实例演示CodeSmith与ECC开发模式结合---快速建站(三)

接着上面,文章相应的DAO逻辑 已经写好了，但我们这时也会发现,少了个执行SQL 的Helper，在这里，我用了早期的PETSHOP的Helper作了个小的改动，如下:

using System;
using System.Configuration;
using System.Data;
using System.Data.OleDb;

namespace BreakerLib
...{

    /**//// <summary>
    ///  DAOHelper
    /// </summary>
    public class DAOHelper ...{

        private OleDbConnection con ;
        public int RunSQL(string strSQL)
        ...{
            strSQL = filterSQL(strSQL);
            try
            ...{
                OleDbCommand cmd = CreateCommand(strSQL,null);
                cmd.ExecuteNonQuery();
                this.Close();
                return 0;
            }
            catch...{
              throw new Exception("RunSQL");
            }
        }
        public int RunSQL(string strSQL, OleDbParameter[] prams) 
        ...{
            strSQL = filterSQL(strSQL);
            try
            ...{
                OleDbCommand cmd = CreateCommand(strSQL, prams);
                cmd.ExecuteNonQuery();
                this.Close();
                return 0;
            }
            catch(Exception e)...{
            throw new Exception(e.Message);
        }
        }

        public void RunSQL(string strSQL, out OleDbDataReader dataReader) 
        ...{
            strSQL = filterSQL(strSQL);
            OleDbCommand cmd = CreateCommand(strSQL, null);
            dataReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
            
        }

        public void RunSQL(string strSQL, OleDbParameter[] prams, out OleDbDataReader dataReader) 
        ...{
            strSQL = filterSQL(strSQL);
            OleDbCommand cmd = CreateCommand(strSQL, prams);
            dataReader = cmd.ExecuteReader(CommandBehavior.CloseConnection);
        }
        
        public void Open()
        ...{
            if (con == null) 
            ...{
                string strConnect;
//                strConnect =
//                    @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=E:帮联文件ProjectsKarstBreakerSimplyDataBaseBreakerSimply.mdb";
                strConnect = ConfigurationSettings.AppSettings["DBConnectionString"];
                con = new OleDbConnection(strConnect);
                con.Open();
            }
        }
        public void Close() 
        ...{
            if (con != null)
                con.Close();
        }
        public OleDbCommand CreateCommand(string strSQL, OleDbParameter[] prams)
        ...{
            Open();
            strSQL = filterSQL(strSQL);
            OleDbCommand cmd = new OleDbCommand(strSQL, con);
            cmd.CommandType = CommandType.Text;
            
            if (prams != null) 
            ...{
                foreach (OleDbParameter parameter in prams)
                    cmd.Parameters.Add(parameter);
            }
            return cmd;
        } 
        
        public OleDbParameter MakeInParam(string ParamName, OleDbType DbType, int Size, object Value) 
        ...{
            return MakeParam(ParamName, DbType, Size, ParameterDirection.Input, Value);
        }

        public OleDbParameter MakeParam(string ParamName, OleDbType DbType, Int32 Size, ParameterDirection Direction, object Value) 
        ...{
            OleDbParameter param;

            if(Size > 0)
                param = new OleDbParameter(ParamName, DbType, Size);
            else
                param = new OleDbParameter(ParamName, DbType);

            param.Direction = Direction;
            if (!(Direction == ParameterDirection.Output && Value == null))
                param.Value = Value;

            return param;
        }
        /**//// <summary>
        /// ????
        /// </summary>
        public void Dispose() 
        ...{
            // ????Connection
            if (con != null) 
            ...{
                con.Dispose();
                con = null;
            }                
        }
        public string  filterSQL(string strSQL)
        ...{
            strSQL = strSQL.Replace("'", " ");
            return strSQL;
        }
    }
}