This is in a Maui Embedded Project.  Other Telerik Controls are working. 

Xaml:

<telerik:RadComboBox AutomationId="staticItemsComboBox">
    <telerik:RadComboBox.ItemsSource>
        <x:Array Type="{x:Type x:String}">
            <x:String>USA</x:String>
            <x:String>Uganda</x:String>
            <x:String>Ukraine</x:String>
            <x:String>Canada</x:String>
            <x:String>France</x:String>
            <x:String>Italy</x:String>
            <x:String>United Kingdom</x:String>
            <x:String>China</x:String>
            <x:String>Japan</x:String>
        </x:Array>
    </telerik:RadComboBox.ItemsSource>
</telerik:RadComboBox>

StackTrace:

System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.
 ---> System.TypeInitializationException: The type initializer for 'Telerik.Maui.Controls.RadComboBox' threw an exception.
 ---> System.TypeInitializationException: The type initializer for 'Telerik.Maui.Controls.ComboBoxConstants' threw an exception.
 ---> System.NullReferenceException: Object reference not set to an instance of an object.
   at Telerik.Maui.Controls.ComboBoxConstants..cctor()
   --- End of inner exception stack trace ---
   at Telerik.Maui.Controls.RadComboBox..cctor()
   --- End of inner exception stack trace ---
   at System.Reflection.ConstructorInvoker.InterpretedInvoke(Object obj, Span`1 args, BindingFlags invokeAttr)
   --- End of inner exception stack trace ---
   at System.RuntimeType.CreateInstanceMono(Boolean nonPublic, Boolean wrapExceptions)
   at System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean wrapExceptions)
   at System.Activator.CreateInstance(Type type, Boolean nonPublic, Boolean wrapExceptions)
   at System.Activator.CreateInstance(Type type, Boolean nonPublic)
   at System.Activator.CreateInstance(Type type)
   at Microsoft.Maui.Controls.Xaml.CreateValuesVisitor.Visit(ElementNode node, INode parentNode) in D:\a\_work\1\s\src\Controls\src\Xaml\CreateValuesVisitor.cs:line 102
   at Microsoft.Maui.Controls.Xaml.ElementNode.Accept(IXamlNodeVisitor visitor, INode parentNode) in D:\a\_work\1\s\src\Controls\src\Xaml\XamlNode.cs:line 159
   at Microsoft.Maui.Controls.Xaml.ElementNode.Accept(IXamlNodeVisitor visitor, INode parentNode) in D:\a\_work\1\s\src\Controls\src\Xaml\XamlNode.cs:line 155
   at Microsoft.Maui.Controls.Xaml.ElementNode.Accept(IXamlNodeVisitor visitor, INode parentNode) in D:\a\_work\1\s\src\Controls\src\Xaml\XamlNode.cs:line 155
   at Microsoft.Maui.Controls.Xaml.RootNode.Accept(IXamlNodeVisitor visitor, INode parentNode) in D:\a\_work\1\s\src\Controls\src\Xaml\XamlNode.cs:line 212
   at Microsoft.Maui.Controls.Xaml.XamlLoader.Visit(RootNode rootnode, HydrationContext visitorContext, Boolean useDesignProperties) in D:\a\_work\1\s\src\Controls\src\Xaml\XamlLoader.cs:line 207
   at Microsoft.Maui.Controls.Xaml.XamlLoader.Load(Object view, String xaml, Assembly rootAssembly, Boolean useDesignProperties) in D:\a\_work\1\s\src\Controls\src\Xaml\XamlLoader.cs:line 78
   at Microsoft.Maui.Controls.Xaml.XamlLoader.Load(Object view, String xaml, Boolean useDesignProperties) in D:\a\_work\1\s\src\Controls\src\Xaml\XamlLoader.cs:line 53
   at Microsoft.Maui.Controls.Xaml.XamlLoader.Load(Object view, Type callingType) in D:\a\_work\1\s\src\Controls\src\Xaml\XamlLoader.cs:line 49
   at Microsoft.Maui.Controls.Xaml.Extensions.LoadFromXaml[StopList](StopList view, Type callingType) in D:\a\_work\1\s\src\Controls\src\Xaml\ViewExtensions.cs:line 37
   at TransportACE_Maui.Source.UI.StopList.InitializeComponent() in C:\apacheta_git\TransportACE_HME\TransportACE_Maui\Microsoft.Maui.Controls.SourceGen\Microsoft.Maui.Controls.SourceGen.CodeBehindGenerator\Source_Views_StopList.xaml.sg.cs:line 26
   at TransportACE_Maui.Source.UI.StopList..ctor(StopListViewModel viewModel) in C:\apacheta_git\TransportACE_HME\TransportACE_Maui\Source\Views\StopList.xaml.cs:line 13
   at System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, RuntimeResolverContext context)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2[[Microsoft.Extensions.DependencyInjection.ServiceLookup.RuntimeResolverContext, Microsoft.Extensions.DependencyInjection, Version=7.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60],[System.Object, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].VisitCallSiteMain(ServiceCallSite callSite, RuntimeResolverContext argument)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitDisposeCache(ServiceCallSite transientCallSite, RuntimeResolverContext context)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2[[Microsoft.Extensions.DependencyInjection.ServiceLookup.RuntimeResolverContext, Microsoft.Extensions.DependencyInjection, Version=7.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60],[System.Object, System.Private.CoreLib, Version=7.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e]].VisitCallSite(ServiceCallSite callSite, RuntimeResolverContext argument)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.Resolve(ServiceCallSite callSite, ServiceProviderEngineScope scope)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.RuntimeServiceProviderEngine.<>c__DisplayClass4_0.<RealizeService>b__0(ServiceProviderEngineScope scope)
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type serviceType, ServiceProviderEngineScope serviceProviderEngineScope)
   at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type serviceType)
   at Microsoft.Maui.MauiContext.WrappedServiceProvider.GetService(Type serviceType) in D:\a\_work\1\s\src\Core\src\MauiContext.cs:line 68
   at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetService[StopList](IServiceProvider provider)
   at TransportACE.Droid.StopsListMaui.OnCreate(Bundle bundle) in C:\apacheta_git\TransportACE_HME\TransportACE_Maui\Platforms\Android\Source\UITasks\StopsListMaui.cs:line 199

