maui: Microsoft.Maui.Platform.HandlerNotFoundException : Handler not found for view Microsoft.Maui.Controls.Maps.Map.

I have below code in my NewPage1.xaml

<?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"
             xmlns:test="clr-namespace:Microsoft.Maui.Maps;assembly=Microsoft.Maui.Maps"
             x:Class="MauiApp1_Sample.NewPage1"
             Title="NewPage1"
             xmlns:maps="clr-namespace:Microsoft.Maui.Controls.Maps;assembly=Microsoft.Maui.Controls.Maps"
             xmlns:sensors="clr-namespace:Microsoft.Maui.Devices.Sensors;assembly=Microsoft.Maui.Essentials">
    <VerticalStackLayout>
        <Label 
            Text="Welcome to .NET MAUI! New Page 1"
            VerticalOptions="Center" 
            HorizontalOptions="Center" />

        <Button
                x:Name="btnNewPage2"
                Text="Open New Page 2"
                SemanticProperties.Hint="Counts the number of times you click"
                Clicked="btnNewPage2_Clicked"
                HorizontalOptions="Center" />

        <maps:Map>
            <x:Arguments>
                <test:MapSpan>
                    <x:Arguments>
                        <sensors:Location>
                            <x:Arguments>
                                <x:Double>36.9628066</x:Double>
                                <x:Double>-122.0194722</x:Double>
                            </x:Arguments>
                        </sensors:Location>
                        <x:Double>0.01</x:Double>
                        <x:Double>0.01</x:Double>
                    </x:Arguments>
                </test:MapSpan>
            </x:Arguments>
        </maps:Map>
    </VerticalStackLayout>
</ContentPage>

