利用反射自定义序列化DataSet

首先定义两个实体类：OFFICEData，UserData

OFFICEData：
[System.ComponentModel.DesignerCategory("Code")]
    [SerializableAttribute] 
    public class OFFICEData: DataSet,ISerializable
    {
        
                    
        public const string T_OFFICE_OFFICEID="OFFICEID";            
        public const string T_OFFICE_CODENO="CODENO";            
        public const string T_OFFICE_SPELLNO="SPELLNO";            
        public const string T_OFFICE_CUSTOMNO="CUSTOMNO";            
        public const string T_OFFICE_STROKENO="STROKENO";            
        public const string T_OFFICE_OFFICE="OFFICE";            
        public const string T_OFFICE_DISEASEAREA="DISEASEAREA";            
        public const string T_OFFICE_BEDAMOUNT="BEDAMOUNT";            
        public const string T_OFFICE_LIMITFUND="LIMITFUND";            
        public const string T_OFFICE_OFFICETYPE="OFFICETYPE";            
        public const string T_OFFICE_DEPARTMENT="DEPARTMENT";            
        public const string T_OFFICE_POSITION="POSITION";
        
        
        
        private DataTable table;
        private DataColumn col;
        private ArrayList list;
    
        private UserData user = new UserData();
        public UserData userData
        {
            get{return this.user ;}
            set{this.user = value;}
        }

        private OFFICEData(SerializationInfo info, StreamingContext context) : base(info, context) 
        {
                userData=(UserData)info.GetValue("myData",typeof(Serialize.UserData));
        }
        
        public OFFICEData()
        {
            
            BuildDataTables();
        }

        public void GetObjectData(SerializationInfo info,StreamingContext text)
        {
            Type t = typeof(DataSet);

            MethodInfo mi =t.GetMethod("System.Runtime.Serialization.ISerializable.GetObjectData",BindingFlags.Instance |BindingFlags.NonPublic );
            mi.Invoke(this,new object[]{info,text});

            info.AddValue("myData",userData);
        }

        //构建业务实体类的结构。
        private void BuildDataTables()
        {
            
            table   = new DataTable("T_OFFICE");
                            
            table.Columns.Add("OFFICEID",typeof(System.Decimal));            
            table.Columns.Add("CODENO",typeof(System.String));            
            table.Columns.Add("SPELLNO",typeof(System.String));            
            table.Columns.Add("CUSTOMNO",typeof(System.String));            
            table.Columns.Add("STROKENO",typeof(System.String));            
            table.Columns.Add("OFFICE",typeof(System.String));            
            table.Columns.Add("DISEASEAREA",typeof(System.String));            
            table.Columns.Add("BEDAMOUNT",typeof(System.Decimal));            
            table.Columns.Add("LIMITFUND",typeof(System.Decimal));            
            table.Columns.Add("OFFICETYPE",typeof(System.String));            
            table.Columns.Add("DEPARTMENT",typeof(System.String));            
            table.Columns.Add("POSITION",typeof(System.String));
            list=new ArrayList();
                
            col=table.Columns["OFFICEID"];
            list.Add(col);
                
                
            table.PrimaryKey=(DataColumn[])list.ToArray(typeof(DataColumn));
            this.Tables.Add(table);        
        }   
}

UserData:
[System.ComponentModel.DesignerCategory("Code")]
    [SerializableAttribute] 
    public class UserData: DataSet
    {
        
                    
        public const string T_USERS_UserID="UserID";            
        public const string T_USERS_CodeNo="CodeNo";            
        public const string T_USERS_SpellNo="SpellNo";            
        public const string T_USERS_CustomNo="CustomNo";            
        public const string T_USERS_StrokeNo="StrokeNo";            
        public const string T_USERS_UserName="UserName";            
        public const string T_USERS_Sex="Sex";            
        public const string T_USERS_Birthday="Birthday";            
        public const string T_USERS_Nation="Nation";            
        public const string T_USERS_Diploma="Diploma";            
        public const string T_USERS_Office="Office";            
        public const string T_USERS_LaborageNo="LaborageNo";            
        public const string T_USERS_Duty="Duty";            
        public const string T_USERS_PledgeMoney="PledgeMoney";            
        public const string T_USERS_WorkKind="WorkKind";
        
        private DataTable table;
        private DataColumn col;
        private ArrayList list;
        
        
        private UserData(SerializationInfo info, StreamingContext context) : base(info, context) 
        {
        }
        
        public UserData()
        {
            
            BuildDataTables();
        }
        
        //构建业务实体类的结构。
        private void BuildDataTables()
        {
            
            table   = new DataTable("T_USERS");
                            
            table.Columns.Add("UserID",typeof(System.Int32));            
            table.Columns.Add("CodeNo",typeof(System.String));            
            table.Columns.Add("SpellNo",typeof(System.String));            
            table.Columns.Add("CustomNo",typeof(System.String));            
            table.Columns.Add("StrokeNo",typeof(System.String));            
            table.Columns.Add("UserName",typeof(System.String));            
            table.Columns.Add("Sex",typeof(System.String));            
            table.Columns.Add("Birthday",typeof(System.DateTime));            
            table.Columns.Add("Nation",typeof(System.String));            
            table.Columns.Add("Diploma",typeof(System.String));            
            table.Columns.Add("Office",typeof(System.String));            
            table.Columns.Add("LaborageNo",typeof(System.String));            
            table.Columns.Add("Duty",typeof(System.String));            
            table.Columns.Add("PledgeMoney",typeof(System.Decimal));            
            table.Columns.Add("WorkKind",typeof(System.String));
            list=new ArrayList();
                
            col=table.Columns["UserID"];
            list.Add(col);
                
                
            table.PrimaryKey=(DataColumn[])list.ToArray(typeof(DataColumn));
            this.Tables.Add(table);
                
                
        
        }
        
        
        
    }

因为DataSet实现了序列化接口ISerializable，而基类的DataSet.GetObjectData是私有的，
如果从实现了 ISerializable 的类派生出一个新的类，则只要新的类中含有任何需要序列化的变量，
就必须同时实现构造函数以及 GetObjectData 方法
 DataSet实现了ISerializable，但是，他确封装了GetObjectData方法
所以在OFFICEData.GetObjectData中利用反射调用DataSet.GetObjectData方法.