topic Re: Attribute Editing for multiple layers in ArcGIS API for Silverlight Questions

Attribute Editing for multiple layers

WilliamDonahue — Fri, 29 Oct 2010 13:23:28 GMT

I was wondering if it was possible to use one attribute editor for multuiple layers. It would streamline my application stream and reduce the file size.

Re: Attribute Editing for multiple layers

AliMirzabeigi — Fri, 29 Oct 2010 15:53:02 GMT

An alternative would be to use a ComboBox bound to the layers collection in your map and binding the FeatureLayer property of the FeatureDataForm to the selected layer (SelectedItem) in your ComboBox. Depending on your application logic you would then need to set the GraphicSource property of the FeatureDataForm accordingly.

Re: Attribute Editing for multiple layers

WilliamDonahue — Mon, 01 Nov 2010 12:54:00 GMT

I have minimal programing experience with the online APIs. I just started 2 weeks ago. I have been following the online samples. Would it be possible for you to clarify how to use the combo box to make the Graphics changes?

Re: Attribute Editing for multiple layers

AliMirzabeigi — Sun, 12 Dec 2021 04:31:05 GMT

Here is a simple example...
Assume you have the following layers in your UserControl:

<esri:Map x:Name="MyMap">
<esri:ArcGISTiledMapServiceLayer ID="BaseLayer" 
                Url="http://services.arcgisonline.com/ArcGIS/rest/services/ESRI_StreetMap_World_2D/MapServer" />
<esri:FeatureLayer ID="Fire" OutFields="*" DisableClientCaching="True" AutoSave="False" MouseLeftButtonUp="FeatureLayer_MouseLeftButtonUp"
                Url="http://sampleserver3.arcgisonline.com/ArcGIS/rest/services/Fire/Sheep/FeatureServer/0" />
<esri:FeatureLayer ID="HomelandSecurity" OutFields="*" DisableClientCaching="True" AutoSave="False" MouseLeftButtonUp="FeatureLayer_MouseLeftButtonUp"
                Url="http://sampleserver3.arcgisonline.com/ArcGIS/rest/services/HomelandSecurity/operations/FeatureServer/0" />
</esri:Map>

I added a StackPanel containing my ComboBox and a FeatureDataForm for attribute editing. The GraphicSource property of the FeatureDataForm has set to the selected graphic of the feature layers:

<StackPanel HorizontalAlignment="Right" VerticalAlignment="Top" Margin="10">
<StackPanel Orientation="Horizontal">
<TextBlock Text="Select Layer" />
<ComboBox x:Name="cboLayers" Margin="3,0,0,0">
<ComboBoxItem Content="Fire" DataContext="{Binding Path=Layers[1], ElementName=MyMap}" />
<ComboBoxItem Content="HomelandSecurity" DataContext="{Binding Path=Layers[2], ElementName=MyMap}" />
</ComboBox>
</StackPanel>
<esri:FeatureDataForm x:Name="MyFeatureDataForm" Width="400" Height="400" 
                                  FeatureLayer="{Binding Path=SelectedItem.DataContext, ElementName=cboLayers}" 
                                  GraphicSource="{Binding Path=SelectedItem.DataContext.SelectedGraphics[0], ElementName=cboLayers}" />
</StackPanel>

And here is the MouseLeftButtonUp event handler of both FeatureLayers:

private void FeatureLayer_MouseLeftButtonUp(object sender, ESRI.ArcGIS.Client.GraphicMouseButtonEventArgs e)
        {
            FeatureLayer featureLayer = sender as FeatureLayer;
            for (int i = 0; i < featureLayer.SelectionCount; i++)
                featureLayer.SelectedGraphics.ToList().UnSelect();
            e.Graphic.Select();
        }

Hope this helps.

Re: Attribute Editing for multiple layers

JenniferNery — Sun, 12 Dec 2021 04:31:08 GMT

Another way is to have all the FeatureLayer subscribe to MouseLeftButtonDown event and update your FeatureDataForm's FeatureLayer and GraphicSource in the eventhandler:

 private void FeatureLayer_MouseLeftButtonDown(object sender, ESRI.ArcGIS.Client.GraphicMouseButtonEventArgs e)
 {
  this.MyFeatureDataForm.FeatureLayer = sender as FeatureLayer;
  this.MyFeatureDataForm.GraphicSource = e.Graphic;
 }

If you are going to use Ali's suggestion, your ComboBox ItemSource need to bind to a list of FeatureLayer and your FeatureDataForm's FeatureLayer need to bind to the SelectedItem of your ComboBox. How you choose the Graphic, is up to your application's logic.

