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DeepCopy and keep your pointer of class not change. Note: for IEnumerable<T> only support Array, IList, IDictionary and can't keep pointer of items.
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| public static class DeepCopyExtension | |
| { | |
| public static T CloneByJson<T>(this T obj, JsonSerializerSettings? jsonSerializerSettings = null) | |
| { | |
| return JsonConvert.DeserializeObject<T>(JsonConvert.SerializeObject(obj, jsonSerializerSettings), jsonSerializerSettings)!; | |
| } | |
| public static object? CloneByJson(this object obj, Type type, JsonSerializerSettings? jsonSerializerSettings = null) | |
| { | |
| return JsonConvert.DeserializeObject(JsonConvert.SerializeObject(obj, jsonSerializerSettings), type, jsonSerializerSettings)!; | |
| } | |
| public static void DeepCopyTo<T>(this T current, T? target, JsonSerializerSettings? jsonSerializerSettings = null) where T : class | |
| { | |
| if (current is null) throw new ArgumentNullException(nameof(current)); | |
| if (target is null) throw new ArgumentNullException(nameof(target)); | |
| current.DeepCopyTo(target, current.GetType(), jsonSerializerSettings); | |
| } | |
| public static void DeepCopyTo(this object current, object target, Type type, JsonSerializerSettings? jsonSerializerSettings = null) | |
| { | |
| if (current is null) throw new ArgumentNullException(nameof(current)); | |
| if (target is null) throw new ArgumentNullException(nameof(target)); | |
| if (type is null) throw new ArgumentNullException(nameof(type)); | |
| if (type.IsValueType || type.IsArray) | |
| throw new InvalidOperationException($"Type '{type.FullName}' can't be enum, struct, array"); | |
| //check type first | |
| void CloneIList(IList current, IList target, JsonSerializerSettings? jsonSerializerSettings = null) | |
| { | |
| target.Clear(); | |
| foreach (var item in current) | |
| { | |
| target.Add(item.CloneByJson(item.GetType(), jsonSerializerSettings)); | |
| } | |
| } | |
| void CloneIDictionary(IDictionary current, IDictionary target, JsonSerializerSettings? jsonSerializerSettings = null) | |
| { | |
| target.Clear(); | |
| foreach (DictionaryEntry pair in (IDictionary)current.CloneByJson(current.GetType(), jsonSerializerSettings)!) | |
| { | |
| target[pair.Key] = pair.Value; | |
| } | |
| } | |
| if (type.IsAssignableTo(typeof(IEnumerable))) | |
| { | |
| if (current is IList list_current && target is IList list_target) | |
| { | |
| CloneIList(list_current, list_target, jsonSerializerSettings); | |
| } | |
| else if (current is IDictionary dict_current && target is IDictionary dict_target) | |
| { | |
| CloneIDictionary(dict_current, dict_target, jsonSerializerSettings); | |
| } | |
| else throw new NotSupportedException(type.FullName); | |
| } | |
| else | |
| { | |
| foreach (PropertyInfo propertyInfo in type.GetProperties().Where(x => x.CanWrite && x.CanRead)) | |
| { | |
| object? f_current = propertyInfo.GetValue(current); | |
| if (f_current is null) | |
| { | |
| propertyInfo.SetValue(target, null); | |
| } | |
| else | |
| { | |
| if (propertyInfo.PropertyType.IsValueType || | |
| propertyInfo.PropertyType.IsEnum || | |
| propertyInfo.PropertyType.Equals(typeof(string)) | |
| )//struct/enum or string | |
| { | |
| propertyInfo.SetValue(target, propertyInfo.GetValue(current)); | |
| } | |
| else if (propertyInfo.PropertyType.IsArray)//array | |
| { | |
| propertyInfo.SetValue(target, f_current.CloneByJson(f_current.GetType(), jsonSerializerSettings)); | |
| } | |
| else if (propertyInfo.PropertyType.IsAssignableTo(typeof(IEnumerable))) | |
| { | |
| object? f_target = propertyInfo.GetValue(target); | |
| if (f_target is null) | |
| { | |
| //just clone | |
| propertyInfo.SetValue(target, f_current.CloneByJson(f_current.GetType(), jsonSerializerSettings)); | |
| } | |
| else | |
| { | |
| if (f_target is IList list_target)//just dont break pointer of List<T> | |
| { | |
| CloneIList((IList)f_current, list_target, jsonSerializerSettings); | |
| } | |
| else if (f_target is IDictionary dict_target)//just dont break pointer of Dictionary<TKey,TValue> | |
| { | |
| CloneIDictionary((IDictionary)f_current, dict_target, jsonSerializerSettings); | |
| } | |
| else throw new NotSupportedException(propertyInfo.PropertyType.FullName); | |
| } | |
| } | |
| else//class | |
| { | |
| var f_target = propertyInfo.GetValue(target); | |
| if (f_target is null) | |
| { | |
| propertyInfo.SetValue(target, f_current.CloneByJson(f_current.GetType(), jsonSerializerSettings)); | |
| } | |
| else | |
| { | |
| f_current.DeepCopyTo(f_target, f_current.GetType()); | |
| } | |
| } | |
| } | |
| } | |
| } | |
| } | |
| } |
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