Load Dynamically

This sample demonstrates adding data in a WebMap document housed via ArcGIS Online (http://www.arcgis.com) in a WPF application. The WebMap.GetMapAsync Method call takes a Globally Unique Identifier (GUID) for the WebMap service provided by ArcGIS Online to obtain the geographic data layers. The WebMap’s GetMapCompletedEventArgs.Map.Layers Property is used to obtain all of the individual Layer objects and then add them dynamically to the existing Map Control that was defined in XAML via the Map.LayerCollection.

XAML

<UserControl x:Class="ArcGISWPFSDK.LoadWebMapDynamically"
    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" >
        <Grid.Resources>
            <LinearGradientBrush x:Key="PanelGradient" EndPoint="0.5,1" StartPoint="0.5,0">
                <LinearGradientBrush.RelativeTransform>
                    <TransformGroup>
                        <ScaleTransform CenterY="0.5" CenterX="0.5"/>
                        <SkewTransform CenterY="0.5" CenterX="0.5"/>
                        <RotateTransform Angle="176" CenterY="0.5" CenterX="0.5"/>
                        <TranslateTransform/>
                    </TransformGroup>
                </LinearGradientBrush.RelativeTransform>
                <GradientStop Color="#FF145787" Offset="0.16"/>
                <GradientStop Color="#FF3D7FAC" Offset="0.502"/>
                <GradientStop Color="#FF88C5EF" Offset="0.984"/>
            </LinearGradientBrush>
        </Grid.Resources>
        <esri:Map x:Name="MyMap" />
        <Grid HorizontalAlignment="Right" VerticalAlignment="Top" Margin="0,15,15,0">
            <Rectangle Stroke="Gray"  RadiusX="10" RadiusY="10" Fill="{StaticResource PanelGradient}" Margin="0,0,0,5" >
                <Rectangle.Effect>
                    <DropShadowEffect/>
                </Rectangle.Effect>
            </Rectangle>
            <Rectangle Fill="White" Stroke="DarkGray" RadiusX="5" RadiusY="5" Margin="10,10,0,10" HorizontalAlignment="Left" Width="359.257" />
            <StackPanel Orientation="Vertical" HorizontalAlignment="Center" Margin="0,20,30,20">
                <TextBlock FontWeight="Bold" HorizontalAlignment="Center" Text="Enter ArcGIS.com WebMap ID" Foreground="Black"/>
                <StackPanel Orientation="Horizontal" HorizontalAlignment="Left" >
                    <TextBlock Text="WebMap ID: " TextAlignment="Right" 
                               VerticalAlignment="Center" Margin="30,0,0,0" Foreground="Black"/>
                    <TextBox x:Name="WebMapTextBox" Text="00e5e70929e14055ab686df16c842ec1" Width="250"/>
                </StackPanel>
                <Button x:Name="LoadWebMapButton" Content="Load WebMap" Width="100" Margin="0,5,0,10" 
                        HorizontalAlignment="Center" Click="LoadWebMapButton_Click" />
                <TextBlock TextDecorations="underline" Text="WebMap Item Details" FontWeight="Bold"
                           Margin="30,0,0,0" Foreground="Black"/>
                <TextBlock x:Name="WebMapPropertiesTextBox" Margin="30,0,0,0" Foreground="Black" >
                    <Run FontStyle="Italic">Title: </Run>
                    <TextBlock Text="{Binding Title}" />
                    <LineBreak />
                    <Run FontStyle="Italic">Snippet: </Run>
                    <TextBlock Text="{Binding Snippet}" />
                    <LineBreak />
                    <Run FontStyle="Italic">Owner: </Run>
                    <TextBlock Text="{Binding Owner}" />
                </TextBlock>
            </StackPanel>
        </Grid>
    </Grid>
</UserControl>

C#

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

namespace ArcGISWPFSDK
{
    public partial class LoadWebMapDynamically : UserControl
    {
        public LoadWebMapDynamically()
        {
            InitializeComponent();
        }

        private void LoadWebMapButton_Click(object sender, System.Windows.RoutedEventArgs e)
        {
            if (!string.IsNullOrEmpty(WebMapTextBox.Text))
            {
                Document webMap = new Document();
                webMap.GetMapCompleted += (s, a) =>
                        {
                            if (a.Error != null)
                                MessageBox.Show(string.Format("Unable to load webmap. {0}", a.Error.Message));
                            else
                            {
                                MyMap.Extent = a.Map.Extent;

                                LayerCollection layerCollection = new LayerCollection();
                                foreach (Layer layer in a.Map.Layers)
                                    layerCollection.Add(layer);

                                a.Map.Layers.Clear();
                                MyMap.Layers = layerCollection;
                                WebMapPropertiesTextBox.DataContext = a.ItemInfo;
                            }
                        };

                webMap.GetMapAsync(WebMapTextBox.Text);
            }
        }
    }
}

VB.NET

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

Namespace ArcGISWPFSDK
    Partial Public Class LoadWebMapDynamically
        Inherits UserControl
        Public Sub New()
            InitializeComponent()
        End Sub

        Private Sub LoadWebMapButton_Click(sender As Object, e As System.Windows.RoutedEventArgs)
            If Not String.IsNullOrEmpty(WebMapTextBox.Text) Then
                Dim webMap As New Document()
                AddHandler webMap.GetMapCompleted, Function(s, a)
                                                       If a.[Error] IsNot Nothing Then
                                                           MessageBox.Show(String.Format("Unable to load webmap. {0}", a.[Error].Message))
                                                       Else
                                                           MyMap.Extent = a.Map.Extent

                                                           Dim layerCollection As New LayerCollection()
                                                           For Each layer As Layer In a.Map.Layers
                                                               layerCollection.Add(layer)
                                                           Next

                                                           a.Map.Layers.Clear()
                                                           MyMap.Layers = layerCollection
                                                           WebMapPropertiesTextBox.DataContext = a.ItemInfo
                                                       End If

                                                   End Function

                webMap.GetMapAsync(WebMapTextBox.Text)
            End If
        End Sub
    End Class
End Namespace