GroupDocs.Search for .NET 21.2 Release Notes

Major Features

There are the following improvementes in this release:

• Implement ability to perform boolean search with stop words
• Implement ability to get status of indexed file
• Implement ability to delete files indexed from stream

Full List of Issues Covering all Changes in this Release

Public API and Backward Incompatible Changes

Implement ability to perform boolean search with stop words

This improvement allows to perform boolean search on queries containing stop words. Now stop words in a boolean search query do not lead to an empty result, but are simply ignored.

Public API changes

None.

Use cases

The following example demonstrates a logical search using a stop word in a query.

C#

string indexFolder = @"c:\MyIndex";
string documentFolder = @"c:\MyDocuments";

// Creating an index
Index index = new Index(indexFolder);

// Indexing documents in a document folder
index.Add(documentFolder);

// Searching in the index. The word 'of' is the stop word by default.
SearchResult result = index.Search("Theory AND of AND relativity");

Implement ability to get status of indexed file

This improvement adds new properties to the DocumentInfo class: DocumentSourceKind and IndexedWithError, which allow to get the type of the document indexing source and the indexing error indicator.

Public API changes

Property DocumentSourceKind DocumentSourceKind has been added to GroupDocs.Search.Results.DocumentInfo class.
Property bool IndexedWithError has been added to GroupDocs.Search.Results.DocumentInfo class.

Use cases

The following example demonstrates how to get the type of source of an indexed document and the indexing error indicator.

C#

string indexFolder = @"c:\MyIndex";
string documentFolder = @"c:\MyDocuments";

// Creating an index
Index index = new Index(indexFolder);

// Indexing documents in a document folder
index.Add(documentFolder);

// Getting information about indexed documents
DocumentInfo[] infos = index.GetIndexedDocuments();
for (int i = 0; i < infos.Length; i++)
{
    DocumentInfo info = infos[i];
    Console.WriteLine("Document source kind: " + info.DocumentSourceKind);
    Console.WriteLine("Indexed with error: " + info.IndexedWithError);
}

Implement ability to delete files indexed from stream

This improvement allows to delete documents from an index that have been indexed from a stream or from a structure.

Public API changes

Method DeleteResult Delete(UpdateOptions, string[]) has been added to GroupDocs.Search.Index class.

Use cases

The following example demonstrates how to delete documents from an index by key.

C#

string indexFolder = @"c:\MyIndex";
string documentPath = @"c:\MyDocuments\Document.pdf";
string documentKey = "My Document.pdf";

// Creating an index
Index index = new Index(indexFolder);

// Indexing a document from stream
using (Stream stream = File.OpenRead(documentPath))
{
    Document document = Document.CreateFromStream(documentKey, DateTime.Now, ".pdf", stream);
    index.Add(new Document[] { document }, new IndexingOptions());
}

// Deleting the document from the index by key
index.Delete(new UpdateOptions(), new string[] { documentKey });