通用分页请求返回类

最新推荐文章于 2023-07-04 20:14:55 发布

转载最新推荐文章于 2023-07-04 20:14:55 发布 · 229 阅读

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CC 4.0 BY-SA版权

原文链接：http://www.cnblogs.com/zhshlimi/p/9072918.html

文章标签：

#runtime

本文介绍了一种通用的分页请求和响应类设计，适用于多种类型的分页操作。此类设计包括了分页的基本属性如页码、每页数量、开始和结束索引，以及序列化和反序列化处理，确保了数据的一致性和默认值设定。

using System.Runtime.Serialization;

    /// <summary>
    /// 通用分页请求类
    /// </summary>
    [DataContract]
    public class PagedListModelReq : Request
    {
        /// <summary>
        /// <strong>Initializes a new instance of the <see cref="</strong>OperationLogReq<strong>" /> class</strong>
        /// OperationLogReq
        /// </summary>
        public PagedListModelReq()
        {
            this.PageIndex = 1;
            this.PageSize = 15;
        }

        /// <summary>
        /// 索引开始
        /// </summary>
        [DataMember]
        public int StartIndex
        {
            get
            {
                int index = 0;
                if (this.PageSize > 0 && this.PageIndex > 0)
                {
                    index = ((this.PageIndex - 1) * this.PageSize) + 1;
                }

                return index;
            }
        }

        /// <summary>
        /// 索引结束
        /// </summary>
        [DataMember]
        public int EndIndex
        {
            get
            {
                int index = 1;
                if (this.PageSize > 0 && this.PageIndex > 0)
                {
                    index = this.PageIndex * this.PageSize;
                }

                return index;
            }
        }

        /// <summary>
        /// 分页大小
        /// </summary>
        [DataMember]
        public int PageSize { get; set; }

        /// <summary>
        /// 第几页数
        /// </summary>
        [DataMember]
        public int PageIndex { get; set; }

        /// <summary>
        /// Called when [deserialized].
        /// </summary>
        /// <param name="context">StreamingContext</param>
        [OnDeserialized]
        private void OnDeserialized(StreamingContext context)
        {
            if (this.PageIndex <= 0)
            {
                this.PageIndex = 1;
            }

            if (this.PageSize <= 0)
            {
                this.PageSize = 15;
            }
        }
    }

    /// <summary>
    /// 通用分页请求类
    /// </summary>
    /// <typeparam name="T">Poco类型</typeparam>
    [DataContract]
    public class PagedListModelReq<T> : Request
    {
        /// <summary>
        /// <strong>Initializes a new instance of the <see cref="</strong>OperationLogReq<strong>" /> class</strong>
        /// OperationLogReq
        /// </summary>
        public PagedListModelReq()
        {
            this.PageIndex = 1;
            this.PageSize = 15;
        }

        /// <summary>
        /// 索引开始
        /// </summary>
        [DataMember]
        public int StartIndex
        {
            get
            {
                int index = 0;
                if (this.PageSize > 0 && this.PageIndex > 0)
                {
                    index = ((this.PageIndex - 1) * this.PageSize) + 1;
                }

                return index;
            }
        }

        /// <summary>
        /// 索引结束
        /// </summary>
        [DataMember]
        public int EndIndex
        {
            get
            {
                int index = 1;
                if (this.PageSize > 0 && this.PageIndex > 0)
                {
                    index = this.PageIndex * this.PageSize;
                }

                return index;
            }
        }

        /// <summary>
        /// 分页大小
        /// </summary>
        [DataMember]
        public int PageSize { get; set; }

        /// <summary>
        /// 第几页数
        /// </summary>
        [DataMember]
        public int PageIndex { get; set; }

        /// <summary>
        /// Called when [deserialized].
        /// </summary>
        /// <param name="context">序列化的上下文</param>
        [OnDeserialized]
        private void OnDeserialized(StreamingContext context)
        {
            if (this.PageIndex <= 0)
            {
                this.PageIndex = 1;
            }

            if (this.PageSize <= 0)
            {
                this.PageSize = 15;
            }
        }
    }

    [Serializable]
    [DataContract]
    public class PagedResult<T> : IPagedResult<T>
    {
        protected PagedResult();
        public PagedResult(IList<T> source, int pageIndex, int pageSize);
        public PagedResult(IQueryable<T> source, int pageIndex, int pageSize);
        public PagedResult(IEnumerable<T> source, int pageIndex, int pageSize, int totalCount);

        [DataMember]
        public bool HasNextPage { get; }
        [DataMember]
        public bool HasPreviousPage { get; }
        [DataMember]
        public IEnumerable<T> Items { get; }
        [DataMember]
        public int PageIndex { get; }
        [DataMember]
        public int PageSize { get; }
        [DataMember]
        public int TotalCount { get; }
        [DataMember]
        public int TotalPages { get; }
    }

/// <summary>
    /// 通用分页返回类
    /// </summary>
    /// <typeparam name="T">Model对应的类型</typeparam>
    [DataContract]
    public class PagedListModelResp<T> : Response
    {
        /// <summary>
        /// 返回分页数据
        /// </summary>
        [DataMember]
        public PagedResult<T> List { get; set; }
    }

转载于:https://www.cnblogs.com/zhshlimi/p/9072918.html