c# 复制对象

 

 

 

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#region 复制对象     #region MyRegion private static Dictionary<string, object> _Dic = new Dictionary<string, object>();   public static TOut TransExp<TIn, TOut>(TIn tIn) {     string key = string.Format("trans_exp_{0}_{1}", typeof(TIn).FullName, typeof(TOut).FullName);     if (!_Dic.ContainsKey(key))     {         ParameterExpression parameterExpression = Expression.Parameter(typeof(TIn), "p");         List<MemberBinding> memberBindingList = new List<MemberBinding>();           foreach (var item in typeof(TOut).GetProperties())         {             if (!item.CanWrite) continue;             MemberExpression property = Expression.Property(parameterExpression, typeof(TIn).GetProperty(item.Name));             MemberBinding memberBinding = Expression.Bind(item, property);             memberBindingList.Add(memberBinding);         }           MemberInitExpression memberInitExpression = Expression.MemberInit(Expression.New(typeof(TOut)), memberBindingList.ToArray());         Expression<Func<TIn, TOut>> lambda = Expression.Lambda<Func<TIn, TOut>>(memberInitExpression, new ParameterExpression[] { parameterExpression });         Func<TIn, TOut> func = lambda.Compile();           _Dic[key] = func;     }     return ((Func<TIn, TOut>)_Dic[key])(tIn); }   #endregion   /// <summary> /// 将一个对象的属性给另一个对象的相同属性赋值 /// </summary> /// <typeparam name="S">源对象类型</typeparam> /// <typeparam name="T">目标对象类型</typeparam> /// <param name="s">源对象</param> /// <param name="t">目标对</param> public static void AutoMapping<S, T>(S s, T t) {     try     {             #region 【方法1】历史使用方法，在2022年2月8日11:45:39停止使用，使用方法2             //if (s == null)         //{         //    s = default;         //    return;         //}         //if (t == null)         //{         //    t = default;         //    return;           //}         //PropertyInfo[] pps = GetPropertyInfos(s.GetType());         //Type target = typeof(T);         //foreach (var pp in pps)         //{         //    PropertyInfo targetPP = target.GetProperty(pp.Name);         //    object value = pp.GetValue(s, null);           //    if (targetPP != null && value != null)         //    {         //        try         //        {         //            targetPP.SetValue(t, value, null);         //        }         //        catch (Exception)         //        {           //        }           //    }         //}           #endregion           #region 【方法2】，2022-2-8 11:46:40开始启用           t = Com.Domain.Common.DataConvert.TransExp<S, T>(s);           #endregion       }     catch (Exception)     {       } }   /// <summary> /// 获取Service层的类实例,在没有写配置文件时使用 /// </summary> /// <typeparam name="T">当前传入的类名</typeparam> /// <returns>类实体</returns> public static T CreateInstance<T>() where T : new() {     return new T(); }       public static PropertyInfo[] GetPropertyInfos(Type type) {     return type.GetProperties(BindingFlags.Public | BindingFlags.Instance); }     #endregion