@"(\s+(asc|ascending|desc|descending))?\s*$", RegexOptions.IgnoreCase); // order operators
internal static IQueryable AsQueryable(object o)
{
IQueryable oQueryable = o as IQueryable;
if (oQueryable != null)
{
return(oQueryable);
}
// Wrap strings in IEnumerable<string> instead of treating as IEnumerable<char>.
string oString = o as string;
if (oString != null)
{
return(Queryable.AsQueryable(new string[] { oString }));
}
IEnumerable oEnumerable = o as IEnumerable;
if (oEnumerable != null)
{
// IEnumerable<T> can be directly converted to an IQueryable<T>.
Type genericType = FindGenericEnumerableType(o.GetType());
if (genericType != null)
{
// The non-generic Queryable.AsQueryable gets called for array types, executing
// the FindGenericType logic again. Might want to investigate way to avoid this.
return(Queryable.AsQueryable(oEnumerable));
}
// Wrap non-generic IEnumerables in IEnumerable<object>.
List <object> genericList = new List <object>();
foreach (object item in oEnumerable)
{
genericList.Add(item);
}
return(Queryable.AsQueryable(genericList));
}
// Wrap non-IEnumerable types in IEnumerable<T>.
Type listType = typeof(List <>).MakeGenericType(o.GetType());
IList list = (IList)DataSourceHelper.CreateObjectInstance(listType);
list.Add(o);
return(Queryable.AsQueryable(list));
}
protected virtual object CreateContext(Type contextType)
{
return(DataSourceHelper.CreateObjectInstance(contextType));
}
