I did some more searching and came across this suggestion by Jennifer...see this post #8http://forums.arcgis.com/threads/23731-Problem-with-Date-attribute-fieldJennfier and Ali pointed out use FeatureLayer to assign to FeatureDataGrid.GraphicsLayer property if you want to preserve field information, instead of performing a QueryTask and then putting results to a GraphicsLayer. You can still perform queries using FeatureLayer by updating Where clause.
So i'm having a little trouble taking Jennifer's suggestion, digesting it, and implementing it. I'm hoping someone can point me a direction with some sample code. Below I'll post my spatial query code.XAML declare my feature layer
<esri:FeatureLayer ID="MAINPOINTS" DisableClientCaching="True"
AutoSave="False"
Url="http://myserver/ArcGIS/rest/services/gdb/FeatureServer/0"
OutFields="*" Mode="OnDemand">
Here's my xaml for my featureTableGrid
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="15" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<TextBlock x:Name="DataDisplayTitle" Text="Search Results" FontSize="9" Grid.Row="0" FontWeight="Bold" FontFamily="Arial" Foreground="#FFFFFFFF" />
<esriWidgets:FeatureDataGrid Grid.Row="1" x:Name="QueryDetailsDataGrid" Height="170"
Map="{Binding ElementName=Map}"
GraphicsLayer="{Binding Layers[MySelectionGraphicsLayer], ElementName=Map}" Style="{StaticResource FeatureDataGridStyle1}" />
</Grid>
Here's my code behind to set my active layer, which works with my Attribute and Spatial Select
string baseUrl = "http://myserver/ArcGIS/rest/services/gdb/MapServer";
for (int i = 0; i <= 1; i++)
{
FeatureLayer featureLayer = new FeatureLayer() { Url = string.Format("{0}/{1}", baseUrl, i) };
featureLayer.Initialize();
layers.Add(featureLayer);
}
//layers.RemoveAt(1);
Layers.ItemsSource = layers;
Layers.SelectedIndex = 0;
Here's my Code Behind for my Spatial Selection
#region Spatial Query
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 = Map.Layers["MySelectionGraphicsLayer"] as GraphicsLayer;
selectionGraphicslayer.ClearGraphics();
QueryDetailsDataGrid.ItemsSource = null;
ResultsDisplay.IsExpanded = false;
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 = Map.Layers["MySelectionGraphicsLayer"] as GraphicsLayer;
selectionGraphicslayer.ClearGraphics();
QueryTask queryTask = new QueryTask((Layers.SelectedItem as FeatureLayer).Url);
queryTask.ExecuteCompleted += QueryTask_ExecuteCompleted;
queryTask.Failed += QueryTask_Failed;
Query query = new ESRI.ArcGIS.Client.Tasks.Query();
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 = Map.Layers["MySelectionGraphicsLayer"] as GraphicsLayer;
if (featureSet != null && featureSet.Features.Count > 0)
// ResultsDisplay.Visibility = Visibility.Visible;
{
foreach (Graphic feature in featureSet.Features)
{
switch (featureSet.GeometryType.ToString())
{
case "Polygon":
feature.Symbol = LayoutRoot.Resources["ResultsFillSymbol"] as FillSymbol;
break;
case "Polyline":
feature.Symbol = LayoutRoot.Resources["CustomGrowLineSymbol"] as LineSymbol;
break;
case "Point":
feature.Symbol = LayoutRoot.Resources["ResultsMarkerSymbol"] as SimpleMarkerSymbol;
break;
}
graphicsLayer.Graphics.Insert(0, feature);
}
ResultsDisplay.IsExpanded = true;
}
MyDrawSurface.IsEnabled = false;
}
private void QueryTask_Failed(object sender, TaskFailedEventArgs args)
{
MessageBox.Show("Query failed: " + args.Error);
}
#endregion
Thanks for taking a look.Christine
