/// <summary>
/// Gets the value of the property with the given <paramref name="propertyName"/>, or <see cref="string.Empty"/> if a property with that name does not exist on this object or is <c>null</c>.
/// </summary>
/// <remarks>
/// To avoid conflicts with template syntax, avoid using the following symbols in the property name
/// <list type="bullet">
/// <item><description>:</description></item>
/// <item><description>%</description></item>
/// <item><description>$</description></item>
/// <item><description>#</description></item>
/// <item><description>></description></item>
/// <item><description><</description></item>
/// <item><description>"</description></item>
/// <item><description>'</description></item>
/// </list>
/// </remarks>
/// <param name="propertyName">Name of the property.</param>
/// <param name="format">
/// A numeric or DateTime format string, or one of the string formatting options accepted by <see cref="TemplateEngine.FormatString"/>,
/// or <c>null</c> or <see cref="string.Empty"/> to apply the default format.
/// </param>
/// <returns>The string representation of the value of this instance as specified by <paramref name="format"/>.</returns>
public override string GetValue(string propertyName, string format)
{
if (propertyName == null)
{
throw new ArgumentNullException("propertyName");
}
switch (propertyName.ToUpperInvariant())
{
case "MULTIPLE CATEGORIES":
case "MULTIPLECATEGORIES":
IEnumerable <Category> categories = CategoryCollection.Load(this.PortalId);
var moduleCategoryIds = ModuleSettings.GetCategoriesFor(new FakeModuleControlBase(Utility.DesktopModuleName, this.ModuleContext.Configuration));
if (moduleCategoryIds.Any())
{
var categoryIdsWithAncestor = Utility.AddAncestorIds(moduleCategoryIds.ToArray(), categories.ToArray(), true);
categories = categories.Where(category => categoryIdsWithAncestor.Contains(category.Id));
}
return((categories.Count() > 1).ToString(CultureInfo.InvariantCulture));
}
return(base.GetValue(propertyName, format));
}