Binary file

[Durand]

How can I write/read a structure into a binary file?

Thanks

Durand

 

[Ben Taitelbaum]

There are a few ways to do this, depending on how much control you want.
The easiest is to use the [Serializable] attribute. For example,

[Serializable]
public class Ubiquity
{
private Foo f;
public Ubiquity(Foo F)
{
this.f = f;
}
// some other stuff
}

[Serializable]
public class Foo
{
private int a;
public Foo(int A)
{
this.a = A;
}
// class stuff
}

now, when you want to read/write instances of this class:

using System;
using System.IO;
using System.Runtime.Serialization.Formatters.Binary;
public class Testing
{
public static void Main(string[] args)
{
Ubiquity u = new Ubiquity(new Foo(100));

// write u to a binary file
// copied from
"ms-help://MS.VSCC.2003/MS.MSDNQTR.2003APR.1033/cpguide/html/cpconbasicserialization.htm"

IFormatter formatter = new BinaryFormatter();
Stream stream = new FileStream("MyFile.bin", FileMode.Create,
FileAccess.Write, FileShare.None);
formatter.Serialize(stream, obj);
stream.Close();

// read the object back from the file
stream = new FileStream("MyFile.bin", FileMode.Open, FileAccess.Read,
FileShare.Read);
MyObject obj = (Ubiquity) formatter.Deserialize(stream);
stream.Close();
}
}

Note that this is an error situation if we don't have [Serializable]
just before class Foo, because Foo will be serialized as well.

See also: ISerializable interfae, SOAP/XML serialization

 

[Sherif ElMetainy]

Hello

In addition to the method in the previous post, you can check the
System.IO.BinaryWriter and System.IO.BinaryReader classes the would provide
better performance and smaller file size than serialization, but require
more work from your side

Best Regards

Sherif

 

[Chris Capel]

If there are certain members of a class that don't need to be serialized (or
can't), then mark them with the NonSerializable attribute. This is required
on some things like delegates, or framework classes that don't serialize.

Chris

There are a few ways to do this, depending on how much control you want.
The easiest is to use the [Serializable] attribute. For example,

[Serializable]
public class Ubiquity
{
private Foo f;
public Ubiquity(Foo F)
{
this.f = f;
}
// some other stuff
}

[Serializable]
public class Foo
{
private int a;
public Foo(int A)
{
this.a = A;
}
// class stuff
}

now, when you want to read/write instances of this class:

using System;
using System.IO;
using System.Runtime.Serialization.Formatters.Binary;
public class Testing
{
public static void Main(string[] args)
{
Ubiquity u = new Ubiquity(new Foo(100));

// write u to a binary file
// copied from
"ms-help://MS.VSCC.2003/MS.MSDNQTR.2003APR.1033/cpguide/html/cpconbasicseria
lization.htm"

IFormatter formatter = new BinaryFormatter();
Stream stream = new FileStream("MyFile.bin", FileMode.Create,
FileAccess.Write, FileShare.None);
formatter.Serialize(stream, obj);
stream.Close();

// read the object back from the file
stream = new FileStream("MyFile.bin", FileMode.Open, FileAccess.Read,
FileShare.Read);
MyObject obj = (Ubiquity) formatter.Deserialize(stream);
stream.Close();
}
}

Note that this is an error situation if we don't have [Serializable]
just before class Foo, because Foo will be serialized as well.

See also: ISerializable interfae, SOAP/XML serialization

How can I write/read a structure into a binary file?

Thanks

Durand