如何以JSON格式从ASP.NET返回名称和电子邮件

Question

i need to return the names and emails which are selected from a MS SQL 2008 table in a JSON format. here is what I've got so far :

public class RaumHelper
{
    internal static string[] Raum()
    {
        List<string> raumObject = new List<string>();

        using (SqlConnection con = new SqlConnection(@"Data Source=Localhost\SQLEXPRESS;Initial Catalog=BOOK-IT-V2;Integrated Security=true;"))
        using (SqlCommand cmd = new SqlCommand(@"SELECT NAME, EMAIL FROM RAUM", con))
        {
            con.Open();
            using (SqlDataReader rdr = cmd.ExecuteReader())
            {
                while (rdr.Read())
                {
                    if (rdr["NAME"] != DBNull.Value && rdr["EMAIL"] != DBNull.Value)
                    {
                        raumObject.Add(rdr["NAME"].ToString());
                        raumObject.Add(rdr["EMAIL"].ToString());
                    }
                }
            }
        }
        return raumObject.ToArray();
    }
}

i want to return it in json format not Array.

it should look like this or similar:

 {"d":[{
  "Name": "Hans",
  "Email": "bla@blub.de"
  }]}

Answer 1

您的JavaScriptSerializer类将列表对象转换为json格式

string JSonString = new JavaScriptSerializer().Serialize(raumObject).ToString()

Answer 2

use the JavascriptSerializer Serialize function or another serializer like Json.NET

EDIT:

with JavascriptSerializer :

new JavascriptSerializer().Serialize(new{d=raumObject.ToArray()});

EDIT 2:

To have keys for your values do not store your values in a List:

internal static string[] Raum()
{
    List<object> raumObject = new List<object>();

    using (SqlConnection con = new SqlConnection(@"Data Source=Localhost\SQLEXPRESS;Initial Catalog=BOOK-IT-V2;Integrated Security=true;"))
    using (SqlCommand cmd = new SqlCommand(@"SELECT NAME, EMAIL FROM RAUM", con))
    {
        con.Open();
        using (SqlDataReader rdr = cmd.ExecuteReader())
        {
            while (rdr.Read())
            {
                if (rdr["NAME"] != DBNull.Value && rdr["EMAIL"] != DBNull.Value)
                {
                    raumObject.Add(new{
                         Name=rdr["NAME"].ToString(),
                         Email=rdr["EMAIL"].ToString()
                    });
                }
            }
        }
    }

    return  new JavaScriptSerializer().Serialize(new{d=raumObject.ToArray()});
}