topic Re: Legend of maps in ArcGIS API for Silverlight Questions

Legend of maps

YassineEL_JADIDI — Tue, 15 May 2012 19:29:45 GMT

Hello,
i want to have a legend of two maps with radiobutton.
explaining : i want to have a legend with RadioButtons..when i click on first radiobutton, i should have a map(map1), and when i clicked in the another radiobutton, i should have another map (map2).
any help about this please !

Re: Legend of maps

JenniferNery — Sat, 11 Dec 2021 12:58:17 GMT

If you want Legend control to switch Map through RadioButton.Click, you can use RadioButton.Tag to store the element and implement its Click event.

You can do something like this:
XAML

  <StackPanel VerticalAlignment="Top" HorizontalAlignment="Center">
   <RadioButton x:Name="Rb" Content="Test" Tag="{Binding ElementName=MyMap}" Click="RadioButton_Click"/>
   <RadioButton x:Name="Rb2" Content="Test" Tag="{Binding ElementName=MyMap2}" Click="RadioButton_Click"/>
  </StackPanel>

Assuming you've given your Legend control a name (i.e. x:Name="MyLegend")
Code-behind

  private void RadioButton_Click(object sender, RoutedEventArgs e)
  {
   var rb = sender as RadioButton;
   if (rb.IsChecked.HasValue && rb.IsChecked.Value)
    MyLegend.Map = rb.Tag as Map;
  }

Re: Legend of maps

YassineEL_JADIDI — Fri, 18 May 2012 08:03:31 GMT

thank you jennifer for your replies.
i tried your solution but it didnt work.i want when i click in the radiobutton of map1....the map1 appear..and if i want the map2..i click in the other radiobutton.

Re: Legend of maps

DominiqueBroux — Fri, 18 May 2012 08:44:44 GMT

i tried your solution but it didnt work.i want when i click in the radiobutton of map1....the map1 appear..and if i want the map2..i click in the other radiobutton.

Do do you mean by 'the map1 appears'? appears in the legend (with 2 maps on the screen) or just toggled on/off with only one map visible at a time?

In the second case, you have just to create 2 maps and toggle the visibilities on/off depending on the radio button.

Re: Legend of maps

YassineEL_JADIDI — Fri, 18 May 2012 08:50:35 GMT

i mean when i click on the radiobutton of "map1", the map1 appear ine the screen with his legend, and when i click on radiobutton of map2, the map2 appear with his legend.
i wish i explained well what i want !!

Re: Legend of maps

DominiqueBroux — Fri, 18 May 2012 08:57:24 GMT

i mean when i click on the radiobutton of "map1", the map1 appear ine the screen with his legend, and when i click on radiobutton of map2, the map2 appear with his legend.
i wish i explained well what i want !!

So why not just define 2 maps and 2 legends with only one map and one legend visible at a time (radio button toggling visibility of these elements) ?

Re: Legend of maps

YassineEL_JADIDI — Fri, 18 May 2012 11:04:11 GMT

how can i do that ??
how can the radiobutton click toggle the visibility of a map ?? can you help me with the code please ?

Re: Legend of maps

ChristopherHill — Sat, 11 Dec 2021 12:58:20 GMT

Here is a simple example of how to do what you are asking using 2 maps and 2 Legends.

<Grid x:Name="LayoutRoot" Background="White">
        <esri:Map x:Name="Map1" Extent="-20037507.0671618,-20037507.0671618,20037507.0671618,20037507.0671619">
            <esri:ArcGISTiledMapServiceLayer ID="basemap" DisplayName="Base Map 1" Url="http://services.arcgisonline.com/arcgis/rest/services/world_topo_map/MapServer" />
            <esri:FeatureLayer ID="points" DisplayName="Incident Points" Url="http://sampleserver3.arcgisonline.com/ArcGIS/rest/services/HomelandSecurity/operations/FeatureServer/0" DisableClientCaching="True"/>
        </esri:Map>

        <esri:Map x:Name="Map2" Extent="-20037507.0671618,-20037507.0671618,20037507.0671618,20037507.0671619" Visibility="Collapsed">
            <esri:ArcGISTiledMapServiceLayer ID="basemap" DisplayName="Base Map 2" Url="http://services.arcgisonline.com/arcgis/rest/services/world_topo_map/MapServer" />
            <esri:FeatureLayer ID="lines" DisplayName="Incident Lines" Url="http://sampleserver3.arcgisonline.com/ArcGIS/rest/services/HomelandSecurity/operations/FeatureServer/1" DisableClientCaching="True"/>
            <esri:FeatureLayer ID="polygons" DisplayName="Incident Polygons" Url="http://sampleserver3.arcgisonline.com/ArcGIS/rest/services/HomelandSecurity/operations/FeatureServer/2" DisableClientCaching="True"/>
        </esri:Map>
        
        <Grid VerticalAlignment="Bottom" HorizontalAlignment="Right">
            <esri:Legend x:Name="Legend1" Map="{Binding ElementName=Map1}" LayerIDs="points" />
            <esri:Legend x:Name="Legend2" Map="{Binding ElementName=Map2}" LayerIDs="lines,polygons" Visibility="Collapsed" />
        </Grid>
        
        <StackPanel VerticalAlignment="Top" HorizontalAlignment="Right" Margin="10">
            <RadioButton GroupName="MapSwitcher" Tag="1" Content="Display Map 1" IsChecked="True" Click="RadioButton_Click" />
            <RadioButton GroupName="MapSwitcher" Tag="2" Content="Display Map 2" IsChecked="False" Click="RadioButton_Click" />
        </StackPanel>
    </Grid>

private void RadioButton_Click(object sender, RoutedEventArgs e)
{
 string tag = (sender as RadioButton).Tag as string;
 switch (tag)
 {
  case "1":
   Map1.Visibility = Visibility.Visible;
   Legend1.Visibility = Visibility.Visible;   
                                          Map2.Visibility = Visibility.Collapsed;
   Legend2.Visibility = Visibility.Collapsed;
   break;
  case "2":
   Map2.Visibility = Visibility.Visible;
   Legend2.Visibility = Visibility.Visible;
   Map1.Visibility = Visibility.Collapsed;
   Legend1.Visibility = Visibility.Collapsed;
                break;
  }   
 }
}

This should give you the functionality you are looking for and you can then change it to meet your needs.