or
3 answers
76 views
Hey,
I'm having a problem with auto complete control for Maui (this is Windows desktop app). In our app we have a view caching system which basically makes it a SPA application (what we do is we change the Contnet property dynamically of the container that should contain our views). The problem is as follows. Whenever we navigate between any view and back to the view where autocomplete resides, the keyboard navigation is treated as if it was attached once more (that's my assumption) - meaning that when we did one cycle of navigation (go to another view and back), trigger auto completion and press arrow down on keyboard it jumps two records down instead of one. The problem is incremental so when we do for example 4 cycles of navigation and press arrow down key, we jump 4 items down and the 4th item is highlighted.
Unfortunately i cannot provide more than the control initialization.
I'm having a problem with auto complete control for Maui (this is Windows desktop app). In our app we have a view caching system which basically makes it a SPA application (what we do is we change the Contnet property dynamically of the container that should contain our views). The problem is as follows. Whenever we navigate between any view and back to the view where autocomplete resides, the keyboard navigation is treated as if it was attached once more (that's my assumption) - meaning that when we did one cycle of navigation (go to another view and back), trigger auto completion and press arrow down on keyboard it jumps two records down instead of one. The problem is incremental so when we do for example 4 cycles of navigation and press arrow down key, we jump 4 items down and the 4th item is highlighted.
var autoCompleteEntry = new RadAutoComplete
{
BindingContext = _viewModel,
Placeholder = $"Szukaj {field.Label}...",
FontSize = 16,
TextColor = NeucaColors.Font_CardFrame,
BackgroundColor = Colors.White,
CompletionMode = AutoCompleteCompletionMode.Contains,
SuggestMode = AutoCompleteSuggestMode.Suggest,
NoResultsMessage = $"Brak wyników dla {field.Label}",
SearchThreshold = 3,
};
autoCompleteEntry.SetBinding(RadAutoComplete.TextProperty, new Binding(
nameof(UIFieldConfig.FilterValue),
source: field,
mode: BindingMode.TwoWay
));
autoCompleteEntry.HighlightItemFunc = (filteredItems, searchText) => null;
autoCompleteEntry.TextChanged += AutoCompleteEntryOnTextChanged(field.FieldName);
autoCompleteEntry.Completed +=
dataGridContext == UIDataGridContext.Account
? AccountOnAutoCompleteEntryCompleted
: ClientOnAutoCompleteEntryCompleted;
autoCompleteEntry.SuggestionItemSelected +=
dataGridContext == UIDataGridContext.Account
? AccountOnAutoCompleteEntryOnSuggestionItemSelected
: ClientOnAutoCompleteEntryOnSuggestionItemSelected;
autoCompleteEntry.SetBinding(WidthRequestProperty, new Binding(
nameof(AccountsClientsViewModel.IsEditMode),
source: _viewModel,
converter: new BoolToObjectConverter { TrueObject = 250, FalseObject = 300 }
));
dataRow.Children.Add(autoCompleteEntry);
Unfortunately i cannot provide more than the control initialization.
Didi
Telerik team
answered
on
19 Jun 2026
1 answer
48 views
Hi,
I'm trying to prevent ComboBox from growing as i select more items. Basically what i want to achieve is transition to ShowMoreTemplate when items don't fit in the view and I'm still focused in the control and also have the ClearButton displayed.
I'm ataching two screenshots. The one named ExpectedResult is my goal when control is focused and items don't fit in the view and the dropdown is opened. Also there should be ClearButton displayed to the left of blue arrow.
I'm trying to prevent ComboBox from growing as i select more items. Basically what i want to achieve is transition to ShowMoreTemplate when items don't fit in the view and I'm still focused in the control and also have the ClearButton displayed.
I'm ataching two screenshots. The one named ExpectedResult is my goal when control is focused and items don't fit in the view and the dropdown is opened. Also there should be ClearButton displayed to the left of blue arrow.
Didi
Telerik team
answered
on
15 Jun 2026
1 answer
67 views
Hi,
I'm trying to achieve the same styling for RadAutoComplete and RadEntry. However there's a mismatch between ClearButton padding/margin or overall how it is placed.
