Raster Function Image Service Online

This sample demonstrates the use of the raster function templates available for an ArcGIS image service. An image service can provide an array of raster function infos. This sample service includes a list of raster function templates, custom rendering rules defined on the server and applied by a client. These raster functions can be discovered, displayed, and applied using the drop down list.

XAML

<UserControl x:Class="ArcGISWPFSDK.RasterFunctionImageService"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:esri="http://schemas.esri.com/arcgis/client/2009">
    <Grid x:Name="LayoutRoot">
        <esri:Map x:Name="MyMap" UseAcceleratedDisplay="True" Extent="1445440.75144509,540657.514450867,1452348.26589595,544407.514450867">
            <esri:ArcGISImageServiceLayer ID="MyImageLayer" 
                Url="http://sampleserver6.arcgisonline.com/arcgis/rest/services/CharlotteLAS/ImageServer" 
                Initialized="ArcGISImageServiceLayer_Initialized" />
        </esri:Map>
        <Border BorderBrush="Black" VerticalAlignment="Top" BorderThickness="1" Margin="15" 
                Background="White" HorizontalAlignment="Right" MinWidth="300">
            <Border.Effect>
                <DropShadowEffect />
            </Border.Effect>
            <StackPanel Margin="15">
                <TextBlock TextAlignment="Center" Text="Choose a raster function template" 
                      FontWeight="Bold" Height="16" />
                <ComboBox x:Name="RasterFunctionsComboBox" Margin="5" 
                          SelectionChanged="RasterFunctionsComboBox_SelectionChanged">
                    <ComboBox.ItemTemplate>
                        <DataTemplate>
                            <TextBlock Text="{Binding Name}"/>
                        </DataTemplate>
                    </ComboBox.ItemTemplate>
                </ComboBox>
            </StackPanel>
        </Border>
    </Grid>
</UserControl>

C#

using System.Windows;
using ESRI.ArcGIS.Client;
using System;
using System.Windows.Controls;

namespace ArcGISWPFSDK
{
  
    public partial class RasterFunctionImageService : UserControl
    {
        public RasterFunctionImageService()
        {
            InitializeComponent();
        }
        private void ArcGISImageServiceLayer_Initialized(object sender, EventArgs e)
        {
            RasterFunctionsComboBox.ItemsSource =
                (sender as ArcGISImageServiceLayer).RasterFunctionInfos;
            RasterFunctionsComboBox.SelectedIndex = 0;
        }

        private void RasterFunctionsComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            ArcGISImageServiceLayer imageLayer = MyMap.Layers["MyImageLayer"] as ArcGISImageServiceLayer;
            var rasterFunction = (sender as ComboBox).SelectedItem as RasterFunctionInfo;
            if (rasterFunction != null)
            {
                RenderingRule renderingRule = new RenderingRule() { RasterFunctionName = rasterFunction.Name };
                imageLayer.RenderingRule = renderingRule;
                imageLayer.Refresh();
            }
        }
    }
}

VB.NET

Imports System.Windows
Imports System.Windows.Controls
Imports ESRI.ArcGIS.Client

Namespace ArcGISWPFSDK
    Partial Public Class RasterFunctionImageService
        Inherits UserControl
        Public Sub New()
            InitializeComponent()
        End Sub
        Private Sub ArcGISImageServiceLayer_Initialized(ByVal sender As Object, ByVal e As EventArgs)
            RasterFunctionsComboBox.ItemsSource = (TryCast(sender, ArcGISImageServiceLayer)).RasterFunctionInfos
            RasterFunctionsComboBox.SelectedIndex = 0
        End Sub

        Private Sub RasterFunctionsComboBox_SelectionChanged(ByVal sender As Object, ByVal e As SelectionChangedEventArgs)
            Dim imageLayer As ArcGISImageServiceLayer = TryCast(MyMap.Layers("MyImageLayer"), ArcGISImageServiceLayer)
            Dim rasterFunction = TryCast((TryCast(sender, ComboBox)).SelectedItem, RasterFunctionInfo)
            If rasterFunction IsNot Nothing Then
                Dim renderingRule As New RenderingRule() With {.RasterFunctionName = rasterFunction.Name}
                imageLayer.RenderingRule = renderingRule
                imageLayer.Refresh()
            End If
        End Sub
    End Class
End Namespace