private void GetUserInfoHead() { StringWriter sw = new StringWriter(); Newtonsoft.Json.JsonWriter writer = new Newtonsoft.Json.JsonTextWriter(sw); string username = userMethod.CheckUserIndentity_Username(); if (username.Trim() != "") { writer.WriteStartObject(); writer.WritePropertyName("status"); writer.WriteValue("200"); writer.WritePropertyName("username"); writer.WriteValue(username); writer.WriteEndObject(); writer.Flush(); } else { writer.WriteStartObject(); writer.WritePropertyName("status"); writer.WriteValue("200"); writer.WritePropertyName("username"); writer.WriteValue(""); writer.WriteEndObject(); writer.Flush(); } string jsonText = sw.GetStringBuilder().ToString(); Response.Write(jsonText); }