C#中JavaScriptSerializer帮助类用法实例_C#教程

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本文实例讲述了C#中JavaScriptSerializer帮助类用法。分享给大家供大家参考。具体如下:

关键代码如下:
using System;
using System.Collections.Generic;
using System.Text.RegularExpressions;
using System.Web.Script.Serialization;
namespace YanZhiwei.DotNet3._5.Utilities.Common
{
    /// <summary>
    /// JavaScriptSerializer 帮助类
    /// </summary>
    public static class ScriptSerializerHelper
    {
        #region 处理Json字符串的时间格式问题
        /// <summary>
        /// 处理JsonString的时间格式问题
        /// <para>eg:ScriptSerializerHelper.ParseJsonTime(@"[{'getTime':'\/Date(1419564257428)\/'}]", "yyyyMMdd hh:mm:ss");==>[{'getTime':'20141226 11:24:17'}]</para>
        /// <para>参考:http://www.cnphp6.com/archives/35773 </para>
        /// </summary>
        /// <param name="jsonString">Json字符串</param>
        /// <param name="formart">时间格式化类型</param>
        /// <returns>处理好的Json字符串</returns>
        public static string ParseJsonTime(this string jsonString, string formart)
        {
            if (!string.IsNullOrEmpty(jsonString))
            {
                jsonString = Regex.Replace(jsonString, @"\\/Date\((\d+)\)\\/", match =>
                {
                    DateTime _dateTime = new DateTime(1970, 1, 1);
                    _dateTime = _dateTime.AddMilliseconds(long.Parse(match.Groups[1].Value));
                    _dateTime = _dateTime.ToLocalTime();
                    return _dateTime.ToString(formart);
                });
            }
            return jsonString;
        }
        /// <summary>
        /// 处理JsonString的时间格式问题【时间格式:yyyy-MM-dd HH:mm:ss】
        /// <para>参考:http://www.cnphp6.com/archives/35773 </para>
        /// </summary>
        /// <param name="jsonString">Json字符串</param>
        /// <returns>处理好的Json字符串</returns>
        public static string ParseJsonTime(this string jsonString)
        {
            return ParseJsonTime(jsonString, "yyyy-MM-dd HH:mm:ss");
        }
        #endregion
        #region 利用JavaScriptSerializer将对象序列化成JSON
        /// <summary>
        /// 利用JavaScriptSerializer将对象序列化成JSON字符串
        /// <para>eg:ScriptSerializerHelper.Serialize<Person>(_personList);</para>
        /// </summary>
        /// <typeparam name="T">泛型</typeparam>
        /// <param name="entityList">对象集合</param>
        /// <returns>json</returns>
        public static string Serialize<T>(this IEnumerable<T> entityList) where T : class
        {
            string _jsonString = string.Empty;
            if (entityList != null)
            {
                JavaScriptSerializer _serializerHelper = new JavaScriptSerializer();
                _serializerHelper.MaxJsonLength = int.MaxValue;
                _jsonString = _serializerHelper.Serialize(entityList);
            }
            return _jsonString;
        }
        #endregion
        #region 利用JavaScriptSerializer将json字符串反序列化
        /// <summary>
        ///利用JavaScriptSerializer将json字符串反序列化
        /// <para>eg:List<Person> _result = (List<Person>)ScriptSerializerHelper.Deserialize<Person>(_jsonString);</para>
        /// </summary>
        /// <typeparam name="T">泛型</typeparam>
        /// <param name="jsonString"></param>
        /// <returns>IEnumerable</returns>
        public static IEnumerable<T> Deserialize<T>(this string jsonString) where T : class
        {
            IEnumerable<T> _list = null;
            if (!string.IsNullOrEmpty(jsonString))
            {
                JavaScriptSerializer _serializerHelper = new JavaScriptSerializer();
                _list = _serializerHelper.Deserialize<IEnumerable<T>>(jsonString);
            }
            return _list;
        }
        #endregion
    }
}
测试代码如下:
using Microsoft.VisualStudio.TestTools.UnitTesting;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using YanZhiwei.DotNet3._5.UtilitiesTests.Model;
namespace YanZhiwei.DotNet3._5.Utilities.Common.Tests
{
    [TestClass()]
    public class ScriptSerializerHelperTests
    {
        [TestMethod()]
        public void SerializeTest()
        {
            Person _personA = new Person() { Name = "YanZhiweiA", Age = 10, Address = "shanghaiA" };
            Person _personB = new Person() { Name = "YanZhiweiB", Age = 11, Address = "shanghaiB" };
            IList<Person> _personList = new List<Person>();
            _personList.Add(_personA);
            _personList.Add(_personB);
            string _actual = ScriptSerializerHelper.Serialize<Person>(_personList);
            string _expect = "[{\"Name\":\"YanZhiweiA\",\"Age\":10,\"Address\":\"shanghaiA\"},{\"Name\":\"YanZhiweiB\",\"Age\":11,\"Address\":\"shanghaiB\"}]";
            Assert.AreEqual<string>(_expect, _actual);
        }
        [TestMethod()]
        public void DeserializeTest()
        {
            Person _personA = new Person() { Name = "YanZhiweiA", Age = 10, Address = "shanghaiA" };
            Person _personB = new Person() { Name = "YanZhiweiB", Age = 11, Address = "shanghaiB" };
            List<Person> _expected = new List<Person>();
            _expected.Add(_personA);
            _expected.Add(_personB);
            string _jsonString = "[{'Name':'YanZhiweiA','Age':10,'Address':'shanghaiA'},{'Name':'YanZhiweiB','Age':11,'Address':'shanghaiB'}]";
            List<Person> _result = (List<Person>)ScriptSerializerHelper.Deserialize<Person>(_jsonString);
            bool _actual = _expected.SequenceEqual(_result, new PersonCompare());
            Assert.IsTrue(_actual);
        }
        [TestMethod()]
        public void ParseJsonTimeTest()
        {
            string _actual = ScriptSerializerHelper.ParseJsonTime(@"[{'getTime':'\/Date(1419564257428)\/'}]", "yyyyMMdd hh:mm:ss");
            Assert.AreEqual("[{'getTime':'20141226 11:24:17'}]", _actual);
        }
    }
    public class PersonCompare : IEqualityComparer<Person>
    {
        public bool Equals(Person x, Person y)
        {
            return (x.Age == y.Age) && (x.Address == y.Address) && (x.Name == y.Name);
        }
        public int GetHashCode(Person obj)
        {
            return obj.Name.GetHashCode();
        }
    }
}
测试结果如下图所示:

希望本文所述对大家的C#程序设计有所帮助。

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