Firstly when i try raw controlls without styles whatsover, there's noticeable difference between AutoComplete ClearButton size and RadEntry ClearButton size.
Getting the size of two icons to be the same is fairly easy reffering to the documentation however i cannot get them to display in the same place. RadEntry's icon is slightly offset to the right as if inner container had different values or something. I tried resetting margin and padding with styles as well as in the control itself.
I'm also attaching screenshots. You can see the difference there.
var radComplete = new RadAutoComplete
{
Placeholder = "Search ...",
TextColor = Colors.Black,
BackgroundColor = Colors.White,
CompletionMode = AutoCompleteCompletionMode.Contains,
SuggestMode = AutoCompleteSuggestMode.Suggest,
NoResultsMessage = "No matches ..",
SearchThreshold = 3,
ItemsSource = new List<string>
{
"Apple", "Apple1", "Apple2", "Apple3", "Apple4", "Apple5", "Banana", "Cherry", "Date", "Elderberry"
},
ClearButtonStyle = new Style(typeof(RadTemplatedButton))
{
Setters =
{
// new Setter
// {
// Property = RadTemplatedButton.PaddingProperty,
// Value = 0
// },
// new Setter
// {
// Property = RadTemplatedButton.MarginProperty,
// Value = 0
// },
new Setter
{
Property = RadTemplatedButton.BackgroundColorProperty,
Value = Colors.Red
},
new Setter
{
Property = VisualStateManager.VisualStateGroupsProperty,
Value = new VisualStateGroupList
{
new VisualStateGroup
{
Name = "CommonStates",
States =
{
new VisualState { Name = "Normal" },
}
}
}
},
}
},
TextInputStyle = new Style(typeof(RadTextInput))
{
Setters =
{
new Setter { Property = RadTextInput.MinimumHeightRequestProperty, Value = 44 },
new Setter { Property = RadTextInput.MaximumHeightRequestProperty, Value = 44 }
}
}
};
var radEntry = new RadEntry
{
Placeholder = "Search ...",
TextColor = Colors.Black,
BackgroundColor = Colors.White,
HeightRequest = 44,
ClearButtonStyle = new Style(typeof(RadTemplatedButton))
{
Setters =
{
// new Setter
// {
// Property = RadTemplatedButton.PaddingProperty,
// Value = 0
// },
// new Setter
// {
// Property = RadTemplatedButton.MarginProperty,
// Value = 0
// },
new Setter
{
Property = RadTemplatedButton.BackgroundColorProperty,
Value = Colors.Red
},
new Setter
{
Property = VisualStateManager.VisualStateGroupsProperty,
Value = new VisualStateGroupList
{
new VisualStateGroup
{
Name = "CommonStates",
States =
{
new VisualState { Name = "Normal" },
}
}
}
},
}
},
Style = new Style(typeof(RadEntry))
{
Setters =
{
new Setter
{
Property = VisualStateManager.VisualStateGroupsProperty,
Value = new VisualStateGroupList
{
new VisualStateGroup
{
Name = "CommonStates",
States =
{
new VisualState { Name = "Normal" },
}
}
}
},
}
}
};
Didi
Telerik team
answered
on
15 Jun 2026
1 answer
62 views
Any plans to start supporting Apple's Liquid Glass like some of your competitors?
Didi
Telerik team
answered
on
09 Jun 2026
1 answer
71 views
Hello!
We have recently updated our MAUI app from Telerik 13.2 to the latest 14 version. After the update, our Android app would crash on startup.
Our logs suggested the issue came from the RadSpinnerResourceDictionary class, specifically the setting the TextColorProperty now calls resourceExtension.ProvideValue() method which expects the value of the key added in the constructor:
public RadSpinnerResourceDictionary()
{
this.Add("SpinnerSelectedTextColor", (object) Application.AccentColor);
this.InitializeComponent();
}We do not set this value, and the value is nullable.
In our Styles.xml we have a custom style for the RadListPicker. The app crashes if we leave that set, and does not if we comment out the style. However, the app experiences a weird behavior afterwards, where native controls (buttons, pickers) do not render correctly or at all.
