Fastest way to map result of SqlDataReader to object

Question

I\'m comparing materialize time between Dapper and ADO.NET and Dapper. Ultimately, Dapper tend to faster than ADO.NET, though the first time a given fetch query was executed

Answer 1

There is a SqlDataReader Mapper library in NuGet which helps you to map SqlDataReader to an object. Here is how it can be used (from GitHub documentation):

var mappedObject = new SqlDataReaderMapper(reader)
    .Build();

Or, if you want a more advanced mapping:

var mappedObject = new SqlDataReaderMapper(reader)
     .NameTransformers("_", "")
     .ForMember("CurrencyId")
     .ForMember("CurrencyCode", "Code")
     .ForMember("CreatedByUser", "User").Trim()
     .ForMemberManual("CountryCode", val => val.ToString().Substring(0, 10))
     .ForMemberManual("ZipCode", val => val.ToString().Substring(0, 5), "ZIP")
     .Build();

Advanced mapping allows you to use name transformers, change types, map fields manually or even apply functions to the object's data so that you can easily map objects even if they differ with a reader.