Prevent FeatureDataGrid from selecting the first row after panning the map

MarkJagt

Does anyone know how I can prevent the first row in the FeatureDataGrid from being selected after a panning action has been performed on the Map?

When my application starts, nothing is selected in the FeatureDataGrid. But as soon as I pan the map, the first row in the FeatureDataGrid is selected. I can repeat this behavior in the sample found here: http://help.arcgis.com/en/webapi/silverlight/samples/start.htm#ToolkitFeatureDataGrid.

In the sample this behavior happens only once, but in my application it continues selecting the first row after panning, even if I clear the selection in between the panning actions. The 'first row selection' does not happen when I zoom in or out on the map.

Any ideas?

Regards,
Mark

AliMirzabeigi

Mark,

Thank you for your posting. We are currently looking into this problem. In the meantime you can have a variable to keep track of the selection count whenever there is a change in your feature layer graphics collection AND the selection in your layer.

You should clear the selection when:
1. There was no selection in your layer previously, AND
2. Current selection count is equal to 1

Your code whould be something similar to the following code snippet:

int selectedCount; // Variable to keep track of the selection count in FeatureLayer

public YourUserControlClassConstructor()
{
  InitializeComponent();
  
  FeatureLayer featureLayer = MyMap.Layers["MyFeatureLayer"] asFeatureLayer;
  featureLayer.Graphics.CollectionChanged += Graphics_CollectionChanged;
  selectedCount = featureLayer.SelectionCount;
}
 
privatevoid Graphics_CollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
{
  if (selectedCount == 0 /* No selections before */
      && MyDataGrid.SelectedItems.Count == 1 /* Unwanted selection after the change in graphics collection */)
  MyDataGrid.SelectedItems.Clear();
  selectedCount = MyDataGrid.SelectedItems.Count;
}

Hope this helps.