topic Unique attribute values in ArcGIS API for Silverlight Questions

Unique attribute values

ManojrajTeli — Fri, 26 Aug 2011 08:09:56 GMT

Is it possible to get unique values for attributes of the feature.Thank you in advance

Re: Unique attribute values

TerryGiles — Sat, 11 Dec 2021 07:07:47 GMT

Do you need the unique values for just one feature or from a given attribute in several features?

If you just want the unique values across all attributes in one feature you could do something like this -

                    List<string> values = new List<string>();
                    foreach (var item in feature.Attributes)
                    {
                        if (!values.Contains(item.Value.ToString()))
                        {
                            values.Add(item.Value.ToString());
                        }
                    }

If you need to get the unique values from a series of features see this forum thread -

http://forums.arcgis.com/threads/36312-Attribute-Query-Distinct-values?p=127568#post127568. It's not fast if you have a large number of features to handle but it works.

Terry

Re: Unique attribute values

JenniferNery — Sat, 27 Aug 2011 01:58:47 GMT

You may also use Distinct() in System.Linq as in Post# 10 of this thread: http://forums.arcgis.com/threads/16305-Attribute-Query-Task-Question