Windows Search 4 Query - Delphi Example
The following web page describes querying Windows Search programmatically:
http://msdn.microsoft.com/en-u开发者_如何转开发s/library/aa965362.aspx
Does anyone have examples using Delphi/Pascal?
Examples I have in mind are fairly simple:
- Search for certain file types.
- Search for specific text within files.
- Limit these above searches to a certain path.
Here's one I did a while ago - be aware that it may be out of date:
const GENERAL_COLUMNS = '"System.Itemname", "System.Size", "System.DateCreated", "System.ItemDate",' + '"System.ItemFolderPathDisplay", "System.Search.AutoSummary", "System.ItemType"'; IMAGE_COLUMNS = '"System.Image.HorizontalSize", "System.Image.VerticalSize", '+ '"System.Image.BitDepth", "System.Image.Compression", '+ '"System.Photo.CameraModel", "System.Photo.DateTaken", "System.Photo.Flash"'; MUSIC_COLUMNS = '"System.Music.Artist", "System.Music.Genre", "System.Music.TrackNumber", '+ '"System.Audio.Compression", "System.Audio.SampleRate", '+ '"System.DRM.IsProtected", "System.Music.AlbumTitle", "System.Rating", '+ '"System.Audio.EncodingBitrate"'; procedure TWDSDataSource.RetrieveDataFromDB; var manager : ISearchManager; catalogManager : ISearchCatalogManager; queryHelper : ISearchQueryHelper; wQuery : string; temp : PWideChar; sTemp : string; begin manager := CoCSearchManager.Create; if Succeeded(manager.GetCatalog('SystemIndex',catalogManager)) then begin if Succeeded(catalogManager.GetQueryHelper(queryHelper)) then begin if fMaxResults 0 then queryHelper.Set_QueryMaxResults(fMaxResults); queryHelper.Set_QuerySelectColumns(GENERAL_COLUMNS + ',' + MUSIC_COLUMNS + ',' + IMAGE_COLUMNS); queryHelper.GenerateSQLFromUserQuery(PWideChar(fQuery),temp); wQuery := temp; queryHelper.Get_ConnectionString(temp); sTemp := temp; dataset := CreateComObject(CLASS_Recordset) as _Recordset; dataset.CursorLocation := adUseClient; dataset.Open(wQuery, stemp, adOpenForwardOnly, adLockReadOnly, adCmdText); dataset.Set_ActiveConnection(nil); bDatabaseFailed := false; end else bDatabaseFailed := true; end else bDatabaseFailed := true; end;
I think it's all pretty self explanatory, fQuery is the query you want to execute.
Regards Keith
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