关于DataTable序列化的事儿

Posted 2020-11-02 吃饭睡觉敲代码

今天写了一个小demo，从数据库中读取到了dataTable，想序列化成json字符串，然后传到前端，进行页面展示，其实很简单的一个步骤，谁知道它出错了！！！

出错的原因是：序列化类型为XX的对象时检测到循环引用，然后百度了一下，有好多解决方案，我没有一一去试，写这个主要记录一下我找到的解决的办法。

链接：http://xuzhihong1987.blog.163.com/blog/static/26731587201101913722238/

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Web.Script.Serialization;

namespace Common
{
    public class ConventDataTableToJson
    {
        /// <summary>

        /// 序列化方法（带分页）

        /// </summary>

        /// <param name="dt"></param>

        /// <returns></returns>

        public static string Serialize(DataTable dt)
        {

            List<Dictionary<string, object>> list = new List<Dictionary<string, object>>();

            foreach (DataRow dr in dt.Rows)
            {

                Dictionary<string, object> result = new Dictionary<string, object>();

                foreach (DataColumn dc in dt.Columns)
                {

                    result.Add(dc.ColumnName, dr[dc].ToString());

                }

                list.Add(result);

            }

            int count = 0;

            try
            {

                count = Convert.ToInt32(dt.TableName);

            }

            catch (System.Exception ex)
            {

                count = dt.Rows.Count;

            }

            string strReturn = "";

            if (count == 0)
            {

                strReturn = "{\"totalCount\":0,\"data\":[]}";

            }

            else
            {

                strReturn = ConventToJson(list, count);

            }

            return strReturn;

        }



        /// <summary>

        /// 转换为JSON对象

        /// </summary>

        /// <returns></returns>

        public static string ConventToJson<T>(List<T> list, int count)
        {

            javascriptSerializer serializer = new JavaScriptSerializer();

            string strJson = serializer.Serialize(list);

            strJson = strJson.Substring(1);

            strJson = strJson.Insert(0, "{totalCount:" + count + ",data:[");

            strJson += "}";



            return strJson;

        }



        /// <summary>

        /// 不需要分页

        /// </summary>

        /// <param name="dt"></param>

        /// <param name="flag">false</param>

        /// <returns></returns>

        public static string Serialize(DataTable dt, bool flag)
        {

            JavaScriptSerializer serializer = new JavaScriptSerializer();

            List<Dictionary<string, object>> list = new List<Dictionary<string, object>>();

            foreach (DataRow dr in dt.Rows)
            {

                Dictionary<string, object> result = new Dictionary<string, object>();

                foreach (DataColumn dc in dt.Columns)
                {

                    result.Add(dc.ColumnName, dr[dc].ToString());

                }

                list.Add(result);

            }

            return serializer.Serialize(list); ;

        }
    }
}