Hi Team,

any suggestion for me if I want to make Telerik popup like the following way: modal popup and wait for user input, then do next step based on user choose?

Unable to set selected item text propery from viewmodel unless IsEditable="True" but not IsEditable="{Binding boolvar}"

The below code will show the text property but editable. How to make the combo box non-editable and programmatically set the selected item and selected text

                <telerik:RadComboBox  x:Name="MAccountHead" DisplayMemberPath="{Binding SelectedType.TypeDesc, Mode=TwoWay}"  SelectedItem="{Binding SelectedType, Mode=TwoWay}"
                                   HighlightTextColor="Blue" ItemsSource="{Binding Typ}" Text="{Binding SelectedType.TypeDesc, Mode=TwoWay}"
                                HeightRequest="45"  PlaceholderColor="LightGray" Placeholder="Main Head"
                                  Grid.Row="4" Grid.Column="1" BorderThickness="0,0,0,1"  IsEditable="True">
                    <telerik:RadComboBox.Triggers>
                        <DataTrigger TargetType="telerik:RadComboBox"
                                 Binding="{Binding FormVal.TypeErrorVisible}"
                                 Value="true">
                            <Setter Property="BackgroundColor" Value="Bisque"/>
                        </DataTrigger>
                    </telerik:RadComboBox.Triggers>
                </telerik:RadComboBox>

Hello,

I seem to be having an issue with the Telerik .NET MAUI SideDrawer control. I can see the MainContent view, however, I have no means to open the DrawerContent.

Below is my ContentPage markup and a screenshot of the result.

