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Failed to compare two elements in the array

I have a List<T> where T is a class that exposes a "Username" property. Username is of a custom type that encapsulates a string. I implemented the IComparable<T> interface on this custom type that simply returns

this.encapsulatedString.CompareTo(other.encapsulatedString) 

I defined an ICollectionView of the List thus:

AllUsers=CollectionViewSource.GetDefaultView(myList); 

I added a Sortdescription:

AllUsers.SortDescriptions.Add(new SortDescription("Username",ListSortDirection.Ascending)); 

On this line the code throws the exception stated in the title. I can sort the list by other means without problem. Where is the exception coming from?

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Dabblernl Avatar asked Nov 01 '09 22:11

Dabblernl


1 Answers

The custom type has to implement IComparable as well as IComparable<T>. It seems the SortDescription uses the old fashioned non-generic version of CompareTo.

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Dabblernl Avatar answered Sep 22 '22 16:09

Dabblernl