Gorilla SDK not showing data when bound to a ItemsSource Bindable Property

[npagare]

Hello, In the Gorilla mode, I don't see ListView rendereing data that is bound to a ItemsSource bindable property defined in the code behind of a user control (implemented as a ContentView).

Your help in addressing this issue will be appreciated.

My XAML User Control (say myUserControl.xaml) is made up of ContentView has a ListView. In the code behind I have declared the ItemsSource Property as a bindable property, as shown below. // BINDABLE PROPERTY ItemSource : Used to pass set of data items depending on the category of the data elements public static readonly BindableProperty ItemsSourceProperty = BindableProperty.Create("ItemsSource", typeof(IEnumerable), typeof(myUserControl));

    public IEnumerable ItemsSource
    {
        get
        {
            return (IEnumerable)GetValue(ItemsSourceProperty);
        }
        set
        {
            SetValue(ItemsSourceProperty, value);
        }
    }

In the myUserControl.xaml - I have defined ListView as

<ContentView.Content>
    <ListView
        CachingStrategy="RecycleElement"
        HasUnevenRows="true"
        ItemSelected="OnItemSelected"
        ItemsSource="{Binding ItemsSource, Source={x:Reference Name=x_this}}"
        SeparatorVisibility="None">
        <ListView.ItemTemplate>
            <DataTemplate>
                <ViewCell>
                             ……...
               </ViewCell>
            </DataTemplate>
        </ListView.ItemTemplate>
    </ListView>

This usercontrol is referenced in another ContentView (say parentContentView.xaml) as shown below

When I tried to browse the parentContentView.xaml in the iOS simulator, it dosen's show up any data. Any thoughts to address this issue ?

Thanks,

[npagare]

TestData currently defined under @Global.

As a result, I also tried setting the BindingContext of my userControl in two was as shown below; still it is not working.

Method 1

Method 2

"{Binding TestData}" What’s the name of the viewmodel / class and its namespace that holds mashalled data from DesignTimeData.json file? I can try using that as the BindingConext value.

[npagare]

Can someone please respond ?

[LeoHere]

@IoTFier Design time data should be defined in the DesignTimeData.json. You associate the data to a given page by defining a property with the name of the XAML page you want to attach the data to. See this wiki entry for more information.

Please notice that any logic/code you define in the code behind will not be executed by Gorilla.

If you are still having issues, please create a tiny XF project where the problem is illustrated.

[npagare]

Hi @LeoHere , my sample data is in the DesignTimeData.json. In this case I have defined 4-5 json data (sets) under @ Global My goal is to provide different set of data by name as declared under @ global in side each instance of the controlview template that contains my listview having the bindable itemsource property.

So, as example if I have TestData1, TestData2, TestData3 defined under @ global then, the binding will look like below; but I don't know how to specify the BindingContext in this case. That's because Gorilla is having a viewmodel internally which looks like builds a data collection at runtime from all the JSON data defined in the DesignTimeData.json. I would like to provide the name of that viewmodel from Gorilla loaded at runtime in the bindingcontext below.

Method 1

Is there a new update on the Goriall Dev version?

Thanks

[npagare]

Hi @LeoHere, I am still waiting for your input. Also, is there a new dev version of the Gorilla SDK/player that you can share with me?

Thanks

[LeoHere]

@IoTFier the binding context is implicitly set for you by Gorilla. If you have 3 collections in @Global, as you described, you should be able to access them as bellow.

<userControl:myUserControl ItemsSource="{Binding TestData1}"  />
<userControl:myUserControl ItemsSource="{Binding TestData2}" />
<userControl:myUserControl ItemsSource="{Binding TestData3}" />

Those collections are merged with the design time data you defined for you page (in case you did that), so they became available as collections in you current binding context.

[npagare]

Hi @LeoHere , this approach doesn't work when I have a listview with a ItemSource defined as a bindable property defined in the code. Please take a look at my original request in this issue.

Thanks