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

Perhaps the approach I will present isn't the most efficient but gets the job done with very little coding effort. The main benefit I see here is that you don't have to deal with data structure other than building a compatible (mapable) object.

If you convert the SqlDataReader to DataTable then serialize it using JsonConvert.SerializeObject you can then deserialize it to a known object type using JsonConvert.DeserializeObject

Here is an example of implementation:

        SqlDataReader reader = null;
        SqlConnection myConnection = new SqlConnection();
        myConnection.ConnectionString = ConfigurationManager.ConnectionStrings["DatabaseConnection"].ConnectionString;
        SqlCommand sqlCmd = new SqlCommand();
        sqlCmd.CommandType = CommandType.Text;
        sqlCmd.CommandText = "SELECT * FROM MyTable";
        sqlCmd.Connection = myConnection;
        myConnection.Open();
        reader = sqlCmd.ExecuteReader();

        var dataTable = new DataTable();
        dataTable.Load(reader);

        List myObjects = new List();

        if (dataTable.Rows.Count > 0)
        {
            var serializedMyObjects = JsonConvert.SerializeObject(dataTable);
            // Here you get the object
            myObjects = (List)JsonConvert.DeserializeObject(serializedMyObjects, typeof(List));
        }

        myConnection.Close();