What is the correct project type for XML and Binary?

Question

User766850287 posted

I have been using ASP.NET Web Application and webforms for all my old projects, and now I wanted to try and save one of my older projects as an XML and Binary file. I am actually not getting any errors, but I am not getting any output either. It does not show my data or create an XML file in the folder I specified. So I wonder if the reason for that is that I am using a Web Application form. What should I use instead?

Here is the code. As I said, I get no error messages, so I don´t know if there are any mistakes in the code itself.

Keycard.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;

namespace Keycard
{
    [Serializable()]
    public class Keycard : ISerializable
    {
        protected string name;
        protected int mykey;

        public Keycard(string name, int mykey)
        {
            this.Name = name;
            this.Mykey = mykey;
        }

        public string Name
        {
            get { return name; }
            set { name = value; }
        }

        public int Mykey
        {
            get { return mykey; }
            set { mykey = value; }
        }

        public void GetObjectData(SerializationInfo info, StreamingContext context)
        {

            info.AddValue("Name", name);
            info.AddValue("Keynumber", mykey);
  
        }
        public Keycard(SerializationInfo info, StreamingContext context)
        {
            Name = (string)info.GetValue("Name", typeof(string));
            Mykey = (int)info.GetValue("Keynumber", typeof(int));
        }

        public override string ToString()
        {
            return "Name: " + name + " ---- " + " Keynumber: " + mykey;
        }
    }
}

index.aspx.cs

using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Configuration;
using System.Xml.Serialization;
using System.IO;
using System.Runtime.Serialization.Formatters.Binary;

namespace Keycard
{
    public partial class Index : System.Web.UI.Page
    {
        public void Main(string[] args)
        {
            Keycard d1 = new Keycard("John", 102030);

            Stream stream = File.Open("KeycardData.dat",
                FileMode.Create);

            BinaryFormatter bf = new BinaryFormatter();

            bf.Serialize(stream, d1);
            stream.Close();

            d1 = null;

            stream = File.Open("KeycardData.dat", FileMode.Open);

            bf = new BinaryFormatter();

            d1 = (Keycard)bf.Deserialize(stream);
            stream.Close();
            Console.WriteLine(d1.ToString());

            XmlSerializer serializer = new XmlSerializer(typeof(Keycard));

            using(TextWriter tw = new StreamWriter(@"L\C#\keycards.xml"))
            {
                serializer.Serialize(tw, d1);
            }

            d1 = null;

            XmlSerializer deserializer = new XmlSerializer(typeof(Keycard));
            TextReader reader = new StreamReader(@"L\C#\keycards.xml");
            object obj = deserializer.Deserialize(reader);
            d1 = (Keycard)obj;
            reader.Close();
            Console.WriteLine(d1.ToString());
        }

    }
}

Answer 1

User288213138 posted

Hi McQvist,

public void Main(string[] args)

If you debug your code in web form, you will find that you have not called this method.

I suggest you can put the code in the Page_Load method. If you want to output something in a web form, you should use Response.Write () method.

 protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)
            {
                Keycard d1 = new Keycard("John", 102030);
                Stream stream = File.Open("KeycardData.dat",FileMode.Create);
                BinaryFormatter bf = new BinaryFormatter();
                bf.Serialize(stream, d1);
                stream.Close();

                d1 = null;

                stream = File.Open("KeycardData.dat", FileMode.Open);

                bf = new BinaryFormatter();

                d1 = (Keycard)bf.Deserialize(stream);
                stream.Close();
                Console.WriteLine(d1.ToString());

                XmlSerializer serializer = new XmlSerializer(typeof(Keycard));

                using (TextWriter tw = new StreamWriter(@"L\C#\keycards.xml"))
                {
                    serializer.Serialize(tw, d1);
                }

                d1 = null;

                XmlSerializer deserializer = new XmlSerializer(typeof(Keycard));
                TextReader reader = new StreamReader(@"L\C#\keycards.xml");
                object obj = deserializer.Deserialize(reader);
                d1 = (Keycard)obj;
                reader.Close();
                Response.Write(d1.ToString());
            }
        }      

And you should add a parameterless constructor into Keycard class, Otherwise it cannot be serialized.

public class Keycard : ISerializable
    {
        public Keycard()
        {

        }
     }

This is my test result:

Best regards,

Sam