Issue on Getting Attributes at Query Only in ArcGIS Runtime SDK for .NET

BehrouzHosseini — Sat, 11 Dec 2021 15:27:07 GMT

Trying to Query an ESRI MapService through ArcGIS Runtime .NET SDK 10.2.7 (Using this sample)

 private async void QueryButton_Click(object sender, RoutedEventArgs e)
        {
            try
            {
                await RunQuery();
            }
            catch (System.Exception ex)
            {
                MessageBox.Show(ex.Message, "Error");
            }
        }
        private async Task RunQuery()
        {
            try
            {
                QueryTask queryTask = new QueryTask(
                    new Uri("http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Demographics/ESRI_Census_USA/MapServer/5"));

                Query query = new Query(StateNameTextBox.Text);
                query.OutFields.Add("STATE_NAME");

                var result = await queryTask.ExecuteAsync(query);
               itemListView.ItemsSource = result.FeatureSet.Features.OrderBy(g => g.Attributes["STATE_NAME"]);
            }
            catch (TaskCanceledException) { }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message, "Error");
            }
        }
    }‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

but in result I am getting Esri.ArcGISRuntime.Layers.Graphic instead of the name of the states!

Can you please let me know why this is happening and how can I fix it?

Re: Issue on Getting Attributes at Query Only in ArcGIS Runtime SDK for .NET

GregDeStigter — Sat, 11 Dec 2021 15:27:09 GMT

I think you're missing a `Select` on your Linq statement. Try this:

itemListView.ItemsSource = result.FeatureSet.Features.OrderBy(g => g.Attributes["STATE_NAME"])
.Select(g => g.Attributes["STATE_NAME"]);
‍‍

That should give you the state name attributes instead of the actual Graphic / Feature containers.

topic Re: Issue on Getting Attributes at Query Only in ArcGIS Runtime SDK for .NET in .NET Maps SDK Questions

Issue on Getting Attributes at Query Only in ArcGIS Runtime SDK for .NET

Re: Issue on Getting Attributes at Query Only in ArcGIS Runtime SDK for .NET