In our application different type (images, word documents, pdfs, videos) of files are stored in ImageVault. I was able to index these ImageVault files and even query them using the following query:

client.Search().Select(x => new SearchHit{Title = x.Name, Url = x.LinkURL}).GetResult()

Further to this, I would like to add filtering option to the above query which is where I'm stuck now. Following is the representation of ImageVault class structure:

public class IVFileData : IFileHandler {

public IVCategoryCollection Categories { get; set; }

public DateTime Changed { get; }

public string ColorDepth { get; }

public string ColorSpace { get; }

public IVConversionFormatCollection ConversionFormats { get; }

public DateTime Created { get; }

public User CreatedBy { get; }

public string Extension { get; }

public string FileName { get; }

public long FileSize { get; }

public int Height { get; }

public int Id { get; }

public bool IsArchived { get; }

public bool IsImage { get; }

public long Length { get; }

public string LinkURL { get; }

public IVMetaDataCollection MetaData { get; }

public string Name { get; }

public int Resolution { get; }

public string Title { get; }

public int Width { get; }

public void Delete();

public void MoveTo(IDirectoryHandler dir);

public Stream OpenRead();

public Stream OpenWrite();

public static IVFileData Parse(object property);

public static IVFileData Parse(object property, IVAccessLevel accessLevel);

public bool QueryDistinctAccess(IVAccessLevel access);

public void Rename(string newName);

}

public class IVCategoryCollection : CollectionBase, ICategoryList, ICollection, IEnumerable {

public IVCategoryCollection();

public IVCategory this[int i] { get; set; }

public IVCategory this[string name] { get; set; }

public int Add(IVCategory category);

public int GetIndex(IVCategory category);

public void Insert(int index, IVCategory category);

protected override void OnInsert(int index, object value);

protected override void OnRemove(int index, object value);

protected override void OnSet(int index, object oldValue, object newValue);

protected override void OnValidate(object value);

public void Remove(IVCategory category);

}

public class IVCategory {

public IVCategory(int id);

public int Id { get; }

public string Name { get; }

public string OriginalName { get; }

}

Each file in ImageVault is accessed via the IVFileData object. As represented, the "Categories" property in IVFIleData class is a collection of type IVCategoryCollection. I now want to filter the IVFileData objects based on a particular category. Say I have 2 IVFileData files, one with categories - RegionEurope and LanguageEnglish and another with only LanguageGerman category. I want to filter the objects and get only those with LanguageGerman category. I'm not able to write the ".Match" or ".MatchContained" filters on "client.Search().Filter(x => x.Categories.", as I dont get these options on the intellisense.

Hence, I'm not able to do a query like "client.Search().Filter(x => x.Categories.MatchContained(y = y.Name, "LanguageGerman"))". Kindly let me know on how to filter IVFileData objects based on desired categories. Thanks.