修改了CopyTo方法,使用反射可以将列表的内容也可以复制
This commit is contained in:
@@ -1,53 +1,161 @@
|
||||
namespace PMSWPF.Extensions;
|
||||
using System.Collections;
|
||||
using System.Reflection;
|
||||
|
||||
namespace PMSWPF.Extensions;
|
||||
|
||||
public static class ObjectExtensions
|
||||
{
|
||||
|
||||
/// <summary>
|
||||
/// 对象转换,将source对象上的所有属性的值,都转换到target对象上
|
||||
/// 复制一个新的对象并返回
|
||||
/// </summary>
|
||||
/// <param name="source"></param>
|
||||
/// <param name="target"></param>
|
||||
/// <typeparam name="T"></typeparam>
|
||||
public static void CopyTo<T>(this object source, T target)
|
||||
/// <param name="source">源对象</param>
|
||||
/// <typeparam name="T">新的对象类型</typeparam>
|
||||
/// <returns>新的对象</returns>
|
||||
public static T CopyTo<T>(this Object source) where T : new()
|
||||
{
|
||||
var sourceType = source.GetType();
|
||||
var targetType = target.GetType();
|
||||
var sourceProperties = sourceType.GetProperties();
|
||||
foreach (var sourceProperty in sourceProperties)
|
||||
T t = new T();
|
||||
CopyTo(source, t);
|
||||
return t;
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// 将可读写的公共属性值从源对象复制到目标对象。
|
||||
/// 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。
|
||||
/// 对嵌套对象和列表执行深拷贝。
|
||||
/// </summary>
|
||||
/// <param name="tsource">源对象。</param>
|
||||
/// <param name="ttarget">目标对象。</param>
|
||||
public static void CopyTo(this object tsource, object ttarget)
|
||||
{
|
||||
// 1. 基本的空值检查,提高健壮性
|
||||
if (tsource == null)
|
||||
{
|
||||
var targetProperty = targetType.GetProperty(sourceProperty.Name);
|
||||
if (targetProperty != null && targetProperty.CanWrite && sourceProperty.CanRead &&
|
||||
targetProperty.PropertyType == sourceProperty.PropertyType)
|
||||
// Console.WriteLine("源对象为空。无法复制。");
|
||||
throw new ArgumentNullException("源对象为空。无法复制。");
|
||||
return;
|
||||
}
|
||||
|
||||
if (ttarget == null)
|
||||
{
|
||||
// Console.WriteLine("目标对象为空。无法复制。");
|
||||
throw new ArgumentNullException("目标对象为空。无法复制。");
|
||||
return;
|
||||
}
|
||||
|
||||
Type sourceType = tsource.GetType();
|
||||
Type targetType = ttarget.GetType();
|
||||
|
||||
// 2. 缓存源类型的公共实例属性,避免在循环中重复获取
|
||||
PropertyInfo[] sourceProperties = sourceType.GetProperties(BindingFlags.Public | BindingFlags.Instance);
|
||||
|
||||
foreach (PropertyInfo sourceProperty in sourceProperties)
|
||||
{
|
||||
// 确保源属性可读
|
||||
if (!sourceProperty.CanRead)
|
||||
{
|
||||
var value = sourceProperty.GetValue(source, null);
|
||||
targetProperty.SetValue(target, value, null);
|
||||
continue;
|
||||
}
|
||||
|
||||
// 在目标类型中查找对应的属性
|
||||
PropertyInfo targetProperty =
|
||||
targetType.GetProperty(sourceProperty.Name, BindingFlags.Public | BindingFlags.Instance);
|
||||
|
||||
// 确保目标属性存在且可写
|
||||
if (targetProperty != null && targetProperty.CanWrite)
|
||||
{
|
||||
object sourceValue = sourceProperty.GetValue(tsource);
|
||||
|
||||
// 场景 1: 属性类型完全相同
|
||||
if (targetProperty.PropertyType == sourceProperty.PropertyType)
|
||||
{
|
||||
targetProperty.SetValue(ttarget, sourceValue);
|
||||
}
|
||||
// 场景 2: 属性类型不同,但可能是泛型 List<T> 类型
|
||||
else
|
||||
{
|
||||
bool isSourceList = sourceProperty.PropertyType.IsGenericType &&
|
||||
sourceProperty.PropertyType.GetGenericTypeDefinition() == typeof(List<>);
|
||||
bool isTargetList = targetProperty.PropertyType.IsGenericType &&
|
||||