Is my markup correct? Is it just my device causing the issue?

ContentPage Markup

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="SynergyMobile4.Views.TestReport.TR_Index"
             xmlns:telerik="http://schemas.telerik.com/2022/xaml/maui"
             xmlns:tr="clr-namespace:SynergyMobile4.ViewModels.TestReport"
             Title="Test Report">
    <VerticalStackLayout>

        <telerik:RadSideDrawer x:Name="drawer" 
                                DrawerLength="200">
            <telerik:RadSideDrawer.MainContent>
                <Label Text="Main content" />
            </telerik:RadSideDrawer.MainContent>
            <telerik:RadSideDrawer.DrawerContent>
                <VerticalStackLayout Spacing="10"
                                    BackgroundColor="Red"
                                        Padding="10, 10, 0, 0">
                    <Button Text="Mail" />
                    <Button Text="Calendar" />
                    <Button Text="People" />
                    <Button Text="Tasks" />
                </VerticalStackLayout>
            </telerik:RadSideDrawer.DrawerContent>
        </telerik:RadSideDrawer>
    </VerticalStackLayout>

</ContentPage>

Result (screenshot from Galaxy S22 physical device)

Edit:

If I hardcode the [IsOpen] property to "True" in the XAML, the drawer opens and I can see the items, but I still have no button or control to open it naturally.

Hello, 

is there possibility to use telerik maui controls with material design?

thanks in advance

I have just implemented a MAUI ContentPage with an completely empty RadDataGrid definition.  In my "using" section of the xaml page, I have this entry:

xmlns:dataGrid="http://schemas.telerik.com/2022/xaml/maui"

In the root grid, I have this entry:

<dataGrid:RadDataGrid
	Grid.Row="1">
</dataGrid:RadDataGrid>

When the application is run, I get the following XAML binding errors:

NotificationsViewModel	ActualWidth	RadBorder.MinimumWidthRequest	Double	'ActualWidth' property not found on 'MobyClient.ViewModels.NotificationsViewModel', target property: 'Telerik.Maui.Controls.RadBorder.MinimumWidthRequest'
NotificationsViewModel	HeaderText	Label.Text				String	'HeaderText' property not found on 'MobyClient.ViewModels.NotificationsViewModel', target property: 'Microsoft.Maui.Controls.Label.Text'			

A key point is that when I added 'ActualWidth' and 'HeaderText' observable properties, the errors go away. In fact, when I run the Telerik MAUI code examples, I see the same errors in the examples "First Look" data grid example:

Telerik.Maui.Controls.Compatibility.DataControlsRenderer.UWP.ExtendedListViewItem	HandleIconPath	Microsoft.UI.Xaml.Controls.BitmapIcon.UriSource, Name='PART_ReorderHandle'	Uri	BindingExpression path error: 'HandleIconPath' property not found on 'Telerik.Maui.Controls.Compatibility.DataControlsRenderer.UWP.ExtendedListViewItem'			
FirstLookViewModel	ActualWidth	RadBorder.MinimumWidthRequest	Double	'ActualWidth' property not found on 'QSF.Examples.DataGridControl.FirstLookExample.FirstLookViewModel', target property: 'Telerik.Maui.Controls.RadBorder.MinimumWidthRequest'			
FirstLookViewModel	HeaderText	Label.Text				String	'HeaderText' property not found on 'QSF.Examples.DataGridControl.FirstLookExample.FirstLookViewModel', target property: 'Microsoft.Maui.Controls.Label.Text'

I may be missing it, but is GridLines documented? It took me quite a while to figure out how to turn off the white lines between rows (WinUI). Was this recently added? Anyway,

        <Setter Property="GridLinesVisibility" Value="None" />

is what I needed. Thanks.

It doesn't seem this is possible, correct? Could it be added as a feature request?

For example, I may want to use the footer row as a type of status message and would like to have the entire grid width to work with.

Thanks,

-ldl-