using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Windows.Forms;

using System.Text;

using Autodesk.Navisworks.Api.Controls;

      //This sample should be tried with the GateHouse sample drawing,
      public static void NamedConstantSearch()
      {
         //Create a new search object
         Search s = new Search();

         //Add our search condition
         s.SearchConditions.Add(
             new SearchCondition(
                 new NamedConstant("LcOaNode", "Item"),
                 new NamedConstant("LcOaNodeHidden", "Hidden"),
                 SearchConditionOptions.StartGroup,
                 SearchConditionComparison.Equal,
                 VariantData.FromBoolean(false)
                 )
             );
         //Note, this particular search would be better acheived using other methods than NamedConstant
         //and is purely to demonstrate NamedConstant usage.
         //for example a better form of the same query would be:
         //s.SearchConditions.Add(
         //    SearchCondition.HasPropertyByName(PropertyCategoryNames.Item, DataPropertyNames.ItemHidden)
         //          .EqualValue(VariantData.FromBoolean(false)));
         // 
         // 

         //Set the selection which we wish to search
         s.Selection.SelectAll();
         s.Locations = SearchLocations.DescendantsAndSelf;

         //halt searching below ModelItems which match this
         s.PruneBelowMatch = true;

         //get the resulting collection by applying this search
         ModelItemCollection searchResults = s.FindAll(Autodesk.Navisworks.Api.Application.ActiveDocument, false);

         StringBuilder output = new StringBuilder();
         output.AppendLine("Found the following:");

         //show the results
         foreach (ModelItem mi in searchResults)
         {
            output.AppendLine(mi.ToString());
         }
         MessageBox.Show(output.ToString());
      }

using Autodesk.Navisworks.Api.Controls;

         //Create a new search
         Search s = new Search();

         //set the selection to everything
         s.Selection.SelectAll();

         //Add a search condition
         s.SearchConditions.Add(SearchCondition.HasCategoryByName(PropertyCategoryNames.Geometry));

         try
         {
            //get the resulting collection by applying this search
            ModelItemCollection searchResults = s.FindAll(Autodesk.Navisworks.Api.Application.ActiveDocument, true);

            //Select the items in the model that are contained in the collection
            Autodesk.Navisworks.Api.Application.ActiveDocument.CurrentSelection.CopyFrom(searchResults);
         }
         catch (CanceledOperationException)
         {
            //the user cancelled the search
         }