DBUtility/DbHelperSQL2.cs

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using System;
using System.Collections;
using System.Collections.Specialized;
using System.Data;
using System.Data.SqlClient;

using System.Data.Common;
using Microsoft.Practices.EnterpriseLibrary.Data;

namespace Maticsoft.DBUtility
{
	/// <summary>
    /// Enterprise Library 2.0 数据访问进一步封装类
	/// Copyright (C) 2006-2008 LiTianPing
	/// All rights reserved	
	/// </summary>
	public abstract class DbHelperSQL2
	{        
		public DbHelperSQL2()
		{
        }

        #region 公用方法

        public static int GetMaxID(string FieldName,string TableName)
        {
            string strSql = "select max(" + FieldName + ")+1 from " + TableName;
            Database db = DatabaseFactory.CreateDatabase();
            DbCommand dbCommand = db.GetSqlStringCommand(strSql);           
            object obj = db.ExecuteScalar(dbCommand);
            if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
            {
                return 1;
            }
            else
            {
                return int.Parse(obj.ToString());
            }           
        }
		public static bool Exists(string strSql)
		{
            Database db = DatabaseFactory.CreateDatabase();
            DbCommand dbCommand = db.GetSqlStringCommand(strSql);
            object obj = db.ExecuteScalar(dbCommand);
			int cmdresult;
			if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
			{
				cmdresult = 0;
			}
			else
			{
				cmdresult = int.Parse(obj.ToString());
			}
			if (cmdresult == 0)
			{
				return false;
			}
			else
			{
				return true;