Question

We have a stored procedure that returns a single column of strings. We would like to use SqlHelper.ExecuteReader( ConnectionString,…) to return a list< string > but aren’t sure of the syntax.

I should have been more explicit. I didn’t want to have to loop through the reader and build the list myself. I was hoping for a more concise, ‘one liner’ or maybe some kind of casting that I was unaware of.

Answer 1

You can use this extension method:

public static IEnumerable<IDataRecord> AsEnumerable(this IDataReader reader)
{
    while (reader.Read())
    {
        yield return reader;
    }
}

...

using (var reader = SqlHelper.ExecuteReader(connectionString, query))
{
    var list = reader.AsEnumerable().Select(r => r.GetString(0)).ToList();
}