DocumentCache Class

public class DocumentCache : FileCache

//This DocumentCache instance is already filled with necessary information like cache location, license key etc.
//So it will use the same settings as the DocumentViewer.
var documentCache = DocumentUltimateWebConfiguration.Current.GetCache();

/*
Make sure you set your license key in external application before calling PreCacheDocument method.
Or you can create a DocumentUltimateConfiguration instance with your license key and pass that
instance to the DocumentCache constructor.
*/
DocumentUltimateConfiguration.Current.LicenseKey = "QQJDJLJP34...";

/*
Make sure you pass parameters (location, encryptionEnabled, keepVariations) to DocumentCache constructor
which are the same values that are set in DocumentUltimateWebConfiguration.Current in your web application 
that hosts the DocumentViewer. Usually you would only need to pass location parameter unless you 
change default values of other parameters.

Note that DocumentUltimateWebConfiguration.Current.CacheLocation accepts also virtual paths (e.g. "~/App_Data/DocumentCache")
but in a non-web application e.g. in a Console application, when passing location parameter to DocumentCache constructor, 
use the physical path (resolved path) because virtual paths can not be resolved in a non-web application.
*/
var documentCache = new DocumentCache(@"C:\SomeFolder\DocumentCache");

/*
Pass the document (FileProvider) to PreCacheDocument method which is the same that will passed to DocumentViewer.
CacheSourceKey is generated according to combination of file extension, file modified date and file size info.

Note that DocumentViewer.Document accepts also virtual paths (e.g. "~/SomeFolder/Document.docx")
but in a non-web application e.g. in a Console application, when passing document parameter to PreCacheDocument method,
use the physical path (resolved path) because virtual paths can not be resolved in a non-web application.
*/
documentCache.PreCacheDocument(@"c:\SomeFolder\Document.docx");


//Pass the same document options that will be set in DocumentViewer.DocumentOptions.
//This is because some options can change CachePdfKey and/or CacheXpzKey.
documentCache.PreCacheDocument(
    @"c:\SomeFolder\Document.docx",
    new DocumentOptions
    {
        Watermarks = new Collection<Watermark>
        {
            new TextWatermark
            {
                Text = "Sample watermark"
            }
        }
    }
);