If you select all features in the newly created layer you can use GetSelection () and the selection count on the layer, otherwise you have to use a RowCursor on the FeatureLayer itself (not on the underlying FeatureClass or Table):
try
{
// get all feature layers in the current map
var map = MapView.Active.Map;
if (map == null)
{
MessageBox.Show("No active map found.", "Error", System.Windows.MessageBoxButton.OK, System.Windows.MessageBoxImage.Error);
return;
}
var featureLayers = map.GetLayersAsFlattenedList().OfType<FeatureLayer>().ToList();
if (featureLayers.Count == 0)
{
MessageBox.Show("No feature layers found in the active map.", "Information", System.Windows.MessageBoxButton.OK, System.Windows.MessageBoxImage.Information);
return;
}
// count rows in each feature layer
StringBuilder result = new StringBuilder();
await QueuedTask.Run(() =>
{
foreach (FeatureLayer layer in featureLayers)
{
// Get the row count for the feature layer
// this is not working since it is getting the underlying table (which has all records in
// the case where a layer is created with a 'select' clause
// long rowCount = layer.GetTable().GetCount();
// create a cursor for the layer (not the table)
var rowCursor = layer.Search();
long rowCount = 0;
while (rowCursor.MoveNext())
{
rowCount++;
}
result.AppendLine($"{layer.Name}: {rowCount} rows");
}
});
// Show the result in a message box
MessageBox.Show(result.ToString(), "Row Count Results", System.Windows.MessageBoxButton.OK, System.Windows.MessageBoxImage.Information);
}
catch (Exception ex)
{
MessageBox.Show($"An error occurred: {ex.Message}", "Error", System.Windows.MessageBoxButton.OK, System.Windows.MessageBoxImage.Error);
}
