Wms_WebApi/NXWMS.WebApi/NXWMS.Util/Extends/EntityExtensions.cs

using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;
using System.Text;
using System.Threading.Tasks;
using System.Xml.Serialization;

namespace NXWMS.Code.Extends
{
    /// <summary>
    /// 实体扩展
    /// </summary>
    public static class EntityExtensions
    {
        #region 实体名称
        /// <summary>
        /// 实体名称
        /// </summary>
        /// <param name="operationStatusInfo"></param>
        /// <returns></returns>
        public static string GetName<T>(this T entity)
        {
            return typeof(T).Name;
        }
        #endregion

        #region 实体克隆
        /// <summary>
        /// 单一实体克隆
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="obj"></param>
        /// <returns></returns>
        public static T Clone<T>(this T obj)
        {
            object retval;
            using (MemoryStream ms = new MemoryStream())
            {
                XmlSerializer xml = new XmlSerializer(typeof(T));
                xml.Serialize(ms, obj);
                ms.Seek(0, SeekOrigin.Begin);
                retval = xml.Deserialize(ms);
                ms.Close();
            }
            return (T)retval;
        }

        /// <summary>
        /// 反射克隆
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="list"></param>
        /// <returns></returns>
        public static List<T> CloneReflect<T>(this List<T> list) where T : new()
        {
            List<T> items = new List<T>();
            foreach (var m in list)
            {
                var model = new T();
                var ps = model.GetType().GetProperties();
                var properties = m.GetType().GetProperties();
                foreach (var p in properties)
                {
                    foreach (var pm in ps)
                    {
                        if (pm.Name == p.Name)
                        {
                            pm.SetValue(model, p.GetValue(m, null), null);
                        }
                    }
                }
                items.Add(model);
            }
            return items;
        }

        /// <summary>
        /// Newtonsoft克隆
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="list"></param>
        /// <returns></returns>
        public static List<T> CloneNewtonsoft<T>(this List<T> list) where T : new()
        {
            var str = JsonConvert.SerializeObject(list);
            return JsonConvert.DeserializeObject<List<T>>(str);
        }

        /// <summary>
        /// BinaryFormatter克隆
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="list"></param>
        /// <returns></returns>
        public static List<T> CloneBinaryFormatter<T>(this List<T> list)
        {
            using (Stream objectStream = new MemoryStream())
            {
                IFormatter formatter = new BinaryFormatter();
                formatter.Serialize(objectStream, list);
                objectStream.Seek(0, SeekOrigin.Begin);
                return (List<T>)formatter.Deserialize(objectStream);
            }
        }

        #endregion

        #region 实体拷贝
        /// <summary>
        /// 反射实现两个类的对象之间相同属性的值的复制 适用于初始化新实体
        /// </summary>
        /// <typeparam name="D">返回的实体</typeparam>
        /// <typeparam name="S">数据源实体</typeparam>
        /// <param name="s">数据源实体</param>
        /// <returns>返回的新实体</returns>
        public static TResult Mapper<TResult, TEntity>(this TEntity source)
        {
            var d = Activator.CreateInstance<TResult>();
            try
            {
                var Types = source.GetType();
                var Typed = typeof(TResult);
                foreach (PropertyInfo sp in Types.GetProperties())
                {
                    foreach (PropertyInfo dp in Typed.GetProperties())
                    {
                        if (dp.Name == sp.Name && dp.PropertyType == sp.PropertyType && dp.Name != "Error" && dp.Name != "Item")
                        {
                            dp.SetValue(d, sp.GetValue(source, null), null);
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                throw ex;
            }
            return d;
        }

        /// <summary> 
        /// 反射实现两个类的对象之间相同属性的值的复制  适用于没有新建实体之间
        /// </summary>
        /// <typeparam name="D">返回的实体</typeparam>
        /// <typeparam name="S">数据源实体</typeparam>
        /// <param name="d">返回的实体</param>
        /// <param name="s">数据源实体</param>
        /// <returns></returns>
        public static TResult MapperToModel<TResult, TEntity>(this TResult result, TEntity source)
        {
            try
            {
                var Types = source.GetType();
                var Typed = typeof(TResult);
                foreach (PropertyInfo sp in Types.GetProperties())
                {
                    foreach (PropertyInfo dp in Typed.GetProperties())
                    {
                        if (dp.Name == sp.Name && dp.PropertyType == sp.PropertyType)
                        {
                            dp.SetValue(result, sp.GetValue(source, null), null);
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                throw ex;
            }
            return result;
        }

        /// <summary>
        /// 反射实现实体类清空属性值,适用与批量更新数据,只更新部分字段
        /// </summary>
        /// <typeparam name="TEntity"></typeparam>
        /// <param name="source"></param>
        /// <param name="fieldName"></param>
        /// <returns></returns>
        public static List<TEntity> SetEmpty<TEntity>(this List<TEntity> source,string[] fieldNames) where TEntity : class
        {
            try
            {
                foreach(var item in source)
                {
                    var Types = item.GetType();
                    foreach (PropertyInfo dp in Types.GetProperties())
                    {
                        if (!fieldNames.Where(s=>s.ToLower() == dp.Name.ToLower()).Any())
                        {
                            dp.SetValue(item, null, null);
                        }
                    }
                }
                return source;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// 追加实体对象
        /// </summary>
        /// <typeparam name="TEntity"></typeparam>
        /// <param name="source"></param>
        /// <param name="entity"></param>
        /// <returns></returns>
        public static List<TEntity> AddGet<TEntity>(this List<TEntity> source,TEntity entity) where TEntity : class
        {
            source.Add(entity);
            return source;
        } 

        #endregion
    }
}