Gerneral Transform InvalidOperation Exception was unhandled by user code

Question

I have ran into a problem that I am completely clueless about. I am receiving the following error message:

The specified Visual and the Visual do not share a common ancestor, so there is no valid transformation between the two visuals.

This is being called when the user clicks on a point on the map. Any help would be appreciated. I have attached snippets of the error. If you need anymore code samples, just let me know.

Here is my relevant XAML:

(<)inf:DialogWindowBase x:Class="Alliance.CommonUI.Views.Maps.EsriMapView"

<Grid>

<Grid>
 <DataTemplate x:Key="MyFeatureLayerInfoWindowTemplate">
                    <TextBlock Text="Content" Foreground="White" FontSize="12" />
                </DataTemplate>
                <esri:SimpleRenderer x:Key="MySimpleRenderer">
                    <esri:SimpleRenderer.Symbol>
                        <esri:SimpleFillSymbol Fill="#01FFFFFF" BorderBrush="#88000000" BorderThickness="2" />
                    </esri:SimpleRenderer.Symbol>
                </esri:SimpleRenderer>
 </Grid.Resources>

            <esri:Map x:Name="MyMap" Background="#FFE3E3E3" WrapAround="True" MouseClick="MyMap_MouseClick" MouseRightButtonDown="MyMap_MouseRightButtonDown" Extent="-9834972.92753924,4441899.425293319,-9833977.88119163, 4442762.485358352">
                <esri:ArcGISTiledMapServiceLayer ID="MyLayer" Url="http://services.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer" />
                <!--<esri:ArcGISLocalDynamicMapServiceLayer ID="Calvert_City" Path="C:\Users\jessical\Documents\ArcGIS\CalvertCity_Test.mpk"/>-->
                <esri:ArcGISDynamicMapServiceLayer  ID="Calvert_City" Url="http://localhost:6080/arcgis/rest/services/CalvertCity_Test_2/MapServer"/>
                <esri:FeatureLayer ID="MyFeatureLayer"  Url="http://localhost:6080/arcgis/rest/services/CalvertCity_Test_2/MapServer/0"
                            Renderer="{StaticResource MySimpleRenderer}" />
</esri:Map>

            <Border Background="{StaticResource PanelGradient}" BorderThickness="1" CornerRadius="5"
            HorizontalAlignment="Left"  VerticalAlignment="Top"
            Margin="20" Padding="5" BorderBrush="Black" >
                <esri:Legend Map="{Binding ElementName=MyMap}"
                         LayerIDs="Calvert_City"
                         LayerItemsMode="Tree"
                         ShowOnlyVisibleLayers="False"
                         Refreshed="Legend_Refreshed">
                    <esri:Legend.MapLayerTemplate>
                        <DataTemplate>
                            <StackPanel Orientation="Horizontal">
                                <CheckBox Content="{Binding Label}"
                                    IsChecked="{Binding IsEnabled, Mode=TwoWay}"
                                    IsEnabled="{Binding IsInScaleRange}" >
                                </CheckBox>
                                <Slider Maximum="1" Value="{Binding Layer.Opacity, Mode=TwoWay}" Width="50" />
                            </StackPanel>
                        </DataTemplate>
                    </esri:Legend.MapLayerTemplate>
                    <esri:Legend.LayerTemplate>
                        <DataTemplate>
                            <CheckBox Content="{Binding Label}"
                            IsChecked="{Binding IsEnabled, Mode=TwoWay}"
                            IsEnabled="{Binding IsInScaleRange}" >
                            </CheckBox>
                        </DataTemplate>
                    </esri:Legend.LayerTemplate>
                </esri:Legend>
            </Border>
            <esri:InfoWindow x:Name="MyInfoWindow"
                         Padding="2"
                         CornerRadius="20"
                         Background="{StaticResource PanelGradient}"
                         Map="{Binding ElementName=MyMap}"
                         ContentTemplate="{StaticResource MyFeatureLayerInfoWindowTemplate}"
                         MouseLeftButtonUp="MyInfoWindow_MouseLeftButtonUp" />

Answer 1

I was getting this error using a third party control from SciChart. I found that the error was being thrown under the covers and the debugger would make it look like the error was not being handled. However, when I just turned off break on this type of exception and put a break point in my catch statement, the exception did not fall into my catch block. I'm somewhat confused by all of this, but it seems to be working.

So my suggestion is to have the debugger not break on this type of exception and see how that works.

Answer 2

You're using TransformToVisual. It should be TransformToAncestor.