SearchModel Restructure

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SearchModel

  public void PrivateInit(int pageSize)
        {
            if (Page == 0)
                Page = 1;
            if (Items == null)
                Items = new List<SearchItem>();
            if (ParamList == null)
                ParamList = new List<object>();
            PageSize = pageSize;
        }

改为定义时初始化

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SearchModel.ParamList 已经没有使用，去除