Here is the log we have:
System.NullReferenceException: Object reference not set to an instance of an object.
at object StaticResourceExtension.CastTo(object value, object targetProperty)() in StaticResourceExtension.cs:line 62
at object StaticResourceExtension.ProvideValue(IServiceProvider serviceProvider)() in StaticResourceExtension.cs:line 53
at void RadSpinnerResourceDictionary.InitializeComponent()()
at new RadSpinnerResourceDictionary()()
at static RadSpinner()()
System.TypeInitializationException: The type initializer for 'Telerik.Maui.Controls.RadSpinner' threw an exception.
at void RadPickersResources.InitializeComponent()()
at new RadPickersResources()()
at RadPickersResources RadPickersResources.get_Resources()()
at object RadPickersResources.GetResource(string resourceKey)()
at Style RadPickersResources.get_PickerContentViewHeaderLabelStyle()()
at static PickerPopupSettings()()
System.TypeInitializationException: The type initializer for 'Telerik.Maui.Controls.PickerPopupSettings' threw an exception.
at object MethodBaseInvoker.InterpretedInvoke_Constructor(object obj, IntPtr* args)() in MethodBaseInvoker.Mono.cs:line 32
at object MethodBaseInvoker.InvokeWithNoArgs(object obj, BindingFlags invokeAttr)() in MethodBaseInvoker.cs:line 57
System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation.
at object MethodBaseInvoker.InvokeWithNoArgs(object obj, BindingFlags invokeAttr)() in MethodBaseInvoker.cs:line 61
at object RuntimeType.CreateInstanceMono(bool nonPublic, bool wrapExceptions)() in RuntimeType.Mono.cs:line 1825
at object RuntimeType.CreateInstanceDefaultCtor(bool publicOnly, bool wrapExceptions)() in RuntimeType.Mono.cs:line 1627
at object Activator.CreateInstance(Type type, bool nonPublic, bool wrapExceptions) x 3() in Activator.RuntimeType.cs:line 97
at void CreateValuesVisitor.Visit(ElementNode node, INode parentNode)() in CreateValuesVisitor.cs:line 113
at void ElementNode.Accept(IXamlNodeVisitor visitor, INode parentNode)() in XamlNode.cs:line 142
at void ElementNode.Accept(IXamlNodeVisitor visitor, INode parentNode) x 2() in XamlNode.cs:line 138
at void RootNode.Accept(IXamlNodeVisitor visitor, INode parentNode)() in XamlNode.cs:line 194
at void XamlLoader.Visit(RootNode rootnode, HydrationContext visitorContext, bool useDesignProperties)() in XamlLoader.cs:line 233
at void XamlLoader.Load(object view, string xaml, Assembly rootAssembly, bool useDesignProperties)() in XamlLoader.cs:line 103
at void XamlLoader.Load(object view, string xaml, bool useDesignProperties)() in XamlLoader.cs:line 57
at void XamlLoader.Load(object view, Type callingType)() in XamlLoader.cs:line 53
at __TypeAC55B29C835AE2FB Extensions.LoadFromXaml<__TypeAC55B29C835AE2FB>(__TypeAC55B29C835AE2FB view, Type callingType)() in ViewExtensions.cs:line 52
at void __TypeAC55B29C835AE2FB.InitializeComponent()() in obj/Debug/net10.0-android/android-arm64/Microsoft.Maui.Controls.SourceGen/Microsoft.Maui.Controls.SourceGen.XamlGenerator/Resources_Styles_Styles.xaml.sg.cs:line 24
at new __TypeAC55B29C835AE2FB()() in obj/Debug/net10.0-android/android-arm64/Microsoft.Maui.Controls.SourceGen/Microsoft.Maui.Controls.SourceGen.XamlGenerator/Resources_Styles_Styles.xaml.sg.cs:line 18
at object MethodBaseInvoker.InterpretedInvoke_Constructor(object obj, IntPtr* args)() in MethodBaseInvoker.Mono.cs:line 32
at object MethodBaseInvoker.InvokeWithNoArgs(object obj, BindingFlags invokeAttr)() in MethodBaseInvoker.cs:line 57
at ResourceDictionary ResourceDictionary.GetOrCreateInstance(Type type)+(Type _) => { }() in ResourceDictionary.cs:line 95
at ResourceDictionary ConditionalWeakTable<Type, ResourceDictionary>.GetValue(Type key, CreateValueCallback createValueCallback)() in ConditionalWeakTable.cs:line 314
