Jennifer. Thanks again for all the replies. I started over straight with the Spatial Query SDK because my code was twisted and I had a bunch of extra stuff that was getting more confused.I add the two xaml code snippits exactly how you wrote them. The I tried to implement your code behind but app hangs and I do get the error warning about ObservableCollection<FeatureLayer> layers; - is never assigned and always has a defualt value of null.....I'm sorry but what I'm I missing.
public partial class MainPage : UserControl
{
private Draw MyDrawSurface;
ObservableCollection<FeatureLayer> layers;
public MainPage()
{
InitializeComponent();
string baseUrl = "http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer";
for (int i = 0; i <= 5; i++)
{
FeatureLayer featureLayer = new FeatureLayer() { Url = string.Format("{0}/{1}", baseUrl, i) };
featureLayer.Initialize();
layers.Add(featureLayer);
}
Layers.ItemsSource = layers;
Layers.SelectedIndex = 0;
MyDrawSurface = new Draw(MyMap)
{
LineSymbol = LayoutRoot.Resources["DefaultLineSymbol"] as SimpleLineSymbol,
FillSymbol = LayoutRoot.Resources["DefaultFillSymbol"] as FillSymbol
};
MyDrawSurface.DrawComplete += MyDrawSurface_DrawComplete;
}
private void esriTools_ToolbarItemClicked(object sender, ESRI.ArcGIS.Client.Toolkit.SelectedToolbarItemArgs e)
{
switch (e.Index)
{
case 0: // Point
MyDrawSurface.DrawMode = DrawMode.Point;
break;
case 1: // Polyline
MyDrawSurface.DrawMode = DrawMode.Polyline;
break;
case 2: // Polygon
MyDrawSurface.DrawMode = DrawMode.Polygon;
break;
case 3: // Rectangle
MyDrawSurface.DrawMode = DrawMode.Rectangle;
break;
default: // Clear
MyDrawSurface.DrawMode = DrawMode.None;
GraphicsLayer selectionGraphicslayer = MyMap.Layers["MySelectionGraphicsLayer"] as GraphicsLayer;
selectionGraphicslayer.ClearGraphics();
QueryDetailsDataGrid.ItemsSource = null;
ResultsDisplay.Visibility = Visibility.Collapsed;
break;
}
MyDrawSurface.IsEnabled = (MyDrawSurface.DrawMode != DrawMode.None);
StatusTextBlock.Text = e.Item.Text;
}
private void MyDrawSurface_DrawComplete(object sender, ESRI.ArcGIS.Client.DrawEventArgs args)
{
GraphicsLayer selectionGraphicslayer = MyMap.Layers["MySelectionGraphicsLayer"] as GraphicsLayer;
selectionGraphicslayer.ClearGraphics();
QueryTask queryTask = new QueryTask((Layers.SelectedItem as FeatureLayer).Url);
//... more code here
queryTask.ExecuteCompleted += QueryTask_ExecuteCompleted;
queryTask.Failed += QueryTask_Failed;
// Bind data grid to query results
Binding resultFeaturesBinding = new Binding("LastResult.Features");
resultFeaturesBinding.Source = queryTask;
QueryDetailsDataGrid.SetBinding(DataGrid.ItemsSourceProperty, resultFeaturesBinding);
Query query = new ESRI.ArcGIS.Client.Tasks.Query();
// Specify fields to return from query
//query.OutFields.AddRange(new string[] { "STATE_NAME", "SUB_REGION", "STATE_FIPS", "STATE_ABBR", "POP2000", "POP2007" });
//
query.OutFields.Add("*");
query.Geometry = args.Geometry;
// Return geometry with result features
query.ReturnGeometry = true;
queryTask.ExecuteAsync(query);
}
private void QueryTask_ExecuteCompleted(object sender, ESRI.ArcGIS.Client.Tasks.QueryEventArgs args)
{
FeatureSet featureSet = args.FeatureSet;
if (featureSet == null || featureSet.Features.Count < 1)
{
MessageBox.Show("No features retured from query");
return;
}
GraphicsLayer graphicsLayer = MyMap.Layers["MySelectionGraphicsLayer"] as GraphicsLayer;
if (featureSet != null && featureSet.Features.Count > 0)
{
foreach (Graphic feature in featureSet.Features)
{
feature.Symbol = LayoutRoot.Resources["ResultsFillSymbol"] as FillSymbol;
graphicsLayer.Graphics.Insert(0, feature);
}
ResultsDisplay.Visibility = Visibility.Visible;
}
MyDrawSurface.IsEnabled = false;
}
private void QueryTask_Failed(object sender, TaskFailedEventArgs args)
{
MessageBox.Show("Query failed: " + args.Error);
}
private void GraphicsLayer_MouseEnter(object sender, GraphicMouseEventArgs args)
{
QueryDetailsDataGrid.Focus();
QueryDetailsDataGrid.SelectedItem = args.Graphic;
QueryDetailsDataGrid.CurrentColumn = QueryDetailsDataGrid.Columns[0];
QueryDetailsDataGrid.ScrollIntoView(QueryDetailsDataGrid.SelectedItem, QueryDetailsDataGrid.Columns[0]);
}
private void GraphicsLayer_MouseLeave(object sender, GraphicMouseEventArgs args)
{
QueryDetailsDataGrid.Focus();
QueryDetailsDataGrid.SelectedItem = null;
}
private void QueryDetailsDataGrid_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
foreach (Graphic g in e.AddedItems)
g.Select();
foreach (Graphic g in e.RemovedItems)
g.UnSelect();
}
private void QueryDetailsDataGrid_LoadingRow(object sender, DataGridRowEventArgs e)
{
e.Row.MouseEnter += Row_MouseEnter;
e.Row.MouseLeave += Row_MouseLeave;
}
void Row_MouseEnter(object sender, MouseEventArgs e)
{
(((System.Windows.FrameworkElement)(sender)).DataContext as Graphic).Select();
}
void Row_MouseLeave(object sender, MouseEventArgs e)
{
DataGridRow row = sender as DataGridRow;
Graphic g = ((System.Windows.FrameworkElement)(sender)).DataContext as Graphic;
if (!QueryDetailsDataGrid.SelectedItems.Contains(g))
g.UnSelect();
}
}
}
