我需要编写一些通用的搜索方法,就像这样:
public List<T> Search<T>(SearchParamsBase searchParams)
{
using (var context = new TestEntities())
{
var dataType = TypeMap.Get(typeof (T));
var dataSet = context.Set(dataType);
var searchQuery = CreateQuery((IEnumerable<object>) dataSet), searchParams)
return searchQuery.ToList()
}
}
我有一个函数CreateQuery()
,它应该过滤IEnumerable
对象。这个函数对于所有的类都是不同的。例如:
CreateQuery(IEnumerable<object> collection, SearchParamsBase searchParams)
{
var search = (SomeSearchImplementation)searchParams;
// filter
collection = collection.Where(x => x.Name == search.Name);
// select page
collection = collection.Skip(search.Page * search.CountPerPage);
collection = collection.Take(search.CountPerPage);
// order by and so on
// ...
return collection;
}
我该如何正确实现这个想法?