at ResourceDictionary ResourceDictionary.GetOrCreateInstance(Type type)() in ResourceDictionary.cs:line 87
at void ResourceDictionaryHelpers.SetAndLoadSource(ResourceDictionary rd, Uri value, string resourcePath, Assembly assembly, IXmlLineInfo lineInfo)() in ResourceDictionaryHelpers.cs:line 42
at void ResourceDictionaryHelpers.LoadFromSource(ResourceDictionary rd, string value, Type rootType, IXmlLineInfo lineInfo)() in ResourceDictionaryHelpers.cs:line 35
at void ApplyPropertiesVisitor.SetPropertyValue(object xamlelement, XmlName propertyName, object value, object rootElement, INode node, HydrationContext context, IXmlLineInfo lineInfo)() in ApplyPropertiesVisitor.cs:line 372
at void ApplyPropertiesVisitor.Visit(ValueNode node, INode parentNode)() in ApplyPropertiesVisitor.cs:line 70
at void ValueNode.Accept(IXamlNodeVisitor visitor, INode parentNode)() in XamlNode.cs:line 61
at void ElementNode.Accept(IXamlNodeVisitor visitor, INode parentNode)() in XamlNode.cs:line 136
at void FillResourceDictionariesVisitor.Visit(ElementNode node, INode parentNode)() in FillResourceDictionariesVisitor.cs:line 66
at void ElementNode.Accept(IXamlNodeVisitor visitor, INode parentNode)() in XamlNode.cs:line 131
at void ListNode.Accept(IXamlNodeVisitor visitor, INode parentNode)() in XamlNode.cs:line 212
at void ElementNode.Accept(IXamlNodeVisitor visitor, INode parentNode)() in XamlNode.cs:line 136
at void RootNode.Accept(IXamlNodeVisitor visitor, INode parentNode)() in XamlNode.cs:line 192
at void XamlLoader.Visit(RootNode rootnode, HydrationContext visitorContext, bool useDesignProperties)() in XamlLoader.cs:line 236
at void XamlLoader.Load(object view, string xaml, Assembly rootAssembly, bool useDesignProperties)() in XamlLoader.cs:line 103
at void XamlLoader.Load(object view, string xaml, bool useDesignProperties)() in XamlLoader.cs:line 57
at void XamlLoader.Load(object view, Type callingType)() in XamlLoader.cs:line 53
at App Extensions.LoadFromXaml<App>(App view, Type callingType)() in ViewExtensions.cs:line 52
at void App.InitializeComponent()() in obj/Debug/net10.0-android/android-arm64/Microsoft.Maui.Controls.SourceGen/Microsoft.Maui.Controls.SourceGen.XamlGenerator/App.xaml.sg.cs:line 20
at new App()() in App.xaml.cs:line 247
at object MethodBaseInvoker.InterpretedInvoke_Constructor(object obj, IntPtr* args)() in MethodBaseInvoker.Mono.cs:line 32
at object MethodBaseInvoker.InvokeWithNoArgs(object obj, BindingFlags invokeAttr)() in MethodBaseInvoker.cs:line 57
at object RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr, Binder binder, object[] parameters, CultureInfo culture)() in RuntimeConstructorInfo.cs:line 155
at object CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, RuntimeResolverContext context)() in CallSiteRuntimeResolver.cs:line 69
at object CallSiteVisitor<RuntimeResolverContext, object>.VisitCallSiteMain(ServiceCallSite callSite, RuntimeResolverContext argument)() in CallSiteVisitor.cs:line 48
at object CallSiteRuntimeResolver.VisitRootCache(ServiceCallSite callSite, RuntimeResolverContext context)() in CallSiteRuntimeResolver.cs:line 92
at object CallSiteVisitor<RuntimeResolverContext, object>.VisitCallSite(ServiceCallSite callSite, RuntimeResolverContext argument)() in CallSiteVisitor.cs:line 27
at object CallSiteRuntimeResolver.Resolve(ServiceCallSite callSite, ServiceProviderEngineScope scope)() in CallSiteRuntimeResolver.cs:line 30
at ServiceAccessor ServiceProvider.CreateServiceAccessor(ServiceIdentifier serviceIdentifier)() in ServiceProvider.cs:line 251
