How to cast IQueryable

Question

I have a collection (IQueryable<object>/IEnumerable<object>) and a given Type that I get by reflection at runtime. How can I cast the IQueryable<object> to the specific Type when:

The Type is a class e.g. Person (and I want to make a cast of the IQueryable<object> to IQueryable<Person>)
The Type is a generic collection e.g. IQueryable<Person>

Note that Type is a variable that I get through aVariable.GetType(). I do not know the type beforehand, therefore I cannot use Cast<type> nor (type).

@MohammadHamoud the Type is a variable that I get through object.GetType() — Midas, Mar 14 '18 at 06:11
@Midas Something seems weird about this. Can you add more details about your flow? — ProgrammingLlama, Mar 14 '18 at 06:11
@MohammadHamoud If I knew the type beforehand yes. In this case I get the type at runtime through GetType(). — Midas, Mar 14 '18 at 06:15
@Midas But how do you hope to use the result if you don't know the type at compile time, or through using generics? — ProgrammingLlama, Mar 14 '18 at 06:16
@john I want to use it in dynamic linq. The reason I want to convert it is out of the scope of the question (it would complicate things and I want to keep it clean). — Midas, Mar 14 '18 at 06:18
Midas [XY Problem](https://meta.stackexchange.com/questions/66377/what-is-the-xy-problem) — ProgrammingLlama, Mar 14 '18 at 06:19
@Midas please mark my answer as accepted in order for others to know when passing this question by — Mohammad Ali, Mar 14 '18 at 06:48
@YeldarKurmangaliyev: I intend to use it in a dynamic linq query. When it was left unconverted, the query gave error on fields that were actually there. When it gets converted the query executes without throwing an exception. — Midas, Mar 14 '18 at 11:41

score 1 · Accepted Answer · answered Mar 14 '18 at 06:45

1

If targeted type is known, go with this

yourIEnumerable.Select(x => (YourType) x);

But as you noted, you don't know the type of the targeted type and you are getting it using object.GetType() so I would recommend to follow this link

answered Mar 14 '18 at 06:45

Mohammad Ali

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