Generating parameter lists for tools in Arc10

TylerQuick

I am trying to create a custom tool in AcrMap 10 that baically allows me to do a select by attribute within the tool.  I have a database of river features and want to select features using the river name listed in a column in the attribute table.  I can get the tool to the point where, when run, it will prompt me for river name and I can manually type it in and that works, but is there a way to populate a list of options for the parameter so I don't have to know the exact form of the river name to use the tool?  Any help would be appreciated.

GeorgeFaraj

If you just want to read the data  from your feature layer then dataStatistics.UniqueValues can be walked using .MoveNext() after this query:

ICursor cursor = geoFeatureLayer.Search( null, false ) as ICursor;
IDataStatistics dataStatistics = new DataStatisticsClass();
dataStatistics.Field = fieldName;
dataStatistics.Cursor = cursor;
dataStatistics.UniqueValues.Reset();

The fieldName would be the RiverName field (or whatever it is called.)

I should add that if a MapControl is passed as your hookhelper then you can pass data to the tool or command using the CustomProperty field.