at ServiceAccessor ConcurrentDictionary<ServiceIdentifier, ServiceAccessor>.GetOrAdd(ServiceIdentifier key, Func<ServiceIdentifier, ServiceAccessor> valueFactory)() in ConcurrentDictionary.cs:line 1201
at object ServiceProvider.GetService(ServiceIdentifier serviceIdentifier, ServiceProviderEngineScope serviceProviderEngineScope) x 2() in ServiceProvider.cs:line 211
at object WrappedServiceProvider.GetService(Type serviceType) x 2() in MauiContext.cs:line 87
at IApplication ServiceProviderServiceExtensions.GetService<IApplication>(IServiceProvider provider)() in ServiceProviderServiceExtensions.cs:line 25
at void SentryMauiAppBuilderExtensions.HandleMauiEvents(IPlatformApplication platformApplication, bool bind)() in SentryMauiAppBuilderExtensions.cs:line 158
at void <>c.<RegisterMauiEventsBinder>b__3_2(?)+(Application application) => { }() in SentryMauiAppBuilderExtensions.cs:line 134
at void MauiApplication.OnCreate()+(OnApplicationCreating del) => { }() in MauiApplication.cs:line 44
at void LifecycleEventServiceExtensions.InvokeLifecycleEvents<OnApplicationCreating>(IServiceProvider services, Action<OnApplicationCreating> action)() in LifecycleEventServiceExtensions.cs:line 31
at void MauiApplication.OnCreate()() in MauiApplication.cs:line 44
at void Application.n_OnCreate(IntPtr jnienv, IntPtr native__this)()Setting the Application.AccentColor in App.xaml.cs before InitializeComponent(); seems to fix the issue.
If the previous behavior is expected to change, this should be marked as a breaking change.
Didi
Telerik team
answered
on
04 Jun 2026
1 answer
92 views
I have a button that users can click to clear the filters on a RadDataGrid using datagrid.FilterDescriptors.Clear()
This clears the filters on the grid, however if I look at a column that was previously filtered, I see the previous settings. How do I reset the filter settings on the columns?
Didi
Telerik team
answered
on
28 Apr 2026
1 answer
103 views
Hi All
Was hoping if anybody can give their input on a problem I'm having.
I have some sort of VMS in Maui made using libVLC
But I have ran into issues increasing stream count.
Up to 24 streams no issues, but as soon as the 25th stream hits my CPU load spikes like crazy.
I go from like 15% CPU load to 70%.
I have done something similar in WPF which went fine on even 66 streams. I know WPF is not the same but libvlc isn't the issue.
Small sidenote a made a test in WinUI3 40 streams loaded fine with only 15% CPU load.
Does anybody know how valid the below is?
Each MAUI VideoView creates its own SwapChainPanel = its own DXGI swap chain. 28 streams = 28 swap chains feeding
the WinUI DirectComposition compositor, which chokes past ~25. WPF doesn't have this problem because it uses a
single shared D3DImage surface — one compositor target for all streams.
Switch LibVLC from the built-in VideoView (one SwapChainPanel each) to callback rendering (SetVideoFormat +
SetVideoCallbacks), then composite all streams into 1–4 shared SwapChainPanels as tiles. Same RTSP URLs, same HW
decode, same FPS/resolution. Just one compositor target instead of 30.
Thanks
Didi
Telerik team
answered
on
21 Apr 2026
1 answer
88 views
I need to add a small label in the center of a donut chart like the one that follows
<telerik:RadPieChart>
<telerik:RadPieChart.Series>
<telerik:DonutSeries ShowLabels="True"
RadiusFactor="0.7"
InnerRadiusFactor="0.8"
ValueBinding="Value"
ItemsSource="{Binding Data}" />
</telerik:RadPieChart.Series>
</telerik:RadPieChart>
As you can see from the code above there is enough UI space in the center of the donut chart (RadiusFactor = 0.7 & InnerRadiusFactor = 0.8) to draw a label. However I cannot find any solution from the official docs to do this.
