i have a radsidedrwaer and i get System.ArgumentNullException: 'Value cannot be null. (Parameter 'view')' get
on app center i get
ElementExtensions.ToHandler (IElement view, IMauiContext context) D:\a\_work\1\s\src\Core\src\Platform\ElementExtensions.cs:58
ElementExtensions.ToPlatform (IElement view, IMauiContext context) D:\a\_work\1\s\src\Core\src\Platform\ElementExtensions.cs:127
Telerik.Maui.RadSideDrawerExtensions.UpdateDrawerContent(RadSideDrawer nativeSideDrawer, IRadSideDrawer sideDrawer)
Telerik.Maui.Handlers.RadSideDrawerHandler.MapDrawerContent(RadSideDrawerHandler handler, IRadSideDrawer virtualElement)
PublicKeyToken=5803cfa389c90ce7]].<Add>b__0 (IElementHandler h, IElement v) D:\a\_work\1\s\src\Core\src\PropertyMapper.cs:172
PropertyMapper.UpdatePropertyCore (String key, IElementHandler viewHandler, IElement virtualView) D:\a\_work\1\s\src\Core\src\PropertyMapper.cs:47
PropertyMapper.UpdateProperties (IElementHandler viewHandler, IElement virtualView) D:\a\_work\1\s\src\Core\src\PropertyMapper.cs:82
ElementHandler.SetVirtualView (IElement view) D:\a\_work\1\s\src\Core\src\Handlers\Element\ElementHandler.cs:79
PublicKeyToken=5803cfa389c90ce7]].SetVirtualView (IView view) D:\a\_work\1\s\src\Core\src\Handlers\View\ViewHandlerOfT.cs:53
PublicKeyToken=5803cfa389c90ce7]].SetVirtualView (IElement view) D:\a\_work\1\s\src\Core\src\Handlers\View\ViewHandlerOfT.cs:56
Element.SetHandler (IElementHandler newHandler) D:\a\_work\1\s\src\Controls\src\Core\Element\Element.cs:921
Element.set_Handler (IElementHandler value) D:\a\_work\1\s\src\Controls\src\Core\Element\Element.cs:863
IElement.set_Handler (IElementHandler value) D:\a\_work\1\s\src\Controls\src\Core\VisualElement\VisualElement.cs:2031
ElementExtensions.ToHandler (IElement view, IMauiContext context) D:\a\_work\1\s\src\Core\src\Platform\ElementExtensions.cs:96
ElementExtensions.ToPlatform (IElement view, IMauiContext context) D:\a\_work\1\s\src\Core\src\Platform\ElementExtensions.cs:127
LayoutHandler.SetVirtualView (IView view) D:\a\_work\1\s\src\Core\src\Handlers\Layout\LayoutHandler.Android.cs:41
PublicKeyToken=null]].SetVirtualView (IElement view) D:\a\_work\1\s\src\Core\src\Handlers\View\ViewHandlerOfT.cs:56
Element.SetHandler (IElementHandler newHandler) D:\a\_work\1\s\src\Controls\src\Core\Element\Element.cs:921
Element.set_Handler (IElementHandler value) D:\a\_work\1\s\src\Controls\src\Core\Element\Element.cs:863
IElement.set_Handler (IElementHandler value) D:\a\_work\1\s\src\Controls\src\Core\VisualElement\VisualElement.cs:2031
ElementExtensions.ToHandler (IElement view, IMauiContext context) D:\a\_work\1\s\src\Core\src\Platform\ElementExtensions.cs:96
ElementExtensions.ToPlatform (IElement view, IMauiContext context) D:\a\_work\1\s\src\Core\src\Platform\ElementExtensions.cs:127
ContentViewHandler.UpdateContent (IContentViewHandler handler) D:\a\_work\1\s\src\Core\src\Handlers\ContentView\ContentViewHandler.Android.cs:42
ContentViewHandler.MapContent (IContentViewHandler handler, IContentView page) D:\a\_work\1\s\src\Core\src\Handlers\ContentView\ContentViewHandler.Android.cs:47
PublicKeyToken=null]].<Add>b__0 (IElementHandler h, IElement v) D:\a\_work\1\s\src\Core\src\PropertyMapper.cs:172
