public FeatureLayerHelper(Map map, string name, FeatureLayer.QueryMode mode, bool visible)
{
this.FeatureLayer = (FeatureLayer)map.Layers.FirstOrDefault(layer => (layer is FeatureLayer) && ((FeatureLayer)layer).DisplayName.ToLower().Equals(name.ToLower()));
if (this.FeatureLayer == null)
{
Log.Trace("Could not find layer with name '" + name + "'");
return;
}
this.FeatureLayer.Visible = visible;
this.FeatureLayer.Mode = mode;
this.FeatureLayer.AutoSave = false;
this.Fields = QueryLayerFields(this.FeatureLayer);
if (this.Fields == null)
{
Log.Trace("Could not query layer fields '" + name + "'");
}
this.FeatureLayer.Initialized += FeatureLayer_Initialized;
this.FeatureLayer.Initialize();
this.FeatureLayer.BeginSaveEdits += FeatureLayer_BeginSaveEdits;
this.FeatureLayer.EndSaveEdits += FeatureLayer_EndSaveEdits;
this.FeatureLayer.UpdateCompleted += FeatureLayer_UpdateCompleted;
this.FeatureLayer.UpdateFailed += FeatureLayer_UpdateFailed;
this.FeatureLayer.SaveEditsFailed += FeatureLayer_SaveEditsFailed;
}
/// <summary>
/// Converts bool to QueryMode.
/// </summary>
/// <returns>True=OnDemand, False=SnapShot</returns>
public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
{
FeatureLayer.QueryMode mode = FeatureLayer.QueryMode.Snapshot;
var checkedVal = (bool)value;
var param = parameter as string;
if (param == "OnDemand")
{
mode = checkedVal ? FeatureLayer.QueryMode.OnDemand : FeatureLayer.QueryMode.Snapshot;
}
return(mode);
}
//Workaround for issue in core api. Once geometry is being removed from the query string once the mode changes, we can remove this code
void OnModeChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
{
FeatureLayer layer = Layer as FeatureLayer;
if (layer != null)
{
FeatureLayer.QueryMode oldMode = (FeatureLayer.QueryMode)e.OldValue;
FeatureLayer.QueryMode newMode = (FeatureLayer.QueryMode)e.NewValue;
if (oldMode != newMode)
{
if (oldMode == FeatureLayer.QueryMode.OnDemand && newMode == FeatureLayer.QueryMode.Snapshot)
{
layer.Geometry = null;
}
if (newMode == FeatureLayer.QueryMode.Snapshot ||
newMode == FeatureLayer.QueryMode.OnDemand)
{
// We only need to make sure the client caching is off while we
// do this update, and then return it to the original state.
bool cachingDisabled = layer.DisableClientCaching;
if (!cachingDisabled)
{
layer.DisableClientCaching = true;
}
layer.Update();
if (!cachingDisabled)
{
layer.DisableClientCaching = false;
}
}
}
}
}
