Hi,
I assume you are using .NET API. This needs SearchCondition group. It is "AND” within one group. It is "OR" among groups. The code below is tested with the SDK sample model: gatehouse.nwd.
//Create a new search
Search s = new Search();
s.Selection.SelectAll();
//SearchCondition1 of group1:the item is required
SearchCondition oGroup1_SC1 = SearchCondition.HasPropertyByDisplayName("Item", "Required");
oGroup1_SC1 = oGroup1_SC1.EqualValue( VariantData.FromBoolean(true));
//SearchCondition2 of group1:the item's DWG handle is 16C17
SearchCondition oGroup1_SC2 = SearchCondition.HasPropertyByDisplayName("Entity Handle", "Value");
oGroup1_SC2= oGroup1_SC2.EqualValue( VariantData.FromDisplayString("16C17"));
//SearchCondition1 of group2: the item is NOT required
SearchCondition oGroup2_SC1= SearchCondition.HasPropertyByDisplayName("Item", "Required");
oGroup2_SC1 = oGroup2_SC1.EqualValue(VariantData.FromBoolean(false));
//SearchCondition2 of group2: the item's DWG handle is 17C2E
SearchCondition oGroup2_SC2 = SearchCondition.HasPropertyByDisplayName("Entity Handle", "Value");
oGroup2_SC2 = oGroup2_SC2.EqualValue(VariantData.FromDisplayString("17C2E"));
//create group1
System.Collections.Generic.List<SearchCondition> oG1 = new System.Collections.Generic.List<SearchCondition>();
oG1.Add(oGroup1_SC1);
oG1.Add(oGroup1_SC2);
//create group2
System.Collections.Generic.List<SearchCondition> oG2 = new System.Collections.Generic.List<SearchCondition>();
oG2.Add(oGroup2_SC1);
oG2.Add(oGroup2_SC2);
// add groups to SearchConditions
s.SearchConditions.AddGroup(oG1);
s.SearchConditions.AddGroup(oG2);
//highlight the items
ModelItemCollection searchResults = s.FindAll(Autodesk.Navisworks.Api.Application.ActiveDocument
Regards,
Xiaodong Liang
Developer Technical Services