反射+序列化+泛型=变更记录实例

变更记录，是通过变更前是实体和变更后的实体进行比较后，如有变更记录，就记录到变更表里面。
1、序列化实体：
1）需要在.net framework 4.0：右击MODel层选择属性。

2）添加引用：

3)实体类代码设置：

注意： [Display(Name = “人员ID”)]是为了记录变更字段的中文名称。
2，核心代码两个实体进行比较，用泛型实体记录变更的每个字段，然后保存到变更表。：

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Reflection;using System.ComponentModel.DataAnnotations;namespace Tlw.zjxypj.Common{    public static class ChangeRecordUnity    {        /// <summary>        /// 获取修改后的model,获取现在的model,对比model，获得差异        /// </summary>        /// <param name="modelAfter"></param>        /// <param name="modelBefore"></param>        /// <remarks>比对必须是相同的实体类</remarks>        public static List<ChangeInfo> getChanges(object modelAfter, object modelBefore)        {            List<ChangeInfo> lisChangeInfos = new List<ChangeInfo>();            Type t = modelAfter.GetType();            PropertyInfo[] pInfoArr = t.GetProperties();            //Dictionary<string, string> dicChangeList = new Dictionary<string, string>();            foreach (PropertyInfo pi in pInfoArr)  //遍历值            {                object objAfter = pi.GetValue(modelAfter, null);//修改后值                object objBefore = pi.GetValue(modelBefore, null);//修改前值                string pValueAfter = objAfter != null ? objAfter.ToString().Trim() : "";//修改后值                string pValueBefore = objBefore != null ? objBefore.ToString().Trim() : "";//修改前值                if (pValueAfter != pValueBefore)  //比对                {                    //获取修改信息                    string aliasName = "";                    object[] pAttribute = pi.GetCustomAttributes(typeof(DisplayAttribute), false);                    if (pAttribute.Count() > 0)                    {                        aliasName = ((DisplayAttribute)pAttribute[0]).Name;                    }                    //dicChangeList.Add(pi.Name,string.Format("{0} 从'{1}'更改为'{2}'",string.IsNullOrEmpty(aliasName)?pi.Name:aliasName,pValueBefore,pValueAfter));                    ChangeInfo pChangeInfo = new ChangeInfo();                    pChangeInfo.ColumnName = pi.Name;                    pChangeInfo.ColumnAliasName = string.IsNullOrEmpty(aliasName) ? pi.Name : aliasName;//变更小类:具体字段的中文名称                    pChangeInfo.AfterValue = pValueAfter;                    pChangeInfo.BeforeValue = pValueBefore;                    lisChangeInfos.Add(pChangeInfo);                }            }            //return dicChangeList;            return lisChangeInfos;        }    }    /// <summary>    /// 变更信息    /// </summary>    public class ChangeInfo    {        /// <summary>        /// 变更字段        /// </summary>        //        //变更小类:具体字段名称        public string ColumnName { get; set; }        //变更小类:具体字段的中文名称        public string ColumnAliasName { get; set; }        //变更后        public string AfterValue { get; set; }        //变更前        public string BeforeValue { get; set; }    }   }

3、调用：

//获取详细改变信息                List<ChangeInfo> lisChangeInfos = ChangeRecordUnity.getChanges(model, modelBefore);                if (lisChangeInfos.Count > 0)                {                    for (int i = 0; i < lisChangeInfos.Count; i++)                    {                        zjbaksys.Model.CHANGELOG pModel = new zjbaksys.Model.CHANGELOG();                        pModel.ID = DbHelperOra.GetSEQ("SEQ_CHANGELOG");                        pModel.APPCHECKID = decimal.Parse(pCheckid);                        pModel.ENTERPRISEID = ENTERPRISEID;                        pModel.TYPE = "技术负责人信息";                        pModel.SUBTYPE = lisChangeInfos[i].ColumnName;                        pModel.SUBALIASNAME = lisChangeInfos[i].ColumnAliasName;                        pModel.AFTERVALUE = lisChangeInfos[i].AfterValue;                        pModel.BEFOREVALUE = lisChangeInfos[i].BeforeValue;                        pModel.OPERATION = "修改";                        pModel.UNIQUENAME = modelBefore.PERSONNAME.Trim();                        pModel.SUBMITTIME = System.DateTime.Now;                        listLog.Add(pModel);                    }                }

4、变更记录表：