When I am trying to run my application its throwing below error,

Microsoft.Maui.Platform.HandlerNotFoundException
  Message=Handler not found for view Microsoft.Maui.Controls.Maps.Map.
  Source=Microsoft.Maui
  StackTrace:
   at Microsoft.Maui.Platform.ElementExtensions.ToHandler(IElement view, IMauiContext context) in D:\a\_work\1\s\src\Core\src\Platform\ElementExtensions.cs:line 92
   at Microsoft.Maui.Platform.ElementExtensions.ToPlatform(IElement view, IMauiContext context) in D:\a\_work\1\s\src\Core\src\Platform\ElementExtensions.cs:line 127
   at Microsoft.Maui.Handlers.LayoutHandler.SetVirtualView(IView view) in D:\a\_work\1\s\src\Core\src\Handlers\Layout\LayoutHandler.Android.cs:line 43
   at Microsoft.Maui.Handlers.ViewHandler`2[[Microsoft.Maui.ILayout, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[Microsoft.Maui.Platform.LayoutViewGroup, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].SetVirtualView(IElement view) in D:\a\_work\1\s\src\Core\src\Handlers\View\ViewHandlerOfT.cs:line 56
   at Microsoft.Maui.Controls.Element.SetHandler(IElementHandler newHandler) in D:\a\_work\1\s\src\Controls\src\Core\HandlerImpl\Element\Element.Impl.cs:line 63
   at Microsoft.Maui.Controls.Element.set_Handler(IElementHandler value) in D:\a\_work\1\s\src\Controls\src\Core\HandlerImpl\Element\Element.Impl.cs:line 19
   at Microsoft.Maui.Controls.VisualElement.Microsoft.Maui.IElement.set_Handler(IElementHandler value) in D:\a\_work\1\s\src\Controls\src\Core\HandlerImpl\VisualElement\VisualElement.Impl.cs:line 294
   at Microsoft.Maui.Platform.ElementExtensions.ToHandler(IElement view, IMauiContext context) in D:\a\_work\1\s\src\Core\src\Platform\ElementExtensions.cs:line 96
   at Microsoft.Maui.Platform.ElementExtensions.ToPlatform(IElement view, IMauiContext context) in D:\a\_work\1\s\src\Core\src\Platform\ElementExtensions.cs:line 127
   at Microsoft.Maui.Handlers.ContentViewHandler.UpdateContent(IContentViewHandler handler) in D:\a\_work\1\s\src\Core\src\Handlers\ContentView\ContentViewHandler.Android.cs:line 44
   at Microsoft.Maui.Handlers.ContentViewHandler.MapContent(IContentViewHandler handler, IContentView page) in D:\a\_work\1\s\src\Core\src\Handlers\ContentView\ContentViewHandler.Android.cs:line 49
   at Microsoft.Maui.PropertyMapper`2.<>c__DisplayClass5_0[[Microsoft.Maui.IContentView, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[Microsoft.Maui.Handlers.IContentViewHandler, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].<Add>b__0(IElementHandler h, IElement v) in D:\a\_work\1\s\src\Core\src\PropertyMapper.cs:line 183
   at Microsoft.Maui.PropertyMapper.UpdatePropertyCore(String key, IElementHandler viewHandler, IElement virtualView) in D:\a\_work\1\s\src\Core\src\PropertyMapper.cs:line 47
   at Microsoft.Maui.PropertyMapper.UpdateProperties(IElementHandler viewHandler, IElement virtualView) in D:\a\_work\1\s\src\Core\src\PropertyMapper.cs:line 82
   at Microsoft.Maui.Handlers.ElementHandler.SetVirtualView(IElement view) in D:\a\_work\1\s\src\Core\src\Handlers\Element\ElementHandler.cs:line 74
   at Microsoft.Maui.Handlers.ViewHandler.SetVirtualView(IElement element) in D:\a\_work\1\s\src\Core\src\Handlers\View\ViewHandler.cs:line 125
   at Microsoft.Maui.Handlers.ViewHandler`2[[Microsoft.Maui.IContentView, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[Microsoft.Maui.Platform.ContentViewGroup, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].SetVirtualView(IView view) in D:\a\_work\1\s\src\Core\src\Handlers\View\ViewHandlerOfT.cs:line 53
   at Microsoft.Maui.Handlers.ContentViewHandler.SetVirtualView(IView view) in D:\a\_work\1\s\src\Core\src\Handlers\ContentView\ContentViewHandler.Android.cs:line 27
   at Microsoft.Maui.Handlers.ViewHandler`2[[Microsoft.Maui.IContentView, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null],[Microsoft.Maui.Platform.ContentViewGroup, Microsoft.Maui, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]].SetVirtualView(IElement view) in D:\a\_work\1\s\src\Core\src\Handlers\View\ViewHandlerOfT.cs:line 56
   at Microsoft.Maui.Controls.Element.SetHandler(IElementHandler newHandler) in D:\a\_work\1\s\src\Controls\src\Core\HandlerImpl\Element\Element.Impl.cs:line 63
   at Microsoft.Maui.Controls.Element.set_Handler(IElementHandler value) in D:\a\_work\1\s\src\Controls\src\Core\HandlerImpl\Element\Element.Impl.cs:line 19
   at Microsoft.Maui.Controls.VisualElement.Microsoft.Maui.IElement.set_Handler(IElementHandler value) in D:\a\_work\1\s\src\Controls\src\Core\HandlerImpl\VisualElement\VisualElement.Impl.cs:line 294
   at Microsoft.Maui.Platform.ElementExtensions.ToHandler(IElement view, IMauiContext context) in D:\a\_work\1\s\src\Core\src\Platform\ElementExtensions.cs:line 96
   at Microsoft.Maui.Platform.ViewExtensions.ToHandler(IView view, IMauiContext context) in D:\a\_work\1\s\src\Core\src\Platform\ViewExtensions.cs:line 43
   at Microsoft.Maui.Controls.Platform.Compatibility.ShellContentFragment.OnCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) in D:\a\_work\1\s\src\Controls\src\Core\Compatibility\Handlers\Shell\Android\ShellContentFragment.cs:line 145
   at AndroidX.Fragment.App.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) in C:\a\_work\1\s\generated\androidx.fragment.fragment\obj\Release\net6.0-android\generated\src\AndroidX.Fragment.App.Fragment.cs:line 1999
   at Android.Runtime.JNINativeWrapper.Wrap_JniMarshal_PPLLL_L(_JniMarshal_PPLLL_L callback, IntPtr jnienv, IntPtr klazz, IntPtr p0, IntPtr p1, IntPtr p2) in /Users/runner/work/1/s/xamarin-android/src/Mono.Android/Android.Runtime/JNINativeWrapper.g.cs:line 352

About this issue

  • Original URL
  • State: closed
  • Created 2 years ago
  • Reactions: 1
  • Comments: 27 (8 by maintainers)

Most upvoted comments

In my case the issue was because i was using a prerelease version (8.0.0-preview.1.7762) when I replaced it for the Microsoft.Maui.Controls.Maps.7.0.59 everything start working as expected.

For anyone running into issues like this, please read my comment here: https://github.com/dotnet/maui/issues/12320#issuecomment-1466450487

If you are still experiencing this problem, please post the contents of your CSPROJ file (so we can check the versions of everything), and your MauiProgram.cs file (so we can check the relevant startup code). You can omit any private or sensitive data.

Just a guess, but one of the repro apps seems to be mixing .NET 6 and .NET 7 in the same app.

For example, in https://github.com/nmdaraniya/Map_Demo_MAUI it’s using .NET 6 as the target framework: https://github.com/nmdaraniya/Map_Demo_MAUI/blob/master/Map_Demo_MAUI/Map_Demo_MAUI.csproj#L4

But it’s using the .NET 7 version of the Maps control: https://github.com/nmdaraniya/Map_Demo_MAUI/blob/master/Map_Demo_MAUI/Map_Demo_MAUI.csproj#L52

Mixing versions like that is not recommended. There was no .NET 6 version of the Maps control, so I suggest trying to update the whole app to .NET 7 and then trying again.