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

Further to Jonathan's Answer, I had a similar requirement in ASP.NET Core to convert the result of an SQLDataReader to a JSON string or a Result Object, so I created an extension method for it as :

 public static class MyExtensions
    {
        public async static Task toJSON(this SqlDataReader reader)
        {            
            var results = await reader.GetSerialized();
            return JsonConvert.SerializeObject(results, Formatting.Indented);
        }
        public async static Task>> GetSerialized(this SqlDataReader reader)
        {
            var results = new List>();
            var cols = new List();
            for (var i = 0; i < reader.FieldCount; i++)
                cols.Add(reader.GetName(i));

            while (await reader.ReadAsync())
                results.Add(SerializeRow(cols, reader));

            return results;
        }
        private static Dictionary SerializeRow(IEnumerable cols,
                                                        SqlDataReader reader)
        {
            var result = new Dictionary();
            foreach (var col in cols)
                result.Add(col, reader[col]);
            return result;
        }
    }

& used it as per my requirement as :

var result = await reader.GetSerialized(); //to get the result object

or

string strResult = await reader.toJSON(); //to get the result string

I created an async method because I had some other things to be done till the reading was finished from database.