PropertyMapper.UpdatePropertyCore (String key, IElementHandler viewHandler, IElement virtualView) D:\a\_work\1\s\src\Core\src\PropertyMapper.cs:47
PropertyMapper.UpdateProperties (IElementHandler viewHandler, IElement virtualView) D:\a\_work\1\s\src\Core\src\PropertyMapper.cs:82
ElementHandler.SetVirtualView (IElement view) D:\a\_work\1\s\src\Core\src\Handlers\Element\ElementHandler.cs:79
PublicKeyToken=null]].SetVirtualView (IView view) D:\a\_work\1\s\src\Core\src\Handlers\View\ViewHandlerOfT.cs:53
ContentViewHandler.SetVirtualView (IView view) D:\a\_work\1\s\src\Core\src\Handlers\ContentView\ContentViewHandler.Android.cs:26
PublicKeyToken=null]].SetVirtualView (IElement view) D:\a\_work\1\s\src\Core\src\Handlers\View\ViewHandlerOfT.cs:56
Element.SetHandler (IElementHandler newHandler) D:\a\_work\1\s\src\Controls\src\Core\Element\Element.cs:921
Element.set_Handler (IElementHandler value) D:\a\_work\1\s\src\Controls\src\Core\Element\Element.cs:863
IElement.set_Handler (IElementHandler value) D:\a\_work\1\s\src\Controls\src\Core\VisualElement\VisualElement.cs:2031
ElementExtensions.ToHandler (IElement view, IMauiContext context) D:\a\_work\1\s\src\Core\src\Platform\ElementExtensions.cs:96
ElementExtensions.ToPlatform (IElement view, IMauiContext context) D:\a\_work\1\s\src\Core\src\Platform\ElementExtensions.cs:127
MauiContextExtensions.ToPlatform (IView view, IMauiContext fragmentMauiContext, Context context, LayoutInflater layoutInflater, FragmentManager childFragmentManager) D:\a\_work\1\s\src\Core\src\Platform\Android\MauiContextExtensions.cs:96
NavigationViewFragment.OnCreateView (LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) D:\a\_work\1\s\src\Core\src\Platform\Android\Navigation\NavigationViewFragment.cs:56
Fragment.n_OnCreateView_Landroid_view_LayoutInflater_Landroid_view_ViewGroup_Landroid_os_Bundle_ (IntPtr jnienv, IntPtr native__this, IntPtr native_inflater, IntPtr native_container, IntPtr native_savedInstanceState) C:\a\_work\1\s\generated\androidx.fragment.fragment\obj\Release\net6.0-android\generated\src\AndroidX.Fragment.App.Fragment.cs:2031
JNINativeWrapper.Wrap_JniMarshal_PPLLL_L (_JniMarshal_PPLLL_L callback, IntPtr jnienv, IntPtr klazz, IntPtr p0, IntPtr p1, IntPtr p2) /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Android.Runtime/JNINativeWrapper.g.cs:367
The sidedrawer:
<Grid> <telerik:RadSideDrawer x:Name="drawer" DrawerLength="250"> <telerik:RadSideDrawer.MainContent> <tools:KeyboardView> <AbsoluteLayout x:Name="mainLayout"> <StackLayout x:Name="mainStackLayout" AbsoluteLayout.LayoutFlags="All" AbsoluteLayout.LayoutBounds="0, 0, 1, 1" Spacing="0"> <StackLayout Orientation="Horizontal" HorizontalOptions="FillAndExpand" HeightRequest="50"> <Grid Style="{StaticResource BottomGrid}" > <Grid.RowDefinitions> <RowDefinition Height="50"/> </Grid.RowDefinitions> <Grid.ColumnDefinitions> <ColumnDefinition Width="70*" /> <ColumnDefinition Width="15*" /> <ColumnDefinition Width="15*" /> </Grid.ColumnDefinitions> <StackLayout Grid.Row="0" Grid.Column="0" Margin="-10, 0, 0, 0"> <SearchBar x:Name="SearchBox" TextChanged="SearchBox_TextChanged" SearchButtonPressed="SearchBox_SearchButtonPressed" Style="{StaticResource SearchBar}" /> </StackLayout> <StackLayout Grid.Row="0" Grid.Column="1"> <Button