APCGC_CBS.DAL/DataAccess/DbHelperSQL.cs

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using System;
using System.Collections;
using System.Collections.Specialized;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using System.Collections.Generic;
using System.Text;

namespace APCGC_CBS.DAL.DataAccess
{
    public class CommandInfo
    {
        public string CommandText;
        public SqlParameter[] Parameters;
    }
    public abstract class DbHelperSQL
    {
        //数据库连接字符串(web.config来配置)，可以动态更改connectionString支持多数据库.		
        protected static String connectionString = ConfigurationManager.ConnectionStrings["SqlServerConnection"].ConnectionString;
        public DbHelperSQL()
        {

        }

        /// <summary>
        /// 获取一个数据库连接
        /// </summary>
        /// <returns></returns>
        public static SqlConnection GetSqlConnection()
        {
            return new SqlConnection(connectionString);
        }

        #region 公用方法

        public static int GetMaxID(string FieldName, string TableName)
        {
            string strsql = "select max(" + FieldName + ")+1 from " + TableName;
            object obj = DbHelperSQL.GetSingle(strsql);
            if (obj == null)
            {
                return 1;
            }
            else
            {
                return int.Parse(obj.ToString());
            }
        }
        public static bool Exists(string strSql)
        {
            object obj = DbHelperSQL.GetSingle(strSql);
            int cmdresult;
            if ((Object.Equals(obj, null)) || (Object.Equals(obj, System.DBNull.Value)))
            {
                cmdresult = 0;
            }
            else
            {
                cmdresult = int.Parse(obj.ToString());