通用类 Utility

最新推荐文章于 2025-05-03 14:25:20 发布

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最新推荐文章于 2025-05-03 14:25:20 发布

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文章标签： json

原文链接：http://www.cnblogs.com/acyy/archive/2012/08/29/2662261.html

本文介绍如何使用C#实现DataTable数据翻页与序列化功能，包括获取指定页的数据和将数据实体转换为JSON字符串。

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/// <summary>
    /// 常用方法
    /// </summary>
    public static class Utility
    {
        /// <summary>
        /// DataTable翻页
        /// </summary>
        /// <param name="pageIndex">页序号</param>
        /// <param name="pageSize">每页显示数量</param>
        /// <param name="recordCount">总记录数</param>
        /// <param name="dt">要翻页浏览的DataTable</param>
        /// <returns></returns>
        public static DataTable GetPage(int pageIndex, int pageSize, out int recordCount, DataTable dt)
        {
            recordCount = 0;
            if(dt == null)
                return null;

            recordCount = dt.Rows.Count;

            if(pageIndex == 0)
                pageIndex = 1;

            DataTable newdt = dt.Clone();

            int rowBegin = (pageIndex - 1) * pageSize;
            int rowEnd = pageIndex * pageSize;

            if(rowBegin >= dt.Rows.Count)
                return newdt;

            if(rowEnd > dt.Rows.Count)
                rowEnd = dt.Rows.Count;
            for(int i = rowBegin; i <= rowEnd - 1; i++)
            {
                newdt.ImportRow(dt.Rows[i]);
            }
            dt.Dispose();
            return newdt;
        }

        /// <summary>
        /// 将数据实体序列化，返回序列化后的字符
        /// </summary>
        /// <param name="model">要序列化的数据实体</param>
        /// <returns></returns>
        public static string Serialize<TSource>(TSource model)
        {
            JavaScriptSerializer serializer = new JavaScriptSerializer();
            return serializer.Serialize(model);
        }
          

        /// <summary>
        /// Json反序列化,用于接收客户端Json后生成对应的对象
        /// </summary>
        /// <typeparam name="T">对象类型</typeparam>
        /// <param name="json">Json字符串</param>
        /// <returns>Json后生成对应的对象</returns>
        public static T Deserialize<T>(this string json)
        {
            if (json != null && json.Trim() != string.Empty)
            {
                JavaScriptSerializer serializer = new JavaScriptSerializer();
                return serializer.Deserialize<T>(json);
            }
            return default(T);
        }
    }

转载于:https://www.cnblogs.com/acyy/archive/2012/08/29/2662261.html