Feature Layer Count based on layer created from selection

ChrisRobles

Hi, 

Is it possible to get the current count of a feature layer without using the underlying feature class or having to iterate through a search and incrementing a counter? I have a layer that was created using a selection and I've tried getting the count of that layer but it only displays the count based on the underlying feature class.

Wolf

I don't see another way, however, i think processing will be fast since the layer data is cached in memory.  Here is my sample:

3141 records in 0.017 seconds.  

These are the code changes to measure the timing:

// 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;
    var timer = new Stopwatch();
    timer.Start(); 
    while (rowCursor.MoveNext())
    {
      rowCount++;
    }
    timer.Stop();
    var elapsedTime = timer.Elapsed;
    result.AppendLine($"{layer.Name}: {rowCount} rows  {elapsedTime:m\\:ss\\.fff} min.");
  }
});
// Show the result in a message box
MessageBox.Show(result.ToString(), "Row Count Results", System.Windows.MessageBoxButton.OK, System.Windows.MessageBoxImage.Information);