I am trying to test a method that retrieves some info from a SQL Server 2012 Express instance and "adds" it into a list. The problem is that when I try to run the test I get the error:
"System.InvalidCastException"
Here is the code:
List<Reference> lst = new List<Reference>();
//DB Connections is a class instance that takes care of the
//connection with the db.
DBConnections db = new DBConnections(DbConfig.conStr);
db.UpdateCmd("SELECT * FROM freelancers_references");
SqlDataReader dr = db.ExecuteReader();
if (dr.HasRows) {
lst = dr.Cast<IDataRecord>().Select(r =>
new Reference {
Id = (int)dr["id"],
OwnerId = (int)dr["owner_id"],
Name = (string)dr["name"],
Active = (bool)dr["active"]
}).ToList<Reference>();
}
dr.Close();
return lst;
EDIT: @Dan provided a working answer. Though using a Convert.ToInt/ToString() etc method did the trick as well.
Check if columns allows null. If so, make the type nullable Ie
OwnerId = (int?)dr["owner_id"],
DBConnections db = new DBConnections(DbConfig.conStr);
db.UpdateCmd("SELECT * FROM freelancers_references");
SqlDataReader dr = db.ExecuteReader();
if (dr.HasRows) {
lst = dr.OfType<IDataRecord>().Select(r =>
new Reference {
Id = (int)dr["id"],
OwnerId = (int)dr["owner_id"],
Name = (string)dr["name"],
Active = (bool)dr["active"]
}).ToList();
}
dr.Close();
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