编写轻量ajax组件第三篇实现

　　定义一个DataMemberManager，用来遍历Type，获取所有字段和属性的，实现如下：

 internal static class DataMemberManager
  {
    /// <summary>
    /// 获取实例字段/属性集合
    /// </summary>
    /// <param name="type">类型</param>
    /// <returns></returns>
    public static List<DataMember> GetDataMember(Type type)
    {
      if (type == null)
      {
        throw new ArgumentNullException("type");
      }
      IEnumerable<PropertyMember> propertyMembers = from property in type.GetProperties(BindingFlags.Instance | BindingFlags.Public)
                         select new PropertyMember(property);
      IEnumerable<FieldMember> fieldMembers = from field in type.GetFields(BindingFlags.Instance | BindingFlags.Public)
                       select new FieldMember(field);
      List<DataMember> members = new List<DataMember>();
      foreach(var property in propertyMembers)
      {
        members.Add(property);
      }
      foreach (var field in fieldMembers)
      {
        members.Add(field);
      }
      return members;
    }
  }

　　在前面我们定义的Handler的ProcessRequest方法中，我们调用了Executor.Execute，该方法用于执行委托，实现如下：

 /// <summary>
    /// 核心函数，执行Handler的方法
    /// </summary>
    /// <param name="page">页面对象</param>
    /// <param name="context">请求上下文</param>
    /// <param name="cacheMethodInfo">缓存方法原数据</param>
    internal static void Execute(Page page, HttpContext context, CacheMethodInfo methodInfo)
    {
      if (page == null)
      {
        throw new ArgumentNullException("page");
      }
      try
      {
        if (methodInfo != null)
        {
          HttpRequest request = context.Request;
          object[] parameters = GetParametersFromRequest(request, methodInfo.Parameters);
          object data = methodInfo.Func(page, parameters);
          int serverCache = methodInfo.AjaxMethodAttribute.ServerCache;
          if (serverCache > 0)
          {
            CacheHelper.Insert(context, methodInfo.AjaxMethodAttribute.ServerCache, data);
          }
          EndCurrentRequest(context, data, methodInfo.AjaxMethodAttribute.OutputCache);
        }
        else
        {
          EndCurrentRequest(context, "找不到合适的Ajax方法！");
        }
      }
      catch (FormatException)
      {
        EndCurrentRequest(context, "调用方法匹配到无效的参数！");
      }
      catch (InvalidCastException)
      {
        EndCurrentRequest(context, "参数转换出错！");
      }
      catch (System.Threading.ThreadAbortException)
      {
        //do nothing
      }
      catch (Exception ex)
      {
        EndCurrentRequest(context, ex.Message);
      }
    }

　　CacheMethodInfo我们已经获得了，现在只要获得参数我们就可以执行方法。