Warnings

[Daniel]

Hi,

I get these warnings, do I miss something?

2022-04-18 17:28:44,692 [1] WARN Microsoft.Maui.Controls.Xaml.Diagnostics.BindingDiagnostics - 'Content' property not found on 'Telerik.XamarinForms.Primitives.BusyContentPresenter', target property: 'Microsoft.Maui.Controls.ContentPresenter.Content'
2022-04-18 17:28:44,692 [1] WARN Microsoft.Maui.Controls.Xaml.Diagnostics.BindingDiagnostics - 'Content' property not found on 'Telerik.XamarinForms.Primitives.BusyContentPresenter', target property: 'Microsoft.Maui.Controls.ContentPresenter.Content'
2022-04-18 17:28:50,247 [1] WARN Microsoft.Maui.Controls.Xaml.Diagnostics.BindingDiagnostics - 'RoutesSource' property not found on 'AutomationClient.MAUI.ViewModels.RoutesViewModel', target property: 'Telerik.XamarinForms.DataGrid.RadDataGrid.ItemsSource'
2022-04-18 17:28:53,358 [1] WARN Microsoft.Maui.Controls.BindableObject - Cannot convert 2 to type 'Telerik.XamarinForms.Input.BorderStyle'
2022-04-18 17:29:28,361 [1] WARN Microsoft.Maui.Controls.Xaml.Diagnostics.BindingDiagnostics - 'Content' property not found on 'Telerik.XamarinForms.Primitives.BusyContentPresenter', target property: 'Microsoft.Maui.Controls.ContentPresenter.Content'
2022-04-18 17:29:28,362 [1] WARN Microsoft.Maui.Controls.Xaml.Diagnostics.BindingDiagnostics - 'Content' property not found on 'Telerik.XamarinForms.Primitives.BusyContentPresenter', target property: 'Microsoft.Maui.Controls.ContentPresenter.Content'
2022-04-18 17:29:54,510 [1] WARN Microsoft.Maui.Controls.Style - Style TargetType Telerik.XamarinForms.Input.PickerPopupContentView is not compatible with element target type Telerik.XamarinForms.Input.PickerDropDownContentView
2022-04-18 17:30:04,937 [1] WARN Microsoft.Maui.Controls.Xaml.Diagnostics.BindingDiagnostics - 'RoutesSource' property not found on 'AutomationClient.MAUI.ViewModels.RoutesViewModel', target property: 'Telerik.XamarinForms.DataGrid.RadDataGrid.ItemsSource'
2022-04-18 17:30:05,001 [1] WARN Microsoft.Maui.Controls.Xaml.Diagnostics.BindingDiagnostics - 'RoutesSource' property not found on 'AutomationClient.MAUI.ViewModels.RoutesViewModel', target property: 'Telerik.XamarinForms.DataGrid.RadDataGrid.ItemsSource'
2022-04-18 17:30:07,182 [1] WARN Microsoft.Maui.Controls.BindableObject - Cannot convert 2 to type 'Telerik.XamarinForms.Input.BorderStyle'
2022-04-18 17:30:13,386 [1] WARN Microsoft.Maui.Controls.Style - Style TargetType Telerik.XamarinForms.Input.PickerPopupContentView is not compatible with element target type Telerik.XamarinForms.Input.PickerDropDownContentView
2022-04-18 17:30:45,607 [1] WARN Microsoft.Maui.Controls.Xaml.Diagnostics.BindingDiagnostics - 'Content' property not found on 'Telerik.XamarinForms.Primitives.BusyContentPresenter', target property: 'Microsoft.Maui.Controls.ContentPresenter.Content'
2022-04-18 17:30:45,607 [1] WARN Microsoft.Maui.Controls.Xaml.Diagnostics.BindingDiagnostics - 'Content' property not found on 'Telerik.XamarinForms.Primitives.BusyContentPresenter', target property: 'Microsoft.Maui.Controls.ContentPresenter.Content'
2022-04-18 17:30:52,438 [1] WARN Microsoft.Maui.Controls.Xaml.Diagnostics.BindingDiagnostics - 'RoutesSource' property not found on 'AutomationClient.MAUI.ViewModels.RoutesViewModel', target property: 'Telerik.XamarinForms.DataGrid.RadDataGrid.ItemsSource'
2022-04-18 17:30:52,557 [1] WARN Microsoft.Maui.Controls.Xaml.Diagnostics.BindingDiagnostics - 'RoutesSource' property not found on 'AutomationClient.MAUI.ViewModels.RoutesViewModel', target property: 'Telerik.XamarinForms.DataGrid.RadDataGrid.ItemsSource'
2022-04-18 18:02:28,858 [1] WARN Microsoft.Maui.Dispatching.Dispatcher - Replaced an existing DispatcherProvider with one from the service provider

[JP]

I am getting same warning too, any thoughs?

[Lance | Senior Manager Technical Support]

Hi Juan, we've already helped Daniel with this, but I'm seeing we did not post a public answer. So I have replied here again to share the information, please scroll down and see my answer.

[Lance | Senior Manager Technical Support]

Hello Daniel and JP,

You can ignore these warnings, they're coming from the Xaml Binding Diagnostics panel and not your actual build output. I can 100% confirm these warnings pointing to the Telerik controls are false flags and can be ignored

The reason they happen is because there are still some issues with in the Xaml Binding Diagnostics tool's ability to detect all compatible options in .NET MAUI.

For example, the scanner doesn't know how to wait for updated BindingContext that gets set at runtime, so it warns you just in case. this is the source of the warning that you're seeing.

As an example to explain, let's say you have a ListView on the page, the page's BindingContext is of type "MainViewModel". The ListView shows items of type "Person"... but you will get a "WARN PersonAge does not exist in MainViewModel"... this is a false warning.

<ContentPage>
    <ContentPage.BindingContext>
        <MainViewModel />
    </ContentPage.BindingContext>
    
    <ListView ItemsSource="{Binding People}">
        <ListView.ItemTemplate>
            <DataTemplate>
            <!-- WARNING will be incorrectly shown for this, it will say "PersonAge does not exist on MainViewModel"... but that is incorrect because the BindingContext is a Person NOT the MainViewModel  -->
                <Label Text="{Binding PersonAge}" />
            </DataTemplate>
        </ListView.ItemTemplate>
    </ListView>
</ContentPage>

If you want to remove these, you can create a custom logger and ignore anything coming from the Microsoft.Maui.Controls.Xaml.Diagnostics.BindingDiagnostics namespace.

Regards,
Lance | Manager Technical Support
Progress Telerik