topic Re: ClassBreaksRenderer using a date in ArcGIS API for Silverlight Questions

ClassBreaksRenderer using a date

LanceCrumbliss — Fri, 03 Feb 2012 10:13:46 GMT

Hello all,

Using XAML (and any required code behind or valueconverter) how can I utilize a date (datetime datatype) value for the max/min properties for the classes in a ClassBreaksRenderer? Using the values in the date field of a FeauterLayer, I'd like to be able to break the symbology down into the past day (a green MarkerSymbol), the past week (an orange MarkerSymbol), the past month (a yellow MarkerSymbol), and the past year (a white MarkerSymbol).

Lance

Re: ClassBreaksRenderer using a date

JenniferNery — Fri, 03 Feb 2012 15:55:43 GMT

For time-aware layers, you can use TimeClassBreaksAger, it is similar to ClassBreaksRenderer, except there is TimeUnits associated to MinimumAge and MaximumAge: http://help.arcgis.com/en/webapi/silverlight/apiref/ESRI.ArcGIS.Client~ESRI.ArcGIS.Client.TimeClassBreaksAger.html

Re: ClassBreaksRenderer using a date

LanceCrumbliss — Fri, 03 Feb 2012 17:53:43 GMT

[HTML]<esri:Map Grid.Column="0" Name="Map1" Loaded="Map1_Loaded" WrapAround="True" ExtentChanged="Map1_ExtentChanged" SnapToLevels="True">
            <bing:TileLayer x:Name="Base_Map" ID="Base_Map" Token="<token>" ServerType="Production" LayerStyle="AerialWithLabels"/>
            <esri:FeatureLayer ID="flJobs"    Url="http://<serveraddress>" Initialized="FeatureLayer_Initialized" InitializationFailed="FeatureLayer_InitializationFailed">
                <esri:FeatureLayer.MapTip>
                    <Border CornerRadius="0" BorderBrush="Black" BorderThickness="1" Margin="0,0,15,15" Background="White">
                        <Border.Effect>
                            <DropShadowEffect ShadowDepth="10" BlurRadius="14" Direction="300" />
                        </Border.Effect>
                        <StackPanel Orientation="Vertical">
                            <TextBlock Margin="3" Text="{Binding [JobNum]}" FontWeight="Bold" Foreground="Black" />
                            <TextBlock Margin="3" Text="{Binding [DateEntered]}" FontWeight="Bold" Foreground="Black" />
                        </StackPanel>

                    </Border>
                </esri:FeatureLayer.MapTip>

                <esri:FeatureLayer.Renderer>
                    <esri:TemporalRenderer TrackIdField="DateEntered" >
                        <esri:TemporalRenderer.ObservationRenderer>
                            <esri:SimpleRenderer>
                                <esri:SimpleMarkerSymbol Color="Black" Size="4" Style="Circle"/>
                            </esri:SimpleRenderer>
                        </esri:TemporalRenderer.ObservationRenderer>
                        <esri:TemporalRenderer.SymbolAger>
                            <esri:TimeClassBreaksAger Unit="Days">
                                <esri:TimeClassBreakInfo Color="Green" Size="10" MinimumAge="0.0" MaximumAge="1.0"/>
                                <esri:TimeClassBreakInfo Color="Orange" Size="10" MinimumAge="1.0" MaximumAge="7.0"/>
                                <esri:TimeClassBreakInfo Color="Yellow" Size="7" MinimumAge="7.0" MaximumAge="30.0"/>
                                <esri:TimeClassBreakInfo Color="Red" Size="5" MinimumAge="30.0" MaximumAge="90.0"/>
                            </esri:TimeClassBreaksAger>
                        </esri:TemporalRenderer.SymbolAger>
                    </esri:TemporalRenderer>
                </esri:FeatureLayer.Renderer>
            </esri:FeatureLayer>
        </esri:Map>
        [/HTML]

With the time extent set on map load:

Map1.TimeExtent = New TimeExtent(Date.Now.AddDays(-90), Date.Now)

Displays only the black symbols (the ObservationRender symbol) on the map. What am I missing?

Re: ClassBreaksRenderer using a date

JenniferNery — Sat, 11 Dec 2021 09:35:14 GMT

You can look at the time-aware layers sample in the SDK: http://help.arcgis.com/en/webapi/silverlight/samples/start.htm#TimeFeatureLayer. Notice that Map.TimeExtent is set using TimeSlider and TimeSlider Min/Max/Value are based on Layer's TimeExtent.

        <esri:Map x:Name="MyMap" WrapAround="True"
                  TimeExtent="{Binding ElementName=MyTimeSlider, Path=Value}">
<!-- more code goes here -->

        <esri:TimeSlider x:Name="MyTimeSlider" 
      Height="20" TimeMode="TimeExtent"
                        MinimumValue="{Binding ElementName=MyMap, Path=Layers[EarthquakesLayer].TimeExtent.Start, Mode=OneWay}" 
         MaximumValue="{Binding ElementName=MyMap, Path=Layers[EarthquakesLayer].TimeExtent.End, Mode=OneWay}"
                        Value="{Binding ElementName=MyMap, Path=Layers[EarthquakesLayer].TimeExtent, Mode=OneWay}" >
                    </esri:TimeSlider>

Re: ClassBreaksRenderer using a date

LanceCrumbliss — Mon, 06 Feb 2012 11:14:49 GMT

Upgrading to v2.4 from v2.2 solved it using the original code.