按照软件设计文档开始重构代码01
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using System.Collections;
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using System.Reflection;
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using DMS.Infrastructure.Entities;
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using DMS.WPF.Models;
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namespace DMS.Extensions;
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public static class ObjectExtensions
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{
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/// <summary>
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/// 复制一个新的对象并返回
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/// </summary>
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/// <param name="source">源对象</param>
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/// <typeparam name="T">新的对象类型</typeparam>
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/// <returns>新的对象</returns>
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public static T CopyTo<T>(this Object source) where T : new()
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{
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T t = new T();
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CopyTo(source, t);
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return t;
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}
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/// <summary>
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/// 将可读写的公共属性值从源对象复制到目标对象。
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/// 属性名称和类型必须匹配,或者它们是具有匹配元素名称的泛型List类型。
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/// 对嵌套对象和列表执行深拷贝。
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/// </summary>
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/// <param name="tsource">源对象。</param>
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/// <param name="ttarget">目标对象。</param>
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public static void CopyTo(this object tsource, object ttarget)
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{
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// 1. 基本的空值检查,提高健壮性
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if (tsource == null)
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{
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// Console.WriteLine("源对象为空。无法复制。");
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throw new ArgumentNullException("源对象为空。无法复制。");
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return;
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}
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if (ttarget == null)
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{
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// Console.WriteLine("目标对象为空。无法复制。");
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throw new ArgumentNullException("目标对象为空。无法复制。");
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return;
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}
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Type sourceType = tsource.GetType();
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Type targetType = ttarget.GetType();
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// 2. 缓存源类型的公共实例属性,避免在循环中重复获取
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PropertyInfo[] sourceProperties = sourceType.GetProperties(BindingFlags.Public | BindingFlags.Instance);
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foreach (PropertyInfo sourceProperty in sourceProperties)
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{
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// 确保源属性可读
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if (!sourceProperty.CanRead)
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{
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continue;
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}
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// 在目标类型中查找对应的属性
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PropertyInfo targetProperty =
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targetType.GetProperty(sourceProperty.Name, BindingFlags.Public | BindingFlags.Instance);
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// 特殊处理 Mqtt.ConnTime 和 DbMqtt.CreateTime 的映射
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if (sourceProperty.Name == "ConnTime" && targetType == typeof(DbMqtt))
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{
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targetProperty = targetType.GetProperty("CreateTime", BindingFlags.Public | BindingFlags.Instance);
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}
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else if (sourceProperty.Name == "CreateTime" && targetType == typeof(Mqtt))
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{
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targetProperty = targetType.GetProperty("ConnTime", BindingFlags.Public | BindingFlags.Instance);
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}
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// 确保目标属性存在且可写
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if (targetProperty != null && targetProperty.CanWrite)
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{
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object sourceValue = sourceProperty.GetValue(tsource);
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// 判断源属性和目标属性是否是泛型列表
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bool isSourceList = sourceProperty.PropertyType.IsGenericType &&
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sourceProperty.PropertyType.GetGenericTypeDefinition() == typeof(List<>);
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bool isTargetList = targetProperty.PropertyType.IsGenericType &&
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targetProperty.PropertyType.GetGenericTypeDefinition() == typeof(List<>);
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// 场景 1: 属性类型完全相同
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if (targetProperty.PropertyType.FullName == sourceProperty.PropertyType.FullName)
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{
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targetProperty.SetValue(ttarget, sourceValue);
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}
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// 场景 2: 属性类型不同,但可能是泛型 List<T> 类型
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else if (isTargetList && isSourceList)
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{
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// 特殊处理 Mqtts 列表的复制
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if (sourceProperty.Name == "Mqtts")
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{
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if (sourceType == typeof(Variable) && targetType == typeof(DbVariable))
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{
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// 从 Variable (List<Mqtt>) 转换为 DbVariable (List<DbMqtt>)
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var sourceMqtts = sourceValue as List<Mqtt>;
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if (sourceMqtts != null)
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{
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var targetMqtts = sourceMqtts.Select(m => m.CopyTo<DbMqtt>()).ToList();
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targetProperty.SetValue(ttarget, targetMqtts);
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}
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else
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{
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targetProperty.SetValue(ttarget, null);
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}
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}
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else if (sourceType == typeof(DbVariable) && targetType == typeof(Variable))
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{
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// 从 DbVariable (List<DbMqtt>) 转换为 Variable (List<Mqtt>)
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var sourceDbMqtts = sourceValue as List<DbMqtt>;
