/// <summary>
/// Create a simple search folder. Once the appropiate parameters are set,
/// the search folder can be enumerated to get the search results.
/// </summary>
/// <param name="searchCondition">Specific condition on which to perform the search (property and expected value)</param>
/// <param name="searchScopePath">List of folders/paths to perform the search on. These locations need to be indexed by the system.</param>
public ShellSearchFolder(SearchCondition searchCondition, params string[] searchScopePath) {
CoreHelpers.ThrowIfNotVista();
NativeSearchFolderItemFactory = (ISearchFolderItemFactory)new SearchFolderItemFactoryCoClass();
if (searchScopePath != null && searchScopePath.Length > 0 && searchScopePath[0] != null) {
this.SearchScopePaths = searchScopePath;
}
this.SearchCondition = searchCondition;
}
/// <summary>
/// Create a simple search folder. Once the appropriate parameters are set,
/// the search folder can be enumerated to get the search results.
/// </summary>
/// <param name="searchCondition">Specific condition on which to perform the search (property and expected value)</param>
/// <param name="searchScopePath">List of folders/paths to perform the search on. These locations need to be indexed by the system.</param>
public ShellSearchFolder(SearchCondition searchCondition, params ShellContainer[] searchScopePath) {
CoreHelpers.ThrowIfNotVista();
NativeSearchFolderItemFactory = (ISearchFolderItemFactory)new SearchFolderItemFactoryCoClass();
this.SearchCondition = searchCondition;
if (searchScopePath != null && searchScopePath.Length > 0 && searchScopePath[0] != null) {
this.SearchScopePaths = searchScopePath.Select(cont => cont.ParsingName);
}
}
/// <summary>
/// Creates a condition node that is a logical negation (NOT) of another condition
/// (a subnode of this node).
/// </summary>
/// <param name="conditionToBeNegated">SearchCondition node to be negated.</param>
/// <param name="simplify">True to logically simplify the result if possible; False otherwise.
/// In a query builder scenario, simplyfy should typically be set to false.</param>
/// <returns>New SearchCondition</returns>
public static SearchCondition CreateNotCondition(SearchCondition conditionToBeNegated, bool simplify) {
if (conditionToBeNegated == null) {
throw new ArgumentNullException("conditionToBeNegated");
}
// Same as the native "IConditionFactory:MakeNot" method
IConditionFactory nativeConditionFactory = (IConditionFactory)new ConditionFactoryCoClass();
ICondition result;
try {
HResult hr = nativeConditionFactory.MakeNot(conditionToBeNegated.NativeSearchCondition, simplify, out result);
if (!CoreErrorHelper.Succeeded(hr)) { throw new ShellException(hr); }
} finally {
if (nativeConditionFactory != null) {
Marshal.ReleaseComObject(nativeConditionFactory);
}
}
return new SearchCondition(result);
}
/// <summary>
/// Parses an input string that contains Structured Query keywords (using Advanced Query Syntax
/// or Natural Query Syntax) and produces a SearchCondition object.
/// </summary>
/// <param name="query">The query to be parsed</param>
/// <param name="cultureInfo">The culture used to select the localized language for keywords.</param>
/// <returns>Search condition resulting from the query</returns>
/// <remarks>For more information on structured query syntax, visit http://msdn.microsoft.com/en-us/library/bb233500.aspx and
/// http://www.microsoft.com/windows/products/winfamily/desktopsearch/technicalresources/advquery.mspx</remarks>
public static SearchCondition ParseStructuredQuery(string query, CultureInfo cultureInfo) {
if (string.IsNullOrEmpty(query)) {
throw new ArgumentNullException("query");
}
IQueryParserManager nativeQueryParserManager = (IQueryParserManager)new QueryParserManagerCoClass();
IQueryParser queryParser = null;
IQuerySolution querySolution = null;
ICondition result = null;
IEntity mainType = null;
SearchCondition searchCondition = null;
try {
// First, try to create a new IQueryParser using IQueryParserManager
Guid guid = new Guid(ShellIIDGuid.IQueryParser);
HResult hr = nativeQueryParserManager.CreateLoadedParser(
"SystemIndex",
cultureInfo == null ? (ushort)0 : (ushort)cultureInfo.LCID,
ref guid,
out queryParser);
if (!CoreErrorHelper.Succeeded(hr)) { throw new ShellException(hr); }
if (queryParser != null) {
// If user specified natural query, set the option on the query parser
using (PropVariant optionValue = new PropVariant(true)) {
hr = queryParser.SetOption(StructuredQuerySingleOption.NaturalSyntax, optionValue);
}
if (!CoreErrorHelper.Succeeded(hr)) { throw new ShellException(hr); }
// Next, try to parse the query.
// Result would be IQuerySolution that we can use for getting the ICondition and other
// details about the parsed query.
hr = queryParser.Parse(query, null, out querySolution);
if (!CoreErrorHelper.Succeeded(hr)) { throw new ShellException(hr); }
if (querySolution != null) {
// Lastly, try to get the ICondition from this parsed query
hr = querySolution.GetQuery(out result, out mainType);
if (!CoreErrorHelper.Succeeded(hr)) { throw new ShellException(hr); }
}
}
searchCondition = new SearchCondition(result);
return searchCondition;
} catch {
if (searchCondition != null) { searchCondition.Dispose(); }
throw;
} finally {
if (nativeQueryParserManager != null) {
Marshal.ReleaseComObject(nativeQueryParserManager);
}
if (queryParser != null) {
Marshal.ReleaseComObject(queryParser);
}
if (querySolution != null) {
Marshal.ReleaseComObject(querySolution);
}
if (mainType != null) {
Marshal.ReleaseComObject(mainType);
}
}
}
private static SearchCondition CreateLeafCondition(string propertyName, PropVariant propVar, string valueType, SearchConditionOperation operation) {
IConditionFactory nativeConditionFactory = null;
SearchCondition condition = null;
try {
// Same as the native "IConditionFactory:MakeLeaf" method
nativeConditionFactory = (IConditionFactory)new ConditionFactoryCoClass();
ICondition nativeCondition = null;
if (string.IsNullOrEmpty(propertyName) || propertyName.ToUpperInvariant() == "SYSTEM.NULL") {
propertyName = null;
}
HResult hr = HResult.Fail;
hr = nativeConditionFactory.MakeLeaf(propertyName, operation, valueType,
propVar, null, null, null, false, out nativeCondition);
if (!CoreErrorHelper.Succeeded(hr)) {
throw new ShellException(hr);
}
// Create our search condition and set the various properties.
condition = new SearchCondition(nativeCondition);
} finally {
if (nativeConditionFactory != null) {
Marshal.ReleaseComObject(nativeConditionFactory);
}
}
return condition;
}
