Common/DataSetSurrogate.cs

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using System;
using System.IO;
using System.ComponentModel;
using System.Collections;
using System.Globalization;
using System.Xml;
using System.Data;
using System.Runtime.Serialization;
using System.Diagnostics;

/*
    Author : Ravinder Vuppula.
    Purpose : To implement binary serialization of the DataSet through a Surrogate object.
    Notes:  
        1. All the surrogate objects DataSetSurrogate, DataTableSurrogate, DataColumnSurrogate are marked [Serializable] and hence will get automatically serialized by the remoting framework.
        2. The data is serialized in binary "column" wise.
        3. This class can be used as a wrapper around DataSet. A DataSetSurrogate object can be constructed from DataSet and vice-versa. This helps if the user wants to wrap the DataSet in DataSetSurrogate and serialize and deserialize DataSetSurrogate instead.
    History:
    05/10/04 - Fix for the  issue of serializing default values.
*/

[Serializable]
public class DataSetSurrogate {
    //DataSet properties
    private string _datasetName;
    private string _namespace;
    private string _prefix;        
    private bool _caseSensitive;
    private CultureInfo _locale;
    private bool _enforceConstraints;
    
    //ForeignKeyConstraints
    private ArrayList _fkConstraints;//An ArrayList of foreign key constraints :  [constraintName]->[parentTableIndex, parentcolumnIndexes]->[childTableIndex, childColumnIndexes]->[AcceptRejectRule, UpdateRule, Delete]->[extendedProperties]
    
    //Relations
    private ArrayList _relations;//An ArrayList of foreign key constraints : [relationName]->[parentTableIndex, parentcolumnIndexes]->[childTableIndex, childColumnIndexes]->[Nested]->[extendedProperties]
    
    //ExtendedProperties
    private Hashtable _extendedProperties;
    
    //Columns and Rows
    private DataTableSurrogate[] _dataTableSurrogates;
            
/*
    Constructs a DataSetSurrogate object from a DataSet.
*/
    public DataSetSurrogate(DataSet ds) {
        if (ds == null) {
            throw new ArgumentNullException("The parameter dataset is null");
        }
        
        //DataSet properties
        _datasetName = ds.DataSetName;
        _namespace = ds.Namespace;
        _prefix = ds.Prefix;
        _caseSensitive = ds.CaseSensitive;
        _locale = ds.Locale;
        _enforceConstraints = ds.EnforceConstraints;
        
        //Tables, Columns, Rows