how to pass classtype dymanically to generic class-CodePudding

i have this kind of requirement as there are around 100 models

I have repository pattern implemented for DB operations

public class interface IRepository<TEntity> : IRepository<TEntity>where TEntity : class

it has method Task Add(TEntity entity);

in normal circumstances ,i would just do this if i want to add UserClass model to DB

public class UserClass {string Name}
    
UserClass userClassObj = new UserClass {Name = "John"}

await Repository <UserClass>.Add(userClassObj);

However, my requirement is to pass pass class type dynamically based on condition as i have around 100 models.

if (condition == "1")
   classtype = USerClass
else if (condition == "2")
   classtype = DepartmentClass
else if (condition == "3")
   classtype = CategoryClass

and then pass classtype to Repository await Repository <classtype>.Add(object of (classtype ));

is this doable? any working example will be highly apricated. could not found straight forward implementation so far.

CodePudding user response：

You might need to extend your class definition like this,

public class interface IRepository<TEntity> : IRepository<TEntity>where TEntity : class, new()

new() enables creating new object based on passed type.

then you can call it like this,

if (condition == "1")
   await Repository<USerClass>.Add(object);
else if (condition == "2")
   await Repository<DepartmentClass>.Add(object);

CodePudding user response：

If you don't want to use Reflection may add an extra add helper method to (maybe also to your IRepositoryType not sure if this<T> work)

 public static async Task Add<T>(T objectToAdd) where T : TEntity
 {
    await Repository<T>.Add(objectToAdd)
 }

if you have the type argument and a parameter that needs the type you dont have to specify it any more and it will chosoe usually the right type argument with the given parameter type. E.g.

var userObject = new UserObject();
Repository.Add(userObject);

will automaticly detect that it is the userbject the type to be add

another possibility would be to use a Dictionary<Type,yourDBsetType>() and match it by the type key