convert from SqlDataReader to JSON

Question

public string toJSON(SqlDataReader o)
{
    StringBuilder s = new StringBuilder();
    s.Append(\"[\");
    if (o.HasRows)
        while (o.Read())
            s.App         


        

Answer 1

This is to enhance Chandu's Linq answer that uses query syntax (from ... select ...). If you prefer Method Syntax, here is your answer.

drdr = cmd.ExecuteReader();
Record[] recs = drdr.Cast().Select( data=>new Record{
            GraphID=(drdr.IsDBNull(0) ? "" : (string)data["LabelX"])
        , XAxis=(drdr.IsDBNull(1) ? "1999-09-09 00:00:00" : Convert.ToDateTime(data["XDate"]).ToString("yyyy-MM-dd HH:mm:ss"))
        , YVal=(drdr.IsDBNull(2) ? 0 : int.Parse(data["YFreq"].ToString()))
        }).ToArray();

MemoryStream mem = new MemoryStream();
DataContractJsonSerializer szr = new DataContractJsonSerializer(typeof(Record[]));
szr.WriteObject(mem, recs);
String jsonData = Encoding.UTF8.GetString(mem.ToArray(), 0, (int)mem.Length); 

Hope it helps somebody.