public PngViewer(string filePath, IViewerCache cache, LoadOptions loadOptions, int pageNumber = -1, int newAngle = 0)
{
this.cache = cache;
this.filePath = filePath;
this.viewer = new GroupDocs.Viewer.Viewer(filePath, loadOptions);
this.pngViewOptions = this.CreatePngViewOptions(pageNumber, newAngle);
this.viewInfoOptions = ViewInfoOptions.FromPngViewOptions(this.pngViewOptions);
}
/// <summary>
/// Gets the entry associated with this key if present or acquires and sets the entry if not present.
/// </summary>
/// <typeparam name="TEntry">Type of entry.</typeparam>
/// <param name="cache">The cache.</param>
/// <param name="key">A key identifying the requested entry.</param>
/// <param name="acquire">The method which returns entry.</param>
/// <returns>The entry associated with this key if present or acquires and sets the entry if not present.</returns>
public static TEntry GetValue <TEntry>(this IViewerCache cache, string key, Func <TEntry> acquire)
{
TEntry entry;
if (!cache.TryGetValue(key, out entry))
{
entry = acquire();
cache.Set(key, entry);
}
return(entry);
}