public static void AddContentType(this SPList list, SPContentType contentType, bool throwOnNotAllowed = false)
{
// Make sure the list accepts content types.
list.ContentTypesEnabled = true;
try
{
// Add the content type to the list.
if (!list.IsContentTypeAllowed(contentType))
{
throw new SPException(string.Format("The \"{0}\" content type is not allowed on the \"{1}\" list.",
contentType.Name, list.Title));
}
if (list.ContainsContentTypeWithId(contentType.Id))
{
throw new SPException(string.Format("The content type \"{0}\" is already in use on the \"{1}\" list",
contentType.Name, list.Title));
}
}
catch (SPException)
{
if (throwOnNotAllowed)
{
throw;
}
return;
}
list.ContentTypes.Add(contentType);
}
private void ContentTypesAction(SPList list, IEnumerable <SPContentType> contentTypes)
{
foreach (SPContentType contentType in contentTypes)
{
if (!list.ContainsContentTypeWithId(contentType.Id) && list.IsContentTypeAllowed(contentType))
{
list.AddContentType(contentType);
}
}
}
