I am developing a web service , in which i need to return user type objects as json response. But i am unable to achieve it using this code. \[code\]public class BioMatricUsers : System.Web.Services.WebService { public BioMatricUsers() { } public class my_user { public my_user(string i, string b, string l) { id = i; badgeNumber = b; login = l; } public string id { get; set; } public string badgeNumber { get; set; } public string login { get; set; } } [WebMethod] [ScriptMethod(ResponseFormat = ResponseFormat.Json)] public string GetUsers() { OleDbConnection co = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\Users\confiz\Desktop\att2000.mdb"); c
pen(); OleDbCommand cmd = new OleDbCommand("SELECT * FROM USERINFO", co); OleDbDataReader reader = cmd.ExecuteReader(); string jsonString = ""; int i = 1; MemoryStream ms = new MemoryStream(); my_user user = null; Type type = user.GetType(); while (reader.Read() && i <= 2) { DataContractJsonSerializer serializer = new DataContractJsonSerializer(user.GetType()); user = new my_user(reader["USERID"].ToString(), reader["badgenumber"].ToString(), reader["SSN"].ToString()); serializer.WriteObject(ms, user); jsonString = Encoding.Default.GetString(ms.ToArray()); i++; } ms.Close(); co.Close(); return jsonString; }}\[/code\]i am getting null reference error at this line.DataContractJsonSerializer serializer = new DataContractJsonSerializer(user.GetType())
pen(); OleDbCommand cmd = new OleDbCommand("SELECT * FROM USERINFO", co); OleDbDataReader reader = cmd.ExecuteReader(); string jsonString = ""; int i = 1; MemoryStream ms = new MemoryStream(); my_user user = null; Type type = user.GetType(); while (reader.Read() && i <= 2) { DataContractJsonSerializer serializer = new DataContractJsonSerializer(user.GetType()); user = new my_user(reader["USERID"].ToString(), reader["badgenumber"].ToString(), reader["SSN"].ToString()); serializer.WriteObject(ms, user); jsonString = Encoding.Default.GetString(ms.ToArray()); i++; } ms.Close(); co.Close(); return jsonString; }}\[/code\]i am getting null reference error at this line.DataContractJsonSerializer serializer = new DataContractJsonSerializer(user.GetType())