C# 两个Object比较

C#两个Object进行比较，Object里只是简单属性，不存在层级关系还比较好处理，如果遇到多层级的就有点麻烦。

1、简单Object比较

        /// <summary>        /// 比较字段        /// </summary>        /// <param name="beforeUpdateData">原来的值</param>        /// <param name="afterUpdateData">页面提交的新值</param>        /// <param name="specialFields">特殊处理字段</param>        /// <param name="ignoreFields">忽略处理字段</param>        /// <returns></returns>        public static List<FieldItem> ComparisonField(Object beforeUpdateData,Object afterUpdateData,List<string> specialFields,List<string> ignoreFields)        {            var fieldItems = new List<FieldItem>();            if (null == afterUpdateData || null == beforeUpdateData) return fieldItems;            Type type = afterUpdateData.GetType();            var fields = type.GetPRoperties(System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.Public);            foreach (var field in fields)            {// 取得字段的值                object afterUpdateItem = field.GetValue(afterUpdateData);                var beforeUpdateItem = beforeUpdateData.GetType().GetProperty(field.Name).GetValue(beforeUpdateData, null);　　　　　　　　　　if (field.PropertyType.IsValueType || field.PropertyType.Name.StartsWith("String"))                {                    // String类型处理                    // 直接比较是否相等，若不相等直接记录                    if (afterUpdateItem.ToString() != beforeUpdateItem.ToString())                    {                        fieldItems.Add(new FieldItem                                {                                    ChangeField = field.Name,                                    BeforeChangeContent = beforeUpdateItem.ToString(),                                    AfterChangeContent = afterUpdateItem.ToString(),                                    Description = "修改"                                });                    }                }            }　　　　　　 return fieldItems;        }

2、复杂Object比较

对比product 与 newProduct 两个Object，以下是修改项：

1. 修改Name：小米Note -> 小米Note2
2. 修改Detail中的Price：2299 -> 3399
3. 修改耳机价格：79 -> 89
4. 产品子项新增了米兔

    class Program    {        static void Main(string[] args)        {            var earphoneID = Guid.NewGuid();            var rabbit = new ProductSubitem() { ID = Guid.NewGuid(), Name = "米兔", Detail = new Detail() { ID = Guid.NewGuid(), Introduce = "小米米兔", Price = 10 } };            var subitem1 = new ProductSubitem() { ID = earphoneID, Name = "耳机", Detail = new Detail() { ID = Guid.NewGuid(), Introduce = "小米耳机", Price = 79 } };            var subitem11 = new ProductSubitem() { ID = earphoneID, Name = "耳机", Detail = new Detail() { ID = Guid.NewGuid(), Introduce = "小米耳机", Price = 89 } };            var subitem2 = new ProductSubitem() { ID = Guid.NewGuid(), Name = "手机贴膜", Detail = new Detail() { ID = Guid.NewGuid(), Introduce = "小米手机贴膜", Price = 5 } };            // 构建产品原始数据            var beijing = new Province { ID = Guid.NewGuid(), Name = "北京" };            var mifan1 = new User() { ID = Guid.NewGuid(), UserName = "mifan1", RealName = "北京米粉" };            var attachmentFiles = new List<AttachmentFile>()                                      {                                          new AttachmentFile(){ID = Guid.NewGuid(),Name = "说明书",SavePath = @"/xiaomi/document/note.doc",Size = 20}                                      };            var id = Guid.NewGuid();            var detailID = Guid.NewGuid();            var product = new Product()                              {                                  ID = id,                                  Name = "小米Note",                                  Detail = new Detail() { ID = detailID, Introduce = "小米新款手机", Price = 2299 },                                  Province = beijing,                                  CreateUser = mifan1,                                  CreateTime = DateTime.Now,                                  ProductSubitems = new List<ProductSubitem>() { subitem1, subitem2 },                                  AttachmentFiles = attachmentFiles                              };            var newProduct = new Product()            {                ID = id,                Name = "小米Note2", // 1.修改了Name：小米Note -> 小米Note2                Detail = new Detail() { ID = detailID, Introduce = "小米新款手机", Price = 3399 }, // 2.修改了Detail中的Price：2299 -> 3399                Province = beijing,                CreateUser = mifan1,                CreateTime = DateTime.Now,                ProductSubitems = new List<ProductSubitem>() { rabbit, subitem11, subitem2 }, // 3.修改耳机价格：79 -> 89 | 4.产品子项新增了米兔。                AttachmentFiles = attachmentFiles            };            var comparisonFieldList = Common.ComparisonField(product, newProduct, SpecialFields, IgnoreFields);            foreach (var fieldItem in comparisonFieldList)            {                Console.WriteLine(string.Format("变更字段:{0}, 修改前内容:{1}, 修改后内容:{2}, 描述:{3}", fieldItem.ChangeField, fieldItem.BeforeChangeContent, fieldItem.AfterChangeContent,fieldItem.Description));            }            Console.ReadLine();        }        /// <summary>        /// 特殊字段，只做ID比较        /// </summary>        public static readonly List<string> SpecialFields = new List<string>()        {            "Province","AttachmentFiles"        };        /// <summary>        /// 忽略字段        /// </summary>        public static readonly List<string> IgnoreFields = new List<string>()        {            "ID",            "CreateTime",            "CreateUser"        };

多层级实体：

  1         /// <summary>  2         /// 产品  3         /// </summary>  4         public class Product  5         {  6             public Guid ID { get; set; }  7   8             /// <summary>  9             /// 名称 10             /// </summary> 11             public string Name { get; set; } 12  13             /// <summary> 14             /// 详情 15             /// </summary> 16             public Detail Detail { get; set; } 17  18             /// <summary> 19             /// 产地 20             /// </summary> 21             public Province Province { get; set; } 22  23             /// <summary> 24             /// 创建用户 25             /// </summary> 26             public User CreateUser { get; set; } 27  28             public DateTime CreateTime { get; set; } 29  30             /// <summary> 31             /// 产品子项 32             /// </summary> 33             public List<ProductSubitem> ProductSubitems { get; set; } 34  35             /// <summary> 36             /// 相关文件 37             /// </summary> 38             public List<AttachmentFile> AttachmentFiles { get; set; } 39         } 40  41         /// <summary> 42         /// 用户 43         /// </summary> 44         public class User 45         { 46             public Guid ID { get; set; } 47  48             public string UserName { get; set; } 49  50             public string RealName { get; set; } 51         } 52  53         /// <summary> 54         /// 省份 55         /// </summary> 56         public class Province 57         { 58             public Guid ID { get; set; } 59  60             public string Name { get; set; } 61         } 62  63         /// <summary> 64         /// 介绍 65         /// </summary> 66         public class Detail 67         { 68             public Guid ID { get; set; } 69  70             /// <summary> 71             /// 介绍 72             /// </su