I can try to add a label in z-index over the control using this
<Grid>
<telerik:RadPieChart>
<telerik:RadPieChart.Series>
<telerik:DonutSeries ShowLabels="True"
RadiusFactor="0.7"
InnerRadiusFactor="0.8"
ValueBinding="Value"
ItemsSource="{Binding Data}" />
</telerik:RadPieChart.Series>
</telerik:RadPieChart>
<Grid Padding="30" BackgroundColor="Green">
<Label Text="75%" />
</Grid>
</Grid>
but I must do UI changes in order to center the label both vertically and horizontally.
Didi
Telerik team
answered
on
14 Apr 2026
1 answer
100 views
I am using a telerik:RadNavigationView, that has by default a hamburger button, which when clicked opens/closes the left panel. Can I add an additional button right to this hamburger menu in the header (in the same line/parallel to the hamburger menu), that behaves like the hamburger menu (means when the left panel closes this button should remain visible - like the original hamburger menu).
Thanks in advance
Thanks in advance
Didi
Telerik team
answered
on
16 Mar 2026
1 answer
88 views
I've tried all kinds of things but can't seem to figure out how to control the item separator appearance on iOS. On Windows it doesn't appear (which is what I want) but on iOS a thin line always appears. I need it gone.
<telerik:RadCollectionView
Margin="0,0,0,0"
BackgroundColor="Black"
HeightRequest="200"
ItemsSource="{Binding CompanyContacts}"
SelectionMode="None">
<telerik:RadCollectionViewItemView>
<telerik:RadCollectionViewItemView.Resources>
<Style TargetType="telerik:RadCollectionViewItemView">
<Setter Property="BackgroundColor" Value="Black" />
<Setter Property="BorderColor" Value="Black" />
<Setter Property="CornerRadius" Value="0" />
<Setter Property="Padding" Value="0" />
<Setter Property="Margin" Value="0" />
<Setter Property="BorderThickness" Value="0" />
</Style>
</telerik:RadCollectionViewItemView.Resources>
</telerik:RadCollectionViewItemView>
<telerik:RadCollectionView.ItemTemplate>
<DataTemplate x:DataType="m:CompanyContactModel">
<StackLayout
Margin="10,10,10,0"
HorizontalOptions="Fill"
Orientation="Vertical">
<StackLayout
Margin="0,10,0,0"
HorizontalOptions="Fill"
Orientation="Horizontal">
<Label
Margin="0,12,0,0"
Style="{StaticResource OrangeLabelStyle}"
Text="{Binding FullName}" />
<Label
Margin="0,12,0,0"
Style="{StaticResource WhiteLabelStyle}"
Text=" - ">
<Label.Triggers>
<DataTrigger
Binding="{Binding Position}"
TargetType="Label"
Value="{x:Null}">
<Setter Property="IsVisible" Value="False" />
</DataTrigger>
<DataTrigger
Binding="{Binding Position}"
TargetType="Label"
Value="">
<Setter Property="IsVisible" Value="False" />
</DataTrigger>
</Label.Triggers>
</Label>
<Label
Margin="0,12,0,0"
Style="{StaticResource WhiteLabelStyle}"
Text="{Binding Position}"
TextColor="{StaticResource WhiteTextColor}" />
</StackLayout>
<HorizontalStackLayout Margin="0,5,0,0" Spacing="10">
<telerik:RadCheckBox
IsChecked="{Binding IsEmailed, Mode=TwoWay}"
VerticalOptions="Center"
Color="{StaticResource WhiteTextColor}" />
<telerik:RadEntry Text="{Binding EmailAddress, Mode=TwoWay}" WidthRequest="250" VerticalOptions="Center" />
</HorizontalStackLayout>
</StackLayout>
</DataTemplate>
</telerik:RadCollectionView.ItemTemplate>
</telerik:RadCollectionView>
Didi
Telerik team
answered
on
06 Mar 2026
