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Serializing a Windows.From object

Posted on 2008-06-22
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Last Modified: 2013-11-07
Hello,

I have a windows app and I want to serialize a Windows.Form object. I tried to serialize it using BinaryFormatter but I got SerializationException because the Windows.Form class is not marked as serializable
I've found a solution at www.codeproject.com/KB/dotnet/Surrogate_Serialization.aspx . But it requires a lot of code to be written and it doesn't seem a good way.

So, is there a way to solve this problem or another approach to save the object permanently in HD


thanks in advance.
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Question by:bur3001
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9 Comments
 
LVL 18

Expert Comment

by:vbturbo
ID: 21841128
Have you tried to mark/tag the Form object as serializeable ?

    [Serializable]
    class Form1
{


}

I havent tried to serialize a Form object but here is how you do it with a class

vbturbo
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;
 
namespace Serialize_People
{
    // A simple program that accepts a name, year, month date,
    // creates a Person object from that information, 
    // and then displays that person's age on the console.
    class Program
    {
        static void Main(string[] args)
        {
            if (args.Length == 0)
            {
                // If they provide no arguments, display the last person
                Person p = Deserialize();
                Console.WriteLine(p.ToString());
            }
            else
            {
                try
                {
                    if (args.Length != 4)
                    {
                        throw new ArgumentException("You must provide four arguments.");
                    }
 
                    DateTime dob = new DateTime(Int32.Parse(args[1]), Int32.Parse(args[2]), Int32.Parse(args[3]));
                    Person p = new Person(args[0], dob);
                    Console.WriteLine(p.ToString());
 
                    Serialize(p);
                }
                catch (Exception ex)
                {
                    DisplayUsageInformation(ex.Message);
                }
            }
        }
 
        private static void DisplayUsageInformation(string message)
        {
            Console.WriteLine("\nERROR: Invalid parameters. " + message);
            Console.WriteLine("\nSerialize_People \"Name\" Year Month Date");
            Console.WriteLine("\nFor example:\nSerialize_People \"Tony\" 1922 11 22");
            Console.WriteLine("\nOr, run the command with no arguments to display that previous person.");
        }
 
        private static void Serialize(Person sp)
        {
            // Create file to save the data to
            FileStream fs = new FileStream("Person.Dat", FileMode.Create);
 
            // Create a BinaryFormatter object to perform the serialization
            BinaryFormatter bf = new BinaryFormatter();
 
            // Use the BinaryFormatter object to serialize the data to the file
            bf.Serialize(fs, sp);
 
            // Close the file
            fs.Close();
        }
 
        private static Person Deserialize()
        {
            Person dsp = new Person();
 
            // Open file to read the data from
            FileStream fs = new FileStream("Person.Dat", FileMode.Open);
 
            // Create a BinaryFormatter object to perform the deserialization
            BinaryFormatter bf = new BinaryFormatter();
 
            // Use the BinaryFormatter object to deserialize the data to from file
            dsp = (Person)bf.Deserialize(fs);
 
            // Close the file
            fs.Close();
 
            return dsp;
        }
    }
 
 
//***********************************************************************************************
 
    [Serializable]
    class Person : IDeserializationCallback
    {
        public string name;
        public DateTime dateOfBirth;
        [NonSerialized]
        public int age;
 
        public Person(string _name, DateTime _dateOfBirth)
        {
            name = _name;
            dateOfBirth = _dateOfBirth;
            CalculateAge();
        }
 
        public Person()
        {
        }
 
        public override string ToString()
        {
            return name + " was born on " + dateOfBirth.ToShortDateString() + " and is " + age.ToString() + " years old.";
        }
 
        private void CalculateAge()
        {
            age = DateTime.Now.Year - dateOfBirth.Year;
 
            // If they haven't had their birthday this year, 
            // subtract a year from their age
            if (dateOfBirth.AddYears(DateTime.Now.Year - dateOfBirth.Year) > DateTime.Now)
            {
                age--;
            }
        }
 
        void IDeserializationCallback.OnDeserialization(Object sender)
        {
            // After deserialization, calculate the age
            CalculateAge();
        }
    }
}

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Author Comment

by:bur3001
ID: 21841206
thanks vbturbo,

I marked the class that inherits from Windows.Forms.From as [Serializable] but no success, because I can't mark the base class.
0
 
LVL 18

Expert Comment

by:vbturbo
ID: 21841228
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Author Comment

by:bur3001
ID: 21841355

ok, if i can't serialize a From object, is there another approach to save the object?
0
 
LVL 18

Expert Comment

by:vbturbo
ID: 21841665
Depends on the context!

If you want to save time building up the window again and againg with the same static data you could
Cache the object instead.

http://www.codeproject.com/KB/cs/cacheinwinformapps.aspx

vbturbo
0
 

Author Comment

by:bur3001
ID: 21857805
First of all, I'm sorry for my late response.
What I understood from the web page you pointed out about cashing is that cash class can be used to save an object in memory NOT in HD and I want the object to be saved in a file not in memory.

Thanks.
0
 
LVL 18

Accepted Solution

by:
vbturbo earned 2000 total points
ID: 21864008
perhaps this approach could be an idea

http://www.codeproject.com/KB/menus/XMLMenu.aspx

Building up your form with controls saved in a xml file

vbturbo
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