x:Name="BtnTopologies" Grid.Row="0" Grid.Column="1" Style="{StaticResource Icon}" ImageSource="TreeView.png" Clicked="BtnTopologies_Clicked"/> </StackLayout> <StackLayout Grid.Row="0" Grid.Column="2"> <Image Source="barcodeBtn.png"> <Image.GestureRecognizers> <TapGestureRecognizer Tapped="BtnBarcode_Clicked" NumberOfTapsRequired="1" /> </Image.GestureRecognizers> </Image> </StackLayout> </Grid> </StackLayout> <StackLayout Orientation="Horizontal"> <telerik:RadComboBox x:Name="sortByField" IsClearButtonVisible="False" SelectionChanged="sortByField_SelectionChanged" VerticalOptions="Center" WidthRequest="150" TextColor="{StaticResource LightBlueColor}"/> <Image x:Name="sortingImg" Source="arrow.png"> <Image.GestureRecognizers> <TapGestureRecognizer Tapped="OrderTapped" NumberOfTapsRequired="1" /> </Image.GestureRecognizers> </Image> </StackLayout> <StackLayout x:Name="listViewDynamic"> </StackLayout> <telerik:RadListView x:Name="AssetsList" Grid.Row="1" SelectionMode="Single" SelectionGesture="Tap" SwipeOffset="50, 0, 50, 0" SwipeThreshold="10" HeightRequest="30" SelectionChanged="AssetsList_ItemTapped" RefreshRequested="AssetsList_RefreshRequested" IsPullToRefreshActive="True" IsPullToRefreshEnabled="True" VerticalOptions="FillAndExpand" BackgroundColor="LightGray" > <telerik:RadListView.ItemStyle> <telerik:ListViewItemStyle BackgroundColor="Transparent" BorderColor="Transparent" BorderLocation="None" BorderWidth="0"/> </telerik:RadListView.ItemStyle> <telerik:RadListView.ItemTemplate > <DataTemplate> <telerik:ListViewTemplateCell > <telerik:ListViewTemplateCell.View> <telerik:RadBorder BorderColor="#268ecd" Margin="3,6" BorderThickness="0" CornerRadius="18" > <StackLayout Orientation="Horizontal" Style="{StaticResource ListItem}" VerticalOptions="Start" Padding="0" BackgroundColor="White"> <StackLayout Orientation="Vertical" HorizontalOptions="FillAndExpand" Spacing="0" Padding="10, 15, 0, 15"> <StackLayout Orientation="Vertical" HorizontalOptions="StartAndExpand" Spacing="5"> <Label Text="{Binding Code}" Style="{StaticResource ListHeader}" TextColor="{StaticResource BlueColor}" /> <Label Text="{Binding Description}" Style="{StaticResource ListInfo}" TextColor="{StaticResource LightBlueColor}" /> <Label MaxLines="2" LineBreakMode="TailTruncation" Text="{Binding FullPath}" Style="{StaticResource ListInfo}" TextColor="{StaticResource LightGreyColor}" /> </StackLayout> </StackLayout> </StackLayout> </telerik:RadBorder> </telerik:ListViewTemplateCell.View> </telerik:ListViewTemplateCell> </DataTemplate> </telerik:RadListView.ItemTemplate> </telerik:RadListView> </StackLayout> </AbsoluteLayout> </tools:KeyboardView> </telerik:RadSideDrawer.MainContent> </telerik:RadSideDrawer> </Grid>
Hi Ioannis,
Thank you for sharing the code, it was of much help.
The reason for the exception is the fact the SideDrawer does not have DrawerContent - in general, SideDrawer control consists of MainContent and DrawerContent as the drawer is initially hidden.
Do you at some point ( later or in code-behind) add a DrawerContent in the concrete scenario? I am asking as I'd like to log this as a bug report and I'd need to understand the exact use case you have.
Looking forward to your reply.