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if (sourceDbMqtts != null)
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{
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var targetMqtts = sourceDbMqtts.Select(m => m.CopyTo<Mqtt>()).ToList();
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targetProperty.SetValue(ttarget, targetMqtts);
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}
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else
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{
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targetProperty.SetValue(ttarget, null);
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}
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}
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else
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{
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// 其他 List<T> 类型,使用通用复制逻辑
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CopyGenericList(ttarget, sourceProperty, targetProperty, sourceValue);
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}
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}
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else
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{
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// 其他 List<T> 类型,使用通用复制逻辑
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CopyGenericList(ttarget, sourceProperty, targetProperty, sourceValue);
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}
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}
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// 场景 3: 属性类型不同,但是属性名称一样
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else
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{
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var sObj = sourceProperty.GetValue(tsource);
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if (sObj == null)
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{
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continue;
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}
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var tObj = targetProperty.GetValue(ttarget);
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if (tObj == null)
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{
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tObj=Activator.CreateInstance(targetProperty.PropertyType);
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}
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if (sObj!=null && tObj!=null)
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{
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CopyTo(sObj,tObj);
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targetProperty.SetValue(ttarget,tObj);
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}
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}
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}
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}
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}
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/// <summary>
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/// 复制泛型列表,
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/// </summary>
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/// <param name="ttarget"></param>
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/// <param name="sourceProperty"></param>
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/// <param name="targetProperty"></param>
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/// <param name="sourceValue"></param>
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private static void CopyGenericList(object ttarget, PropertyInfo sourceProperty, PropertyInfo targetProperty,
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object? sourceValue)
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{
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// 获取源列表的元素类型
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Type sourceListItemType = sourceProperty.PropertyType.GetGenericArguments()[0];
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// 获取目标列表的元素类型
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Type targetListItemType = targetProperty.PropertyType.GetGenericArguments()[0];
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// 检查列表元素类型名称是否匹配(用于潜在的深拷贝)
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if (sourceProperty.Name == targetProperty.Name)
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{
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// 如果源列表为空,则将目标属性设置为 null
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if (sourceValue == null)
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{
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targetProperty.SetValue(ttarget, null);
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return;
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}
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// 将源值强制转换为 IEnumerable 以便遍历
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var sourceList = (IEnumerable)sourceValue;
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// 创建一个目标泛型列表的新实例
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// 假设 CreateGenericList 助手方法可用,或按注释创建
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// var targetList = (IList)Activator.CreateInstance(typeof(List<>).MakeGenericType(targetListItemType));
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IList targetList = CreateGenericList(targetListItemType);
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foreach (var item in sourceList)
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{
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// 确保列表项不为空,然后尝试深拷贝
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if (item == null)
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{
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// 如果源列表项为 null,则直接添加到目标列表
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targetList.Add(null);
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continue;
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}
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// 创建目标列表元素类型的一个实例
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var targetDataItem = Activator.CreateInstance(targetListItemType);
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// 递归调用 CopyTo,对嵌套对象进行深拷贝
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CopyTo(item, targetDataItem);
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// 将复制后的项添加到目标列表
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targetList.Add(targetDataItem);
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}
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// 将填充好的目标列表设置给目标对象的属性
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targetProperty.SetValue(ttarget, targetList);
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}
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else
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{
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// 列表类型匹配,但元素类型名称不匹配。此处跳过,或可实现更复杂的转换。
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Console.WriteLine(
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$"由于列表元素类型不匹配,跳过属性 '{sourceProperty.Name}':源 '{sourceListItemType.Name}',目标 '{targetListItemType.Name}'");
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}
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}
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/// <summary>
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/// 辅助方法,用于动态创建泛型 List<T>。
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/// </summary>
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/// <param name="itemType">列表应包含的元素类型。</param>
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/// <returns>List<itemType> 的 IList 实例。</returns>
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private static IList CreateGenericList(Type itemType)
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{
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Type listType = typeof(List<>).MakeGenericType(itemType);
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return (IList)Activator.CreateInstance(listType);
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}
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}
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