LabVIEW 2018 DataFinder Toolkit Help

Edition Date: June 2018

Part Number: 372745L-01

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DataFinder and DataFinder Server

The DataFinder searches for data files in the search areas you specify. Search areas are file system folders that are on your local computer or on the network. Click the Search Areas tab in the DataFinder configuration dialog box to specify the search areas. To open the DataFinder configuration dialog box, right-click the DataFinder symbol on the task bar and select Configure.

Note  In Windows 7 you must select Show hidden icons from the taskbar in order to display the DataFinder symbol.

For the DataFinder to search for data in the search areas, the indexer must first index the data. DataPlugins enable the DataFinder to index many different file formats and to browse in these files. Click the DataPlugins tab in the DataFinder configuration dialog box to specify which filename extensions the DataFinder recognizes when searching for data.

You can search for data on the desktop DataFinder "My DataFinder" and on a DataFinder server. Use "My DataFinder" to run a search with the desktop DataFinder on your computer or on the network. The DataFinder index is on your computer. You cannot delete or export the MyDataFinder DataFinder and you cannot create an additional desktop DataFinder. You can specify which search areas this DataFinder uses for a search.

In addition to your desktop DataFinder, you also can use any number of DataFinder servers that are usually on other computers on your network. A DataFinder server is a DataFinder from the DataFinder Server Edition. The DataFinder Server Edition enables you to configure a DataFinder and to make the DataFinder available to multiple users on the network. In the DataFinder Server Edition configuration you can assign rights to clients.

You can also use federations to combine several DataFinder servers. This means that you can receive data on the central federation server from many DataFinder servers from different locations.


Search Text or Execute Query

Search for text if you only have parts of the information you are searching for, or if you do not know whether the information you are searching for is in a file, a group, or a channel property.

Execute a query if you want to search in specific file, group, or channel properties. You can specify, for example, that you want to search for channels or files named Time. You can run more complex search queries if you combine several query conditions. If all search areas are completely indexed, executing a query returns reproducible results. Refer to Notes  on Searching for Data with the DataFinder Toolkit for further information.

The entries involved in searching for text and executing a query are not case-sensitive.

Indexing the Search Areas

For the DataFinder to run a search for data from the search area, the indexer must index the data first. Click the Indexer tab in the DataFinder configuration dialog box to specify when and how often the DataFinder indexes the search areas. The DataFinder does not start indexing until the time you specified in the dialog box elapses without a mouse movement or a key action.

The indexing process or the indexing update works under the following conditions:

  • Indexing and the indexing update run automatically at the times you set on the Indexer tab in the Configure My DataFinder dialog box.
  • Indexing or the indexing update run automatically when contents of the local search areas change or when you delete a file or create a new file.

  • Open the Configure My DataFinder dialog box, click the Indexer tab, and click the Start Now button, to start indexing or reindexing.

Note  You can use the methods Update Search Area, Index File, Index Folder, and Get Statistics in DataFinder Version 2.2 and later versions.

Network Drives, CD ROM, and Deleted Folders

If the search areas refer to transient folders, for example, network drives, CD or DVD drives, or memory sticks, the contents of these folders remain in the index although the folders are no longer available. In this case you can search for files, groups, and channels of these folders but you cannot navigate in the folders or load search results from the folders. The file browser identifies folders that are no longer available in a certain search area with a red exclamation mark.

If you delete a search area from the DataFinder, the DataFinder deletes the associated entry from the index. If you delete files or folders from a search area, the DataFinder updates the index.
If you delete a folder from the search area while the DataFinder is not active, the DataFinder treats the folder like a transient folder. If you restore a deleted folder of a search area or if the transient folder is available again, the DataFinder updates the search area and you can load files from the folder.

Note  If you use a DataFinder server from the DataFinder Server Edition as a DataFinder server, you need at least Version 2.0 of the DataFinder Server Edition to execute a search. To configure a local DataFinder server with the property nodes and invoke nodes, you need at least Version 2.1 of the DataFinder Server Edition.
Note  In order to be able to search for data in or to load data from a spreadsheet, Microsoft.NET Framework 3.0 or later versions must be installed on your computer. DIAdem 2011 installs Microsoft.NET Framework 3.0 by default. The framework is also installed on the operating systems Windows Server 2008, Windows 7, and Windows Vista. Search for the text "Microsoft .NET Framework Redistributable Package" in your Internet browser to load the framework version necessary for your operating system.
Note  Use a DataPlugin built with the LabVIEW DataPlugin SDK only with the same LabVIEW version with which you created this DataPlugin.


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