CODEWITHSUNDEEP
c#.netclassgenericstypeof
SaschaR
SaschaR

Reputation: 33

Check if object is of generic type with multiple type arguments

Assuming you have a Grid with an ItemsSource-Property (DataGrid.ItemsSource). This property is been set during runtime. A possible object could be the following:

public partial class InstantFeedbackCollectionViewModel<TEntity, TPrimaryKey, TUnitOfWork> 
   : InstantFeedbackCollectionViewModelBase<TEntity, TEntity, TPrimaryKey, TUnitOfWork>

Later during runtime I want to catch an Event and want to check whether the ItemsSource of the grid is of the type above.

Usually I would do something like that:

if (typeof(datagrid.ItemsSource) is InstantFeedbackCollectionViewModel) then ...

But how can I do this with this generic class?

UPDATE:

In the second step I would like to execute a method in the InstantFeedbackCollectionViewModel. Something like that:

if (datagrid.ItemsSource.GetType().GetGenericTypeDefinition() == typeof(InstantFeedbackCollectionViewModel<,,>) {
var instFeedbackCollectionViewModel = grid.ItemsSource;
instFeedbackCollectionViewModel.ExecuteMyMethod();
}

Does one know how to do this?

Upvotes: 3

Views: 1239

Answers (1)

Guillaume
Guillaume

Reputation: 13138

If you want to know whether the type is a generic InstantFeedbackCollectionViewModel you can use this code :

bool isInstantFeedbackCollectionViewModel = 
      datagrid.ItemsSource.GetType().GetGenericTypeDefinition() ==
      typeof(InstantFeedbackCollectionViewModel<,,>);

If you want to know whether the type inherits from a generic InstantFeedbackCollectionViewModel then see Check if a class is derived from a generic class.

Upvotes: 3

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