I'm trying to add graphics to my map in XAML using this syntax: [HTML] Graphic 0 .... [/HTML]I get a runtime exception (I assume because Attributes is read-only). Is there a way to add attributes with XAML?

nav[aria-label="Primary Navigation"] { padding: 0; & ul { list-style: none; width: 100%; display: flex; flex-direction: row; justify-content: start; align-items: start; gap: 30px; padding: 0; & li { margin: 0; } & ul li { list-style: none; } } }

Adding Graphic.Attributes in XAML

DanielWalton

I'm trying to add graphics to my map in XAML using this syntax:

[HTML]<esri:GraphicsLayer ID="Shapes">
       <esri:Graphic>
          <esri:Graphic.Attributes>
             <sys:String x:Key="Name">Graphic 0</sys:String>
          </esri:Graphic.Attributes>
          <esri:Graphic.Geometry>....</esri:Graphic.Geometry>
       </esri:Graphic>
</esri:GraphicsLayer>[/HTML]I get a runtime exception (I assume because Attributes is read-only). Is there a way to add attributes with XAML?

Finde mehr Beiträge mit dem Tag

Accepted answers

All comments

DanielWalton

Perfect. Thanks Dominique!

DominiqueBroux

One possible option is you to use an XML format to store graphics.
You will find sample code to serialize/deserialize graphics here: http://forums.arcgis.com/threads/8774-save-layer-to-xml-file

DanielWalton

I'm trying to get away from querying a service and load stuff fast.

JenniferNery

I dont know if this would solve your problem but what you can do is query the FeatureService and in the QueryTask_ExecuteCompleted update a GraphicsCollection (In the sample-code below, use the same instance as MyGraphicCollection).

 <Grid.Resources>
  <esri:GraphicCollection x:Key="MyGraphicCollection"/>
<!--more code goes here -->
 </Grid.Resources>
<!--more code goes here -->
 <esri:GraphicsLayer ID="MyGraphicsLayer" 
   Graphics="{Binding Source={StaticResource MyGraphicCollection}, Path=Graphics}" Renderer="{StaticResource MyRenderer}"/>

DanielWalton

No, this is just a one-off operation to capture the geometry and attributes of a certain set of features, then hard-code both into my app.

JenniferNery

You don't want to update the attributes in code-behind? (i.e. graphic.Attributes["STATE"] = "California")

DanielWalton

My goal is to 'hard-code' some features with attributes into my app. I am generating the XAML dynamically from a FeatureService dataset, then when (if) I can get it working, I will remove the FeatureService and just have the graphics. If I can't add the attributes with XAML, is there a way to store JSON messages and trick the FeatureService into reading them when it loads?

JenniferNery

If you are using SL4, the only way I could think of about doing this is as follows:

   <TextBox  Width="50"  Text="{Binding [STATE_NAME], Mode=TwoWay}" DataContext="{Binding ElementName=MyMap, Path=Layers[MyGraphics].Graphics[0].Attributes}"/>

Where MyMap is the name of my map, MyGraphics is the ID of my Layer, and Graphics[0] is expected to exist.

This is the sample, I placed breakpoint on MouseLeftButtonDown to inspect the Attributes. You can also do a MessageBox.Show() on e.Graphic.Attributes["STATE"] to see that it matches your TextBox. It's not a pretty solution because each TextBox would have to represent a field for one of the graphics.

 <Grid x:Name="LayoutRoot" Background="White">

  <Grid.Resources>
   <esri:SimpleMarkerSymbol x:Key="RedMarkerSymbol" Color="Red" Size="12" Style="Circle" />
  </Grid.Resources>

  <esri:Map x:Name="MyMap" Background="White">
   <esri:ArcGISTiledMapServiceLayer ID="PhysicalTiledLayer" Url="http://services.arcgisonline.com/ArcGIS/rest/services/NPS_Physical_World_2D/MapServer"/>

   <esri:GraphicsLayer ID="MyGraphics" MouseLeftButtonDown="GraphicsLayer_MouseLeftButtonDown">
    <esri:GraphicsLayer.Graphics >

     <esri:Graphic Symbol="{StaticResource RedMarkerSymbol}" >
      <esri:MapPoint X="-140.9" Y="63.391" />      
     </esri:Graphic>
    </esri:GraphicsLayer.Graphics>
   </esri:GraphicsLayer>
  </esri:Map>
  <StackPanel VerticalAlignment="Top" HorizontalAlignment="Center" >
   <TextBox  Width="50"  Text="{Binding [STATE_NAME], Mode=TwoWay}" DataContext="{Binding ElementName=MyMap, Path=Layers[MyGraphics].Graphics[0].Attributes}"/>
  </StackPanel>
 
 </Grid>

Nimm an der Unterhaltung teil

Angemeldete Mitglieder können Beiträge verfassen, Updates folgen und mehr. Neu hier? Registriere ein kostenloses Konto.

Schnellzugriffe

Community Help
Find useful guides, FAQs, and documents to help you navigate and make the most of Esri Community.