Windows Search 4查询-Delphi示例 [英] Windows Search 4 Query - Delphi Example

问题描述

以下网页描述了以编程方式查询Windows Search:

The following web page describes querying Windows Search programmatically:

http://msdn.microsoft.com/en-us/library/aa965362.aspx

有人使用Delphi/Pascal编写示例吗?

Does anyone have examples using Delphi/Pascal?

我想到的例子很简单:

1. 搜索某些文件类型.
2. 搜索文件中的特定文本.
3. 将上述搜索限制在特定路径上.

推荐答案

这是我前一段时间做过的-请注意，它可能已经过时了:

Here's one I did a while ago - be aware that it may be out of date: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;

我认为这很容易解释，fQuery是您要执行的查询.

I think it's all pretty self explanatory, fQuery is the query you want to execute.

问候基思

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