Re: Attribute Editing for multiple layers

WilliamDonahue — Mon, 01 Nov 2010 17:44:26 GMT

Jen,

If i wanted to have it show a selection color for only the selected item how would i do that.

I when i change feature layers say from points to lines there are both a line and a point highlighted.

Thanks for the help so far.

Re: Attribute Editing for multiple layers

JenniferNery — Mon, 01 Nov 2010 17:58:57 GMT

You can iterate through the layers' Graphics and mark every selected graphic (Selected = false). You can subscribe to PropertyChanged event on all FeatureLayers. The property you need to check for is either "SelectedGraphics" or "SelectionCount". When either of these two property changes, you can check whether this is the layer you want the graphic to be selected, if not then be sure to unselect the graphic.

Re: Attribute Editing for multiple layers

WilliamDonahue — Mon, 01 Nov 2010 18:13:49 GMT

Is that a for loop that seaches through the entire Feature layer or is it more like a clear selection command?

Re: Attribute Editing for multiple layers

JenniferNery — Sun, 12 Dec 2021 04:31:10 GMT

It is a foreach loop.

foreach (Graphic item in layer.Graphics)
   item.Selected = false;

You can also use the Editor's ClearSelection command as in this sample: http://help.arcgis.com/en/webapi/silverlight/samples/start.htm#FeatureLayerSelection

Re: Attribute Editing for multiple layers

WilliamDonahue — Sun, 12 Dec 2021 04:31:13 GMT

I would perfer not to have my users need to click clear selection before each selection. I tried working with the code you provided and realized i am missing something. Below is my attached code

   private void FeatureLayer_MouseLeftButtonUp(object sender, GraphicMouseButtonEventArgs e)
        {   
   foreach (Graphic item in Map.Graphics)
      item.Selected = false;
   
   
            this.Attributes.FeatureLayer = sender as FeatureLayer;
   this.Attributes.GraphicSource = e.Graphic;
   this.Attachments.GraphicSource = e.Graphic;
   this.Attachments.FeatureLayer = sender as FeatureLayer;
   
   FeatureLayer featureLayer = sender as FeatureLayer;

What i don't really understand is what to put in the position before the .graphics, I keep getting errors returned.

Re: Attribute Editing for multiple layers

AliMirzabeigi — Sun, 12 Dec 2021 04:31:16 GMT

Map doesn't have the Graphics attribute, and the following line fails in yourFeatureLayer_MouseLeftButtonUp event handler:

foreach (Graphic item in Map.Graphics)
     item.Selected = false;

Instead you should get the feature layer firing the event and loop through the collection of graphics in that layer, i.e.

FeatureLayer layer = sender as FeatureLayer;
foreach (Graphic item in layer.Graphics)
     item.Selected = false;
this.Attributes.FeatureLayer = layer;
// And the rest of your code
........

Re: Attribute Editing for multiple layers

WilliamDonahue — Wed, 03 Nov 2010 15:50:23 GMT

Ali

The code you provided appears clear the layer that was currently selected. My app has 3 total featrue layers and what i want to do is clear all the selections from all the layers before the new selection is made. the rest of my code should make the new selection.

Thanks,

Will

Re: Attribute Editing for multiple layers

AliMirzabeigi — Sun, 12 Dec 2021 04:31:18 GMT

In that case in you can do something similar to the following in the MouseLeftButtonUp event handler (before the line "FeatureLayer layer = sender as FeatureLayer;") to clear selection from all "FeatureLayer" layers of your map control:

foreach (Layer layer in MyMap.Layers)
            {
                if (layer is FeatureLayer)
                {
                    foreach (Graphic item in (layer as FeatureLayer).Graphics)
                        item.Selected = false;
                }
            }

Re: Attribute Editing for multiple layers

WilliamDonahue — Fri, 05 Nov 2010 11:52:02 GMT

Thanks Guys for all the help. That worked.