Question

多个对象序列化和反序列化

假设有一个account类，现要求实现
1.将一个account类数组中的多个对象保存到txt文件中，
2.从文件中读出各对象保存到数组中。
请着重写清读的时候怎么从文件中读出一个一个的对象。
知道用序列化和反序列化，就请大侠们从这方面教教.
麻烦用二进制序列化和反序列化，谢谢。
1楼大侠能不能再写下

Answer 1

没什么好说的，写个例子给你看吧，有些代码用了VS2008的特性，如果你用的是VS2008以下的版本，自己改下吧。

using System;
using System.Text;
using System.IO;
using System.Xml.Serialization;

namespace Demo
{

public class Account
{
public int UserID { get; set; }
public string Username { get; set; }
}

class Program
{
static void Main( string[] args )
{
Account[] accounts = {
new Account(){ UserID = 1, Username = "test1" },
new Account(){ UserID = 2, Username = "test2" },
new Account(){ UserID = 3, Username = "test3" }
};

string savePath = @"c:\XmlSerializerTest.txt";
XmlSerializer xs = new XmlSerializer( typeof( Account[] ) );
using ( TextWriter tw = new StreamWriter( savePath ) )
{
xs.Serialize( tw, accounts );
tw.Close();
using ( TextReader tr = new StreamReader( savePath ) )
{
Account[] deSerializedValue = xs.Deserialize( tr ) as Account[];
if ( deSerializedValue != null && deSerializedValue.Length > 0 )
{
for ( int i = 0; i < deSerializedValue.Length; i++ )
{
Console.WriteLine( "{0}\tUserID = {1}, Username = {2}", i, deSerializedValue[ i ].UserID, deSerializedValue[ i ].Username );
}
}
}
}

Console.ReadKey();
}
}

}

//----------二进制方式，可以使用BinaryFormatter 类来以二进制格式将对象或整个连接对象图形序列化和反序列化
using System;
using System.IO;
using System.Runtime.Serialization.Formatters.Binary;

namespace Demo
{
[Serializable]
public class Account
{
public int UserID { get; set; }
public string Username { get; set; }
}

class Program
{
static void Main( string[] args )
{
Account[] accounts = {
new Account(){ UserID = 1, Username = "test1" },
new Account(){ UserID = 2, Username = "test2" },
new Account(){ UserID = 3, Username = "test3" }
};

string savePath = @"c:\BinarySerializerTest.bin";
BinaryFormatter formatter = new BinaryFormatter();

using ( FileStream writeStream = new FileStream( savePath, FileMode.Create, FileAccess.Write ) )
{
formatter.Serialize( writeStream, accounts );
//xs.Serialize( tw, accounts );
writeStream.Close();
using ( FileStream readStream = new FileStream( savePath, FileMode.Open, FileAccess.Read ) )
{
Account[] deSerializedValue = formatter.Deserialize( readStream ) as Account[];
if ( deSerializedValue != null && deSerializedValue.Length > 0 )
{
for ( int i = 0; i < deSerializedValue.Length; i++ )
{
Console.WriteLine( "{0}\tUserID = {1}, Username = {2}", i, deSerializedValue[ i ].UserID, deSerializedValue[ i ].Username );
}
}
}
}

Console.ReadKey();
}
}

}