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Querying the Index Programmatically

There are several ways to use Windows Search to query the index.

This section provides the conceptual framework for querying the index programmatically:

Note Legacy Microsoft Windows Desktop Search (WDS) 2x compatibility: On computers running Windows XP and later, ISearchDesktop is deprecated. Instead, developers should use ISearchQueryHelper to get a connection string and to parse the user's query into Structured Query Language (SQL), and then query through Object Linking and Embedding Database (OLE DB).

Additional Resources

For information on OLE DB, see OLE DB Programming Overview. For information on the .NET Framework Data Provider for OLE DB, see the System.Data.OleDb Namespace.
For additional background on using of properties in querying, see the following topics:
- Property System
- System Properties
For information on how to create and modify search folders, see ISearchFolderItemFactory Interface.
For community-supported question and discussion message boards on Search technologies, see MSDN Forum: Windows Desktop Search Development.
To download the Search SDK Code Samples:
- For Windows 7: Windows Search Samples on Code Gallery
- For Windows Vista: Windows Search SDK Samples
To download the Windows SDK:
- For Windows 7: Windows SDK for Windows 7 and .NET Framework
- For Windows Vista: Windows SDK for Windows Vista and .NET Framework

Related topics

Windows Search Development Guide
Managing the Index
Extending the Windows Search Index
Extending Language Resources

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Build date: 2/14/2012

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FAQ

Querying Index on External Drive

Hi. I have indexed my external FAT32 hard drive. I did this by applying Microsofts hotfix to allow indexing of UNC paths. All appeared to go well and it said that the files were indexed successfully. However when I try to programatically access the index I only get results returned from the internally indexed folder but not the external one. Anyone know how to resolve this one?

thank you.

History

6/3/2010
ifflanb

Specifing SCOPE Prevents Adding Additional Constraints

When using the SCOPE or DIRECTORY constraints, other constraints cannot be considered.
For example:

"SELECT System.ItemUrl FROM SYSTEMINDEX.. SCOPE() WHERE SCOPE='file:c:Users/User1' AND System.Keywords='someKeyWords'

Any solution would be appreciated.

History

12/21/2009
miridfd

ADO.NET and C# code sample wrong

The ADO.NET and C# code sample does not work unless you use the connection string from the Visual Basic sample.

The recommended way to get the correct connection string is to use the QueryHelper Object get_ConnectionString() method (see http://msdn2.microsoft.com/en-us/library/bb266518(VS.85).aspx for sample code)

History

9/24/2007
JChung2007

12/26/2007
Thermous