I basically started out with Identify on ESRI sample site, see second posting for link On my site I have an Identify button that the user clicks to turn identify on and off. Using the code that Jennifer supplied I modified it as follows:namespace SilverlightApplication1
{
public partial class MainPage : UserControl
{
// Used by Identify
private List<DataItem> _dataItems = null;
bool IdentifyButtonClicked = false;
private bool _needReset = true; //***
bool IdentifyResultsPanelVisible = false;
private IdentifyTask identifyTask = new IdentifyTask();
public Stack<string> myMapService = new Stack<string>();
...
In the public MainPage I added the event handler:public MainPage()
{
InitializeComponent();
identifyTask.ExecuteCompleted +=new EventHandler<IdentifyEventArgs>(identifyTask_ExecuteCompleted);
identifyTask.Failed +=new EventHandler<TaskFailedEventArgs>(identifyTask_Failed);
UpdateMapServices(); //** This finds all dynamic map services I am using
}UpdateMapServices: Defines all dynamic map services that I am using
//** Used by Identify
private void UpdateMapServices()
{
Stack<string> myTempStack = new Stack<string>();
foreach (Layer layer in MyMap.Layers)
{
ArcGISDynamicMapServiceLayer dynamicLayer = layer as ArcGISDynamicMapServiceLayer;
if (dynamicLayer != null)
{
myTempStack.Push(dynamicLayer.Url.ToString());
}
}
// Reverse stack order to reflect layers as drawn
while (myTempStack.Count != 0)
{
myMapService.Push(myTempStack.Pop().ToString());
}
}The MouseClick had been modified as follows:
private void QueryPoint_MouseClick(object sender, Map.MouseEventArgs e)
{
if (IdentifyButtonClicked == true) //*** Used by my IdentifyButton
{
if (IdentifyResultsPanelVisible)
{
IdentifyResultsPanel.Visibility = Visibility.Collapsed;
}
MapPoint clickPoint = e.MapPoint;
IdentifyParameters identifyParams = new IdentifyParameters()
{
Geometry = clickPoint,
Tolerance = 20,
MapExtent = MyMap.Extent,
Width = (int)MyMap.ActualWidth,
Height = (int)MyMap.ActualHeight,
LayerOption = LayerOption.all,
SpatialReference = MyMap.SpatialReference
};
identifyTask.Url = myMapService.Pop();
identifyTask.ExecuteAsync(identifyParams, identifyParams);
MyMap.Cursor = Cursors.Wait;
// _needReset is a flag used to determine if the user clicks on the map to a new identify
_needReset = true; //***
if (_needReset) //***
{
GraphicsLayer graphicsLayer = MyMap.Layers["MyGraphicsLayer"] as GraphicsLayer;
graphicsLayer.ClearGraphics();
ESRI.ArcGIS.Client.Graphic graphic = new ESRI.ArcGIS.Client.Graphic()
{
Geometry = clickPoint,
Symbol = MapRow.Resources["DefaultPictureSymbol"] as ESRI.ArcGIS.Client.Symbols.Symbol
};
graphicsLayer.Graphics.Add(graphic);
}
}
}Showfeature modified as follows:public void ShowFeature(List<IdentifyResult> results)
{
// if true new identify is being requested, need to setup new list and clear identifyCombobox
if (_needReset) {
_dataItems = new List<DataItem>();
IdentifyComboBox.Items.Clear(); //***
_needReset = false;
}
if (results != null && results.Count > 0)
{
foreach (IdentifyResult result in results)
{
Graphic feature = result.Feature;
string tempLayerName = "(" + result.LayerName + ")";
string title = tempLayerName.PadRight(20, ' ') +"|" + result.Value.ToString();// formatting
_dataItems.Add(new DataItem()
{
Title = title,
Data = feature.Attributes
});
IdentifyComboBox.Items.Add(title);
}
IdentifyComboBox.SelectedIndex = 0;
}
}Once the IdentifyTask has been executed once(for the first dynamicMapService) you need to see if their is another dynamicMapservice
void identifyTask_ExecuteCompleted(object sender, IdentifyEventArgs e)
{
if (_needReset) //If this is a new identify request then
{
IdentifyDetailDataGrid.ItemsSource = null; // clear datagrid
}
if (e.IdentifyResults != null && e.IdentifyResults.Count > 0)
{
ShowFeature(e.IdentifyResults);
}
else
{
IdentifyComboBox.Items.Clear();
IdentifyComboBox.UpdateLayout();
IdentifyResultsPanel.Visibility = Visibility.Collapsed;
IdentifyResultsPanelVisible = false;
}
if (myMapService.Count == 0) // once all map services had been identify then:
{
UpdateMapServices(); // re-populate the stack
MyMap.Cursor = Cursors.Stylus; // set stylus
IdentifyResultsPanel.Visibility = Visibility.Visible; // show result panel
IdentifyResultsPanelVisible = true; // set flag to true
}
else
{
identifyTask.Url = myMapService.Pop(); // get next dynamicMapService url for identify
IdentifyParameters identifyParams = e.UserState as IdentifyParameters; // pass in userstate
identifyTask.ExecuteAsync(identifyParams, identifyParams); // execute
}
}The Identify Grid is put in a stackpanel <!--Identify-->
<StackPanel x:Name="IdentifyStackPanel" Orientation="Vertical">
<Border x:Name="IdentifyBorder" Background="#77919191" BorderThickness="1" CornerRadius="5"
HorizontalAlignment="Left" BorderBrush="Gray" VerticalAlignment="Top" Margin="5">
<Border.Effect>
<DropShadowEffect/>
</Border.Effect>
<Grid x:Name="IdentifyGrid" HorizontalAlignment="Right" VerticalAlignment="Top" >
<Grid.RowDefinitions>
<RowDefinition Height="30" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<TextBlock x:Name="DataDisplayTitleBottom" Text="Click on map to Identify a feature"
Foreground="White" FontSize="10" Grid.Row="0"
Margin="15,5,15,1" HorizontalAlignment="Center" >
<TextBlock.Effect>
<DropShadowEffect />
</TextBlock.Effect>
</TextBlock>
<Grid x:Name="IdentifyResultsPanel" Margin="5,1,5,5" HorizontalAlignment="Center"
VerticalAlignment="Top" Visibility="Collapsed" Grid.Row="1">
<Grid.RowDefinitions>
<RowDefinition Height="30" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<ComboBox x:Name="IdentifyComboBox" SelectionChanged="cb_SelectionChanged"
Margin="5,1,5,5" Grid.Row="0" FontFamily="Consolas" FontSize="12" Foreground="Brown">
</ComboBox>
<ScrollViewer HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto"
Width="330" MinHeight="200" Grid.Row="1">
<slData:DataGrid x:Name="IdentifyDetailDataGrid" AutoGenerateColumns="False" HeadersVisibility="None"
Background="White">
<slData:DataGrid.Columns>
<!--Shows field names*****-->
<slData:DataGridTextColumn Binding="{Binding Path=Key}" FontWeight="Bold"/>
<!--Shows field values*****-->
<slData:DataGridTextColumn Binding="{Binding Path=Value}" />
</slData:DataGrid.Columns>
</slData:DataGrid>
</ScrollViewer>
</Grid>
</Grid>
</Border>
</StackPanel>Hope this help
