实战 .Net 数据访问层 - 21

public static class EntityConvert

{

    public static IList ToList(DbDataReader rdr, Type entity)

    {

       ArrayList list = new ArrayList();

       using (rdr)

       {

           while (rdr.Read())

           {

              object obj = ToObject(rdr, entity, false);

               if (obj != null)

                  list.Add(obj);

           }

       }

       return list;

    }

public static object ToObject(DbDataReader rdr,

Type entity, bool bNeedRead)

    {

       object obj = null;

       if (!bNeedRead || rdr.Read())

       {

           // 创建Data Entity对象

           obj = Activator.CreateInstance(entity);

           // 设置Data Entity对象之字段数据

           FieldInfo[] fields = entity.GetFields(

BindingFlags.Instance | BindingFlags.Public);

           foreach (FieldInfo field in fields)

           {

              string fieldName = field.Name;

               object fieldValue = rdr[fieldName];

              if (fieldValue == System.DBNull.Value)

                  field.SetValue(obj, null);

              else

                  field.SetValue(obj, fieldValue);

           }

           if (bNeedRead && !rdr.Read())

              rdr.Close();

       }

       return obj;

    }

}