Add Unique records in StudentCollection

Ramco Ramco

I have below code & i want only distinct records in StudentCollection.

List objResult = bALSessionDeliveryParticipant.GetSessionDeliveryParticipantList(Convert.ToDateTime("2020-01-01"), Utility.CurrentDateTime(), MentorCollection, GroupCollection);
                if (objResult != null)
                {
                    foreach (var colum in objResult)
                    {
                        StudentCollection.Add(colum.StudentID.ToString());
                    }
                }

Thanks

2 Replies

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Amit Mohanty3y ago

Accepted answer

try this:

List objResult = bALSessionDeliveryParticipant.GetSessionDeliveryParticipantList(Convert.ToDateTime("2020-01-01"), Utility.CurrentDateTime(), MentorCollection, GroupCollection);
if (objResult != null)
{
    StudentCollection = objResult.Select(colum => colum.StudentID.ToString()).Distinct().ToList();
}

Aravind Govindaraj3y ago
Hi Ramco,

you could get the desired result in a couple of approaches

1. you can get a distinct result from the backend in the get method (bALSessionDeliveryParticipant.GetSessionDeliveryParticipantList)

2. Before adding to StudentCollection, please check if the student id already exists in the collection.

if ! (StudentCollection.Any(x=>x.StudentId == column.StudentID)

{

StudentCollection.Add(colum.StudentID.ToString());

}