Interactive data table for GraphicsLayers

[JianChen]

The ESRI sample (http://help.arcgis.com/en/webapi/silverlight/samples/start.htm#FeatureDataGrid) shows a way to create an interactive data table for GraphicLayer (click the map, associated feature will highlight in the FeatureDataGrid, Vice versa). The core part is the FeatureLayer_MouseLeftDown function as below:

private void FeatureLayer_MouseLeftButtonDown(object sender, GraphicMouseButtonEventArgs args)         {             args.Graphic.Selected = !args.Graphic.Selected;             if (args.Graphic.Selected)                 MyDataGrid.ScrollIntoView(args.Graphic, null);         }

XAML code from Sample:

<esri:FeatureLayer ID="California" Renderer="{StaticResource SelectRenderer}"      Url="http://serverapps.esri.com/ArcGIS/rest/services/California/MapServer/8"      OutFields="*" MouseLeftButtonDown="FeatureLayer_MouseLeftButtonDown" /> ... <esri:FeatureDataGrid Grid.Row="2" x:Name="MyDataGrid"     Map="{Binding ElementName=MyMap}"     GraphicsLayer="{Binding ElementName=MyMap, Path=Layers.[California]}" />
  The map user click actually is a feature layer and the featureDataGrid is binding to a GraphicsLayer (the same feature layer anyway). I make some changes from the sample for my application. If I get rid of the feature layer and the GraphicsLayer is returned from a query and I worte a similar GraphicsLayer_MouseLeftButton Down function, if you click the map, the entry in the FeatureDataGrid can be highlighted, but when I click a row in the FeatureDataGrid, the feature on the map doesn't highlight. What do I miss here?  
 private void GraphicsLayer_MouseLeftButtonDown(object sender, GraphicMouseButtonEventArgs e)         {             e.Graphic.Selected = !e.Graphic.Selected;             if (e.Graphic.Selected)                 MyDataGrid.ScrollIntoView(e.Graphic, null);         }

The XAML from my code:

<esri:GraphicsLayer ID="MyGraphicsLayer" MouseLeftButtonDown="GraphicsLayer_MouseLeftButtonDown" /> .... <esri:FeatureDataGrid x:Name="MyDataGrid" Background="White"     Map="{Binding ElementName=MyMap}"     GraphicsLayer="{Binding ElementName=MyMap, Path=Layers.[MyGraphicsLayer]}" >                           </esri:FeatureDataGrid>

[DominiqueBroux]

if you click the map, the entry in the FeatureDataGrid can be highlighted, but when I click a row in the FeatureDataGrid, the feature on the map doesn't highlight. What do I miss here?

Most generally this means that the Map of the FeatureDataGrid is not or badly initialized.

If this is the only location you initialize the Map

Map="{Binding ElementName=MyMap}"

my best bet would be that the Map is not called 'MyMap'.
Check that point. I have no others ideas anyway.

[JianChen]

Most generally this means that the Map of the FeatureDataGrid is not or badly initialized.

If this is the only location you initialize the Map

Map="{Binding ElementName=MyMap}"

my best bet would be that the Map is not called 'MyMap'.
Check that point. I have no others ideas anyway.

Thanks Dominique! I double checked and that is the only place I initialize the map and there's no other Map object in this project. So I don't have any idea but I'll keep digging it.

[DominiqueBroux]

Did you check taht your map is called 'MyMap' ?

[KenCarrier]

Did you check taht your map is called 'MyMap' ?

Is there any way to use a FeatureDataGrid without a map.

If I just wanting to edit a standalone table published as a FeatureServer service could I read the rows directly into the FeatureDataGrid?

[JianChen]

Did you check taht your map is called 'MyMap' ?

Positive! My map is called "MyMap" and I only initialize the FeatureDataGrid once in the XAML. I don't have any clue about what's wrong.

[JianChen]

I'm also thinking about write a function to response the LeftMouseDown event on FeatureDataGrid. But I don't know how to connect FeatureDataGrid back to GraphicsLayer. As we understand, a MouseLeftButtonDown function can use a selected graphic as an input of datagrid's ScrollIntoView function to find associated record. In a similar function on FeatureDataGrid, I can think about using selectedItem as a bridge to get the associated graphic in the GraphicsLayer. But how to do that? The next question is how to highlight the target feature in GraphicsLayer�? I couldn't find a method of GraphicsLayer can allow me to do this. Any idea? Thanks!

[JenniferNery]

You can look at this SDK sample: http://help.arcgis.com/en/webapi/silverlight/samples/start.htm#FeatureDataGrid
Code-behind (this can also be on GraphicsLayer_MouseLeftButtonDown):

        private void FeatureLayer_MouseLeftButtonDown(object sender, GraphicMouseButtonEventArgs args)
        {
            args.Graphic.Selected = !args.Graphic.Selected;
            if (args.Graphic.Selected)
                MyDataGrid.ScrollIntoView(args.Graphic, null);
        }

FeatureDataGrid.GraphicsLayer can be bound to a GraphicsLayer. It's fields will come from GraphicsLayer.Graphics.Attributes.

[JianChen]

You can look at this SDK sample: http://help.arcgis.com/en/webapi/silverlight/samples/start.htm#FeatureDataGrid
Code-behind (this can also be on GraphicsLayer_MouseLeftButtonDown):

        private void FeatureLayer_MouseLeftButtonDown(object sender, GraphicMouseButtonEventArgs args)
        {
            args.Graphic.Selected = !args.Graphic.Selected;
            if (args.Graphic.Selected)
                MyDataGrid.ScrollIntoView(args.Graphic, null);
        }

FeatureDataGrid.GraphicsLayer can be bound to a GraphicsLayer. It's fields will come from GraphicsLayer.Graphics.Attributes.

I already did what you suggested (as code included in the initial post). But somehow it doesn't work. I'm struggling in troubleshooting these days.

[DominiqueBroux]

No idea.
Can you share a piece of code allowing to reproduce the issue?