topic Re: arcGis silverlight api 2.1 Legend Control in ArcGIS API for Silverlight Questions

arcGis silverlight api 2.1 Legend Control

rohandontireddy — Mon, 03 Jan 2011 06:08:51 GMT

Hi iam using 2.1 Legend control fopr displaying legends if i use the map service http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Specialty/ESRI_StateCityHighway_USA/MapServer then im getting the legends properly
but if i use my mapservice http://192.168.16.17/ArcGIS/rest/services/DelhiMain10/MapServer im only getting the layers list legends are not getting displayed.
an i missing something in mapservice ?

Re: arcGis silverlight api 2.1 Legend Control

DominiqueBroux — Mon, 03 Jan 2011 07:01:35 GMT

As your service is not public, the legend control can't use the legend service on ArcGIS.com to generate swatches.
So, the legend details have to come from your map service but this is only working from ArcGIS server 10 SP1.

You can test your legend rest end point with a request like : http://services.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_MedianIncome_US_2D/MapServer/legend

Re: arcGis silverlight api 2.1 Legend Control

GregoryDillon — Mon, 03 Jan 2011 16:48:17 GMT

We are having the same problem.   Our Dynamic layer is not public, but ArcGIS 10 SP 1 is installed.   We are still not seeing any symbology.   Does the layer have to be public if you have 10 sp 1?

In addition, we have learned the following:

1) Our layer are consists of 1 parent and multiple child nodes in the Legend TOC.   The TOC part of the legend allow us to expand the parent layer (that is the group layer), but we cannot expand the child node (layers underneath parent group layer) to see the symbology

2) When we created a test FeatureLayer pointing directly to one of the child layers and all the symbology displays for that feature.   Its like the legend won't work for dynamic layers when they are not public???

Re: arcGis silverlight api 2.1 Legend Control

DominiqueBroux — Mon, 03 Jan 2011 17:02:01 GMT

Does the layer have to be public if you have 10 sp 1?

No, it should work with private service.

If you request your map service, you should see a Legend hyperlink (e.g. http://services.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_MedianIncome_US_2D/MapServer).

By clicking this Legend Hyperlink, you should see the legend defined by your service (e.g http://services.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_MedianIncome_US_2D/MapServer/legend).

Is this working with your service?

Re: arcGis silverlight api 2.1 Legend Control

GregoryDillon — Mon, 03 Jan 2011 18:39:23 GMT

No, it should work with private service.

If you request your map service, you should see a Legend hyperlink (e.g. http://services.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_MedianIncome_US_2D/MapServer).

By clicking this Legend Hyperlink, you should see the legend defined by your service (e.g http://services.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_MedianIncome_US_2D/MapServer/legend).

Is this working with your service?

No the service does not have a legend hyperlink, but I believe we just discovered the ArcGIS Service did not have SP1 (only the desktop is SP1). I'll let you know when we patch that.

Re: arcGis silverlight api 2.1 Legend Control

GregoryDillon — Mon, 03 Jan 2011 19:46:37 GMT

Okay its working now! Thanks for the info, you pointed us in the right direction

Re: arcGis silverlight api 2.1 Legend Control

JollyJacob — Tue, 04 Jan 2011 03:21:47 GMT

We have the same problem. We haven't installed SP1 yet but the legend control works with services created on 9.3.1 but does not work with services created on 10. Any idea why this is so? But we do plan to install SP1 later today and check it out.

Re: arcGis silverlight api 2.1 Legend Control

DominiqueBroux — Tue, 04 Jan 2011 10:37:13 GMT

Okay its working now! Thanks for the info, you pointed us in the right direction

You are welcome:).

We have the same problem. We haven't installed SP1 yet but the legend control works with services created on 9.3.1 but does not work with services created on 10. Any idea why this is so? But we do plan to install SP1 later today and check it out.

There should not be any difference between 9.3.1 and 10 services. Both are using the arcgis.com legend service but this can work with public services only.
From 10SP1, the map service includes its own legend service.

Re: arcGis silverlight api 2.1 Legend Control

JollyJacob — Tue, 04 Jan 2011 11:32:39 GMT

Thanks Dominique, it's working now with SP1 🙂

But we have another problem now, we are wanting to print legends while printing the map and don't want the tree view that comes with the Legend control. What other possible ways could we use to print legends on printouts of maps?

Re: arcGis silverlight api 2.1 Legend Control

DominiqueBroux — Tue, 04 Jan 2011 13:29:39 GMT

I..don't want the tree view that comes with the Legend control.

If you set to 'Flat' the LayerItemsMode of the legend control, you won't see any group layers or map services item in the legend.

But even in Flat mode the default legend template is using a tree view (with only 2 levels one for the layer items, one for the swatches).

Then if you need advanced customization, you can retemplate the legend control with any items control you want.

Re: arcGis silverlight api 2.1 Legend Control

JollyJacob — Wed, 05 Jan 2011 03:49:33 GMT

Thanks Dominique. We'll try the Flat mode and if time permits redesign the legend control.