targetProperty.PropertyType.GetGenericTypeDefinition() == typeof(List<>);
|
||||
|
||||
if (isSourceList && isTargetList)
|
||||
{
|
||||
// 获取源列表的元素类型
|
||||
Type sourceListItemType = sourceProperty.PropertyType.GetGenericArguments()[0];
|
||||
// 获取目标列表的元素类型
|
||||
Type targetListItemType = targetProperty.PropertyType.GetGenericArguments()[0];
|
||||
|
||||
// 检查列表元素类型名称是否匹配(用于潜在的深拷贝)
|
||||
if (sourceProperty.Name == targetProperty.Name)
|
||||
{
|
||||
// 如果源列表为空,则将目标属性设置为 null
|
||||
if (sourceValue == null)
|
||||
{
|
||||
targetProperty.SetValue(ttarget, null);
|
||||
continue;
|
||||
}
|
||||
|
||||
// 将源值强制转换为 IEnumerable 以便遍历
|
||||
var sourceList = (IEnumerable)sourceValue;
|
||||
|
||||
// 创建一个目标泛型列表的新实例
|
||||
// 假设 CreateGenericList 助手方法可用,或按注释创建
|
||||
// var targetList = (IList)Activator.CreateInstance(typeof(List<>).MakeGenericType(targetListItemType));
|
||||
IList targetList = CreateGenericList(targetListItemType);
|
||||
|
||||
foreach (var item in sourceList)
|
||||
{
|
||||
// 确保列表项不为空,然后尝试深拷贝
|
||||
if (item == null)
|
||||
{
|
||||
// 如果源列表项为 null,则直接添加到目标列表
|
||||
targetList.Add(null);
|
||||
continue;
|
||||
}
|
||||
|
||||
// 创建目标列表元素类型的一个实例
|
||||
var targetDataItem = Activator.CreateInstance(targetListItemType);
|
||||
|
||||
// 递归调用 CopyTo,对嵌套对象进行深拷贝
|
||||
CopyTo(item, targetDataItem);
|
||||
|
||||
// 将复制后的项添加到目标列表
|
||||
targetList.Add(targetDataItem);
|
||||
}
|
||||
|
||||
// 将填充好的目标列表设置给目标对象的属性
|
||||
targetProperty.SetValue(ttarget, targetList);
|
||||
}
|
||||
else
|
||||
{
|
||||
// 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。
|
||||
Console.WriteLine(
|
||||
$"由于列表元素类型不匹配,跳过属性 '{sourceProperty.Name}':源 '{sourceListItemType.Name}',目标 '{targetListItemType.Name}'");
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
// 类型不同,且都不是泛型 List<T>。此处跳过,或可实现类型转换。
|
||||
Console.WriteLine(
|
||||
$"由于类型不匹配,跳过属性 '{sourceProperty.Name}':源 '{sourceProperty.PropertyType.Name}',目标 '{targetProperty.PropertyType.Name}'");
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// <summary>
|
||||
/// 创建一个泛型对象,将source对象上的所有属性的值,都转换到新创建对象上
|
||||
/// 辅助方法,用于动态创建泛型 List<T>。
|
||||
/// </summary>
|
||||
/// <param name="source"></param>
|
||||
/// <param name="target"></param>
|
||||
/// <typeparam name="T"></typeparam>
|
||||
public static T NewTo<T>(this object source) where T : new()
|
||||
/// <param name="itemType">列表应包含的元素类型。</param>
|
||||
/// <returns>List<itemType> 的 IList 实例。</returns>
|
||||
private static IList CreateGenericList(Type itemType)
|
||||
{
|
||||
var target = new T();
|
||||
var sourceType = source.GetType();
|
||||
var targetType = target.GetType();
|
||||
var sourceProperties = sourceType.GetProperties();
|
||||
foreach (var sourceProperty in sourceProperties)
|
||||
{
|
||||
var targetProperty = targetType.GetProperty(sourceProperty.Name);
|
||||
if (targetProperty != null && targetProperty.CanWrite && sourceProperty.CanRead &&
|
||||
targetProperty.PropertyType == sourceProperty.PropertyType)
|
||||
{
|
||||
var value = sourceProperty.GetValue(source, null);
|
||||
targetProperty.SetValue(target, value, null);
|
||||
}
|
||||
}
|
||||
|
||||
return target;
|
||||
Type listType = typeof(List<>).MakeGenericType(itemType);
|
||||
return (IList)Activator.CreateInstance(listType);
|
||||
}
|
||||
|
||||
|
||||
|
||||
}
|
||||
Reference in New Issue
Block a user