// Create a unique value renderer by state sub-region name
private async Task SetUniqueRenderer()
{
try
{
// Generate a unique value renderer on the server
GenerateRendererTask generateRendererTask = new GenerateRendererTask(new Uri(LAYER_URL));
UniqueValueDefinition uvDef = new UniqueValueDefinition()
{
Fields = new string[] { "sub_region" }
};
uvDef.ColorRamps.Add(new ColorRamp()
{
From = Colors.Purple, To = Colors.Yellow, Algorithm = Algorithm.LabLch
});
GenerateRendererParameter rendererParams = new GenerateRendererParameter()
{
ClassificationDefinition = uvDef
};
var rendererResult = await generateRendererTask.GenerateRendererAsync(rendererParams);
_graphicsLayer.Renderer = rendererResult.Renderer;
}
catch (Exception ex)
{
var _ = new MessageDialog(ex.Message, "Sample Error").ShowAsync();
}
}
// Create a unique value renderer by state sub-region name
private async Task SetupSymbology()
{
try
{
// Generate a unique value renderer on the server
GenerateRendererTask generateRendererTask = new GenerateRendererTask(new Uri(LAYER_URL));
UniqueValueDefinition uvDef = new UniqueValueDefinition()
{
Fields = new List <string> {
"sub_region"
}
};
uvDef.ColorRamps.Add(new ColorRamp()
{
From = Colors.Purple, To = Colors.Yellow, Algorithm = Algorithm.LabLch
});
GenerateRendererParameters rendererParams = new GenerateRendererParameters()
{
ClassificationDefinition = uvDef
};
var rendererResult = await generateRendererTask.GenerateRendererAsync(rendererParams);
_graphicsOverlay.Renderer = rendererResult.Renderer;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Statistics Sample");
}
}
private async Task GenerateRenderer(GenerateRendererParameters rendererParam)
{
GenerateRendererResult result = await generateRendererTask.GenerateRendererAsync(rendererParam);
LayerDrawingOptions layerDrawingOptions = null;
LayerDrawingOptionCollection options = null;
// If this is the first execution of this sample create a new LayerDrawingOptionsCollection
if (((ArcGISDynamicMapServiceLayer)map.Layers["USA"]).LayerDrawingOptions == null)
{
options = new LayerDrawingOptionCollection();
// Add a new LayerDrawingOptions for layer ID 2 using the generated renderer
options.Add(new LayerDrawingOptions()
{
LayerID = 2, Renderer = result.Renderer
});
}
else
{
// Otherwise the layer will have an existing LayerDrawingOptionsCollection from a previous button click
options = ((ArcGISDynamicMapServiceLayer)map.Layers["USA"]).LayerDrawingOptions;
// Iterate over the LayerDrawingOptionsCollection.
// For layer ID 2 get the existing LayerDrawingOptions object and apply the newly generated renderer
foreach (LayerDrawingOptions drawOption in options)
{
if (drawOption.LayerID == 2)
{
layerDrawingOptions = drawOption;
drawOption.Renderer = result.Renderer;
}
}
}
// Retrieve the GenerateRendererParameters Where clause and create a new LayerDefinition for layer ID 2
if (!string.IsNullOrEmpty(rendererParam.Where))
{
LayerDefinition layerDefinition = new LayerDefinition()
{
LayerID = 2,
Definition = rendererParam.Where
};
((ArcGISDynamicMapServiceLayer)map.Layers["USA"]).LayerDefinitions =
new ObservableCollection <LayerDefinition>()
{
layerDefinition
};
}
// Apply the updated LayerDrawingOptionsCollection to the LayerDrawingOptions property on the layer
((ArcGISDynamicMapServiceLayer)map.Layers["USA"]).LayerDrawingOptions = options;
}
// When field to summarize on changes, generate a new renderer from the map service
private async void comboField_SelectionChanged(object sender, Windows.UI.Xaml.Controls.SelectionChangedEventArgs e)
{
try
{
// Generate a new renderer
GenerateRendererTask generateRenderer = new GenerateRendererTask(
new Uri("http://sampleserver6.arcgisonline.com/arcgis/rest/services/Census/MapServer/2"));
var colorRamp = new ColorRamp()
{
Algorithm = Algorithm.Hsv,