Re: arcGis silverlight api 2.1 Legend Control

DominiqueBroux — Sun, 12 Dec 2021 01:31:44 GMT

In case this could help, here is a legend style using only itemscontrols (2 imbricated itemscontrols, one for layer items, one for legend items)

<Style x:Key="ItemsControl" TargetType="esriToolkit:Legend">
    <Setter Property="LayerItemsMode" Value="Flat" />
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="esriToolkit:Legend">
                <ScrollViewer    Background="{TemplateBinding Background}"
                        BorderBrush="{TemplateBinding BorderBrush}"
                        BorderThickness="{TemplateBinding BorderThickness}"   
                        Padding="{TemplateBinding Padding}"
                        >
                    <ItemsControl ItemsSource="{TemplateBinding LayerItemsSource}" 
                                    HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}">
                        <ItemsControl.ItemTemplate>
                            <DataTemplate>
                                <StackPanel Orientation="Vertical">
 
                                    <!--Layer Item-->
                                    <ContentPresenter Content="{Binding}" ContentTemplate="{Binding Template}" />
 
                                    <!--Legend Items-->
                                    <ItemsControl ItemsSource="{Binding LegendItems}" >
                                        <ItemsControl.ItemTemplate>
                                            <DataTemplate >
                                                <ContentPresenter Content="{Binding}" ContentTemplate="{Binding Template}" />
                                            </DataTemplate>
 
                                        </ItemsControl.ItemTemplate>
                                    </ItemsControl>
                                </StackPanel>
                            </DataTemplate>
                        </ItemsControl.ItemTemplate>
                        <ItemsPresenter/>
                    </ItemsControl>
                </ScrollViewer>
 
            </ControlTemplate>
 
        </Setter.Value>
    </Setter>
</Style>

Re: arcGis silverlight api 2.1 Legend Control

SergioGalindo — Mon, 21 Feb 2011 19:44:27 GMT

Hi Dominique,

Is there any way of changing the legend symbol size?

Thanks,

Sergio

Re: arcGis silverlight api 2.1 Legend Control

DominiqueBroux — Sun, 12 Dec 2021 01:31:46 GMT

Hi Sergio,

To change the symbol size you have to change the LegendItemTemplate.

The easiest way is to give a fixed size to the symbol (15 in this sample) :

<esri:Legend.LegendItemTemplate>
<DataTemplate>
<StackPanel Orientation="Horizontal" Margin="0,-1">
<Image Source="{Binding ImageSource}" HorizontalAlignment="Center" VerticalAlignment="Center"
                   Stretch="Uniform" Height="15" Width="15" Margin="0,-1" />
<TextBlock Text="{Binding Label}" Margin="5,0,0,0" VerticalAlignment="Center" />
</StackPanel>
</DataTemplate>
</esri:Legend.LegendItemTemplate>

The side effect due to the uniform stretch is that all symbols will have the same size. This can be an issue if your feature layer rendering is playing with the size of the symbols.
In this case, I guess that one option is to set the image height and width to a ratio of the PixelHeight and PixelWidth of the image source. But this is a little bit complex, there is probably simpler solution, but which one:confused:.

Re: arcGis silverlight api 2.1 Legend Control

SergioGalindo — Mon, 21 Feb 2011 23:56:37 GMT

That's exactly what i was looking for.

1000 thanks!!!!!

Sergio

Re: arcGis silverlight api 2.1 Legend Control

JuanPoma — Wed, 30 Mar 2011 16:38:06 GMT

hi,

Is there legend link for MapServices in ArcGIS Server for Java Plataform?

I installed ArcGIS SP1 for ArcGIS Server for Java Plataform, and legend link is not shown.

Thanks for your help.

Re: arcGis silverlight api 2.1 Legend Control

RobertDolormente — Thu, 04 Aug 2011 20:55:58 GMT

So I've having same issue. Funny thing is it was working earlier. Currently, I have no legend link in services page and no symbology showing up in my app. What do I need to do to get the legend link? I'm running ArcGIS 10.

Re: arcGis silverlight api 2.1 Legend Control

DominiqueBroux — Fri, 05 Aug 2011 07:00:16 GMT

At first glance it looks like your server is now using ArcGIS 10 and no more ArcGIS server 10SP1.

You can check the version of your server with a request like this one : http://services.arcgisonline.com/ArcGIS/rest/services. The current version for 10SP1 should be 10.01.

Re: arcGis silverlight api 2.1 Legend Control

BabakSekandari1 — Mon, 08 Aug 2011 18:46:58 GMT

My Legend control is also not showing the symbology.
I'm using the following control:
http://help.arcgis.com/en/webapi/silverlight/samples/start.htm#LegendWithTemplates

I have ArcGIS 9.3.1 SP1.
What does it mean for a layer to be public or private? How can I check / alter that.

Also, when I first added the Legend control to my application, it should the map services and their layers. Now it just shows the map services. It is the same code. Any ideas what might have happened?

Re: arcGis silverlight api 2.1 Legend Control

DominiqueBroux — Tue, 30 Aug 2011 07:10:40 GMT

I have ArcGIS 9.3.1 SP1.
What does it mean for a layer to be public or private? How can I check / alter that.

'public' means that anybody from anywhere can access to the Url of your map service.
A typical non public url is : http://localhost/.....