) Is it possible to reproduce this issue on my sample? Are you able to do it?

[jorgvanriet]

As a work around i am now binding to the SelectedIndex where i am setting the SelectedItem (i need it for the information it holds)

I will try to reproduce it.

[jorgvanriet]

It works with the simple version
I have no idea what the difference is between SelectedIndex and SelectedItem
And no clue why 'SelectedIndex' works and 'SelectedItem' doesn't

Tnx for the help

[AndreiMisiukevich]

@jorgvanriet can you build a sample that represents this issue?

[AndreiMisiukevich]

Seems I've fixed it

[AndreiMisiukevich]

@jorgvanriet I will create a release on this/next week :) if it's not super urgent for you

[jorgvanriet]

Tnx alot Andrei !
I will be looking forward to the update :)

[jorgvanriet]

Just to let you know it works like a charm!
Tnx for the quick response!

[AndreiMisiukevich]

@jorgvanriet thanks for the feedback :)