From = Color.FromArgb(0xFF, 0x99, 0x8E, 0xC3),
To = Color.FromArgb(0xFF, 0xF1, 0xA3, 0x40)
};
var classBreaksDef = new ClassBreaksDefinition()
{
BreakCount = 5,
ClassificationField = ((Windows.UI.Xaml.Controls.ComboBoxItem)comboField.SelectedItem).Tag as string,
ClassificationMethod = ClassificationMethod.Quantile,
BaseSymbol = _baseSymbol,
ColorRamps = new ObservableCollection <ColorRamp>()
{
colorRamp
}
};
var param = new GenerateRendererParameters()
{
ClassificationDefinition = classBreaksDef,
Where = ((ServiceFeatureTable)_featureLayer.FeatureTable).Where
};
var result = await generateRenderer.GenerateRendererAsync(param);
_featureLayer.Renderer = result.Renderer;
// Reset the legend
txtLegendTitle.DataContext = comboField.SelectedValue.ToString();
await CreateLegend((ClassBreaksRenderer)result.Renderer);
}
catch (Exception ex)
{
var _x = new MessageDialog(ex.Message, "Sample Error").ShowAsync();
}
}
// Create a unique value renderer by state sub-region name
private async Task SetupSymbology()
{
try
{
// Generate a unique value renderer on the server
GenerateRendererTask generateRendererTask = new GenerateRendererTask(new Uri(LAYER_URL));
UniqueValueDefinition uvDef = new UniqueValueDefinition() { Fields = new List<string> { "sub_region" } };
uvDef.ColorRamps.Add(new ColorRamp() { From = Colors.Purple, To = Colors.Yellow, Algorithm = Algorithm.LabLch });
GenerateRendererParameters rendererParams = new GenerateRendererParameters() { ClassificationDefinition = uvDef };
var rendererResult = await generateRendererTask.GenerateRendererAsync(rendererParams);
_graphicsOverlay.Renderer = rendererResult.Renderer;
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Statistics Sample");
}
}
// When field to summarize on changes, generate a new renderer from the map service
private async void comboField_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
try
{
// Generate a new renderer
GenerateRendererTask generateRenderer = new GenerateRendererTask(
new Uri("http://sampleserver6.arcgisonline.com/arcgis/rest/services/Census/MapServer/2"));
var colorRamp = new ColorRamp()
{
Algorithm = Algorithm.Hsv,
From = Color.FromRgb(0x99, 0x8E, 0xC3),
To = Color.FromRgb(0xF1, 0xA3, 0x40)
};
var classBreaksDef = new ClassBreaksDefinition()
{
BreakCount = 5,
ClassificationField = ((ComboBoxItem)comboField.SelectedItem).Tag as string,
ClassificationMethod = ClassificationMethod.Quantile,
BaseSymbol = _baseSymbol,
ColorRamps = new ObservableCollection<ColorRamp>() { colorRamp }
};
var param = new GenerateRendererParameters()
{
ClassificationDefinition = classBreaksDef,
Where = ((ServiceFeatureTable)featureLayer.FeatureTable).Where
};
var result = await generateRenderer.GenerateRendererAsync(param);
featureLayer.Renderer = result.Renderer;
// Reset the legend
txtLegendTitle.DataContext = comboField.SelectedValue.ToString();
await CreateLegend((ClassBreaksRenderer)result.Renderer);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Generate Renderer Task Sample");
}
}
// Create a unique value renderer by state sub-region name
private async Task SetUniqueRenderer()
{
try
{
// Generate a unique value renderer on the server
GenerateRendererTask generateRendererTask = new GenerateRendererTask(new Uri(LAYER_URL));
UniqueValueDefinition uvDef = new UniqueValueDefinition() { Fields = new string[] { "sub_region" } };
uvDef.ColorRamps.Add(new ColorRamp() { From = Colors.Purple, To = Colors.Yellow, Algorithm = Algorithm.LabLch });
GenerateRendererParameter rendererParams = new GenerateRendererParameter() { ClassificationDefinition = uvDef };
var rendererResult = await generateRendererTask.GenerateRendererAsync(rendererParams);
_graphicsLayer.Renderer = rendererResult.Renderer;
}
catch (Exception ex)
{
var _ = new MessageDialog(ex.Message, "Sample Error").ShowAsync();
}
}