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

With Cinchoo ETL - an open source library, you can export SqlDataReader to JSON easily with few lines of code

string connectionstring = @"Data Source=(localdb)\MSSQLLocalDB;Initial Catalog=Northwind;Integrated Security=True";
StringBuilder sb = new StringBuilder();

using (var conn = new SqlConnection(connectionstring))
{
    conn.Open();
    var comm = new SqlCommand("SELECT top 2 * FROM Customers", conn);

    using (var parser = new ChoJSONWriter(sb))
        parser.Write(comm.ExecuteReader());
}

Console.WriteLine(sb.ToString());

Output:

[
 {
  "CustomerID": "ALFKI",
  "CompanyName": "Alfreds Futterkiste",
  "ContactName": "Maria Anders",
  "ContactTitle": "Sales Representative",
  "Address": "Obere Str. 57",
  "City": "Berlin",
  "Region": {},
  "PostalCode": "12209",
  "Country": "Germany",
  "Phone": "030-0074321",
  "Fax": "030-0076545"
 },
 {
  "CustomerID": "ANATR",
  "CompanyName": "Ana Trujillo Emparedados y helados",
  "ContactName": "Ana Trujillo",
  "ContactTitle": "Owner",
  "Address": "Avda. de la Constitución 2222",
  "City": "México D.F.",
  "Region": {},
  "PostalCode": "05021",
  "Country": "Mexico",
  "Phone": "(5) 555-4729",
  "Fax": "(5) 555-3745"
 }
]