/// <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(nameof(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);
}
}
}
public static SearchCondition ParseStructuredQuery(string query, CultureInfo cultureInfo)
{
Contract.Requires <ArgumentException>(!String.IsNullOrEmpty(query));
ICondition result = null;
var nativeQueryParserManager = (IQueryParserManager) new QueryParserManagerCoClass();
IQueryParser queryParser = null;
IQuerySolution querySolution = null;
IEntity mainType = null;
SearchCondition searchCondition = null;
try
{
// IQueryParser作成
var guid = new Guid(SearchIID.IQueryParser);
var hr = nativeQueryParserManager.CreateLoadedParser(
"SystemIndex",
cultureInfo == null ? (ushort)0 : (ushort)cultureInfo.LCID,
ref guid,
out queryParser);
if (HRESULT.Failed(hr))
{
throw ShellException.FromHRESULT(hr);
}
if (queryParser != null)
{
var optionValue = PropVariant.FromObject(true);
try
{
hr = queryParser.SetOption(STRUCTURED_QUERY_SINGLE_OPTION.SQSO_NATURAL_SYNTAX, optionValue);
if (HRESULT.Failed(hr))
{
throw ShellException.FromHRESULT(hr);
}
}
finally
{
optionValue.Clear();
}
hr = queryParser.Parse(query, null, out querySolution);
if (HRESULT.Failed(hr))
{
throw ShellException.FromHRESULT(hr);
}
if (querySolution != null)
{
hr = querySolution.GetQuery(out result, out mainType);
if (HRESULT.Failed(hr))
{
throw ShellException.FromHRESULT(hr);
}
}
}
searchCondition = new SearchCondition(result);
}
catch
{
searchCondition?.Dispose();
throw;
}
finally
{
Marshal.ReleaseComObject(nativeQueryParserManager);
if (queryParser != null)
{
Marshal.ReleaseComObject(queryParser);
}
if (querySolution != null)
{
Marshal.ReleaseComObject(querySolution);
}
if (mainType != null)
{
Marshal.ReleaseComObject(mainType);
}
}
return(searchCondition);
}
