Using Regular Expressions for Searching Accommodation Providers in Azure Search

B.

The SearchParameters.QueryType Property gets or sets a value that specifies the syntax of the search query.

The default is 'simple'

Use 'full' if your query uses the Lucene query syntax.

You can write queries against Azure Search based on the rich Lucene Query Parser syntax for specialized query forms: wildcard, fuzzy search, proximity search, regular expressions are a few examples.

https://docs.microsoft.com/en-us/dotnet/api/microsoft.azure.search.models.searchparameters https://docs.microsoft.com/en-us/dotnet/api/microsoft.azure.search.models.searchparameters.querytype

To enable regular expression-based searching on an Azure Search index from a .NET Core MVC application, you should configure the QueryType property of the SearchParameters class.

Answer B is the correct one.

Here's a brief explanation of why:

Azure Search is a cloud-based search service that allows developers to add search capabilities to their applications. It provides a rich set of search features and supports various types of searches such as simple queries, full-text searches, and more advanced searches using filters, facets, and regular expressions.

To interact with Azure Search, you can use one of the Azure Search client libraries, such as the .NET SDK for Azure Search. This SDK provides a SearchIndexClient class that allows you to send search requests to an Azure Search index and retrieve the search results.

When sending a search request, you can specify various search parameters, such as the search mode, query type, filters, facets, and more. These search parameters are encapsulated in a SearchParameters object that you pass to the SearchIndexClient.SearchAsync method.

To enable regular expression-based searching on an Azure Search index, you should set the QueryType property of the SearchParameters object to QueryType.Full:

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var searchParams = new SearchParameters {     QueryType = QueryType.Full }; 

By setting the QueryType property to QueryType.Full, you indicate that the search query should be treated as a full Lucene query, which allows you to use regular expressions in your search queries.

For example, suppose you have an Azure Search index that contains a field named "description" that contains a text description of the holiday accommodation providers. To search for all documents that contain the word "beach" followed by any two characters, you can use the following regular expression:

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description:/beach../ 

You can then use this regular expression in your search query:

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var searchText = "/beach../"; var searchResults = await searchClient.Documents.SearchAsync(searchText, searchParams); 

This will return all documents that contain the word "beach" followed by any two characters in the "description" field of the index.

In summary, to enable regular expression-based searching on an Azure Search index from a .NET Core MVC application, you should configure the QueryType property of the SearchParameters class to QueryType.Full.