/// <summary>
/// Gets attribute <paramref name="propertyName"/> as string (or returns
/// null if does not exists).
/// </summary>
/// <param name="propertyName">Name of the single property.</param>
/// <returns>Property value or null.</returns>
public string GetAsStringOrNull(string propertyName)
{
TikPropertyItem item = GetOrCreateItem(propertyName);
if (item.HasValue)
{
return(item.GetAsString());
}
else
{
return(null);
}
}
/// <summary>
/// Gets attribute <paramref name="propertyName"/> as string (value must be set!).
/// </summary>
/// <param name="propertyName">Name of the single property.</param>
/// <returns>Property value or exception.</returns>
/// <exception cref="InvalidOperationException">If property is not defined.</exception>
public string GetAsString(string propertyName)
{
TikPropertyItem item = GetOrCreateItem(propertyName);
return(item.GetAsString());
}