EntityBase

using System;
using System.Collections;

namespace SysUtility
{
 /// <summary>
 /// EntityBase 的摘要说明。
 /// </summary>
 public abstract class EntityBase
 {
  public delegate void ChangePropertyEventHandler(object sender, EventArgs e);
  /// <summary>
  /// 获取实体对应的表名
  /// </summary>
  public abstract string TableName
  {
   get;
  }
  
  /// <summary>
  /// 构造函数，初始化EntityBase类的新实例。
  /// </summary>
  public EntityBase()
  {
   
  }
  
  private Hashtable changedList = new Hashtable();
  /// <summary>
  /// 已经改变的属性表
  /// </summary>
  public Hashtable ChangedList
  {
   get { return changedList; }
  }
  /// <summary>
  /// 属性值更改时做个标记。
  /// </summary>
  /// <param name="sender">事件源</param>
  /// <param name="e">事件参数</param>
  public virtual void FillChangeProperty(object sender, EventArgs e)
  {
   EntityField field = sender as EntityField;
   if ( field != null )
   {
    if ( changedList.Contains(field.Name) )
    {
     changedList[field.Name] = field.Value;
    }
    else
    {
     changedList.Add(field.Name, field.Value);
    }
   }
  }
 }
}