using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Text;
using System.IO;
using System.Text.RegularExpressions;


namespace DingHaokai.BussinessLogic
{
	/// <summary>
	/// BaseBL為BL層的基類，所有由WEB層調用的BL層都繼承這個類
	/// </summary>
	public class BaseBL
	{
		private string errorMsg;

		public BaseBL()
		{
			
		}
	
		/// <summary>
		/// 清除指定數(shù)據(jù)表及關聯(lián)表中所有數(shù)據(jù)
		/// </summary>
		/// <param name="tb">指定的數(shù)據(jù)表對象</param>
		public void ClearData(DataTable tb)
		{
			foreach (DataRelation r in tb.DataSet.Relations)
			{
				if (r.ParentTable == tb && r.ChildTable.Rows.Count>0)
					ClearData(r.ChildTable);
			}
			tb.Clear();
		}

		/// <summary>
		/// 接受數(shù)據(jù)集中所有表的刪除行操作
		/// </summary>
		public void AcceptDeletedRows(DataSet ds)
		{
			foreach(DataTable tb in ds.Tables)
			{
				AcceptDeletedRows(tb);
			}
		}

		/// <summary>
		/// 接受數(shù)據(jù)表中所有刪除行操作
		/// </summary>
		public void AcceptDeletedRows(DataTable tb)
		{
			AcceptChangedRows(tb.Select("", "", DataViewRowState.Deleted));
		}

		/// <summary>
		/// 接受數(shù)據(jù)行數(shù)組中所有數(shù)據(jù)行的改變
		/// </summary>
		/// <param name="rows"></param>
		public void AcceptChangedRows(DataRow[] rows)
		{
			foreach(DataRow row in rows)
			{
				row.AcceptChanges();
			}
		}

		
		/// <summary>
		/// 獲取或者設置單條錯誤信息
		/// </summary>
		public string ErrorMessage
		{
			get { return errorMsg; }
			set { errorMsg = value; }
		}

		

		
	}
}