/// <summary>
/// 将当前对象所有的属性值复制到 <paramref name="target"/>。
/// </summary>
/// <typeparam name="TTarget">目标的数据类型。</typeparam>
/// <param name="source">复制的源对象。</param>
/// <param name="target">复制的目标对象。</param>
/// <param name="targetStrategy">复制目标的策略。</param>
/// <returns> <paramref name="target"/>。</returns>
public static TTarget CopyTo <TTarget>(this object source, TTarget target, CopyToStrategy targetStrategy = CopyToStrategy.Default)
{
if (source == null)
{
throw new ArgumentNullException(nameof(source));
}
if (target == null)
{
throw new ArgumentNullException(nameof(target));
}
var sMapper = TypeMapper.Create(source.GetType());
var tMapper = TypeMapper.Create(target.GetType());
foreach (var sProperty in sMapper.Properties)
{
var tProperty = tMapper[sProperty.Name];
if (tProperty == null)
{
continue;
}
if (targetStrategy == CopyToStrategy.OnlyPrimaryKey && !tProperty.IsKey ||
(targetStrategy == CopyToStrategy.ExcludePrimaryKey && tProperty.IsKey) ||
!tProperty.Property.CanWrite)
{
continue;
}
object sValue = sProperty.GetValue(source, false);
if (targetStrategy == CopyToStrategy.OnlyChangeValues)
{
if (object.Equals(sValue, sProperty.TypeDefaultValue))
{
continue;
}
}
var spType = sProperty.Property.PropertyType;
var tpType = tProperty.Property.PropertyType;
if (spType != tpType)
{
if (tpType.IsValueType && sValue == null)
{
//throw new ArgumentNullException("{0}.{1}".Fmt(sMapper.Type.Name, sProperty.Property.Name), "目标属性 {0}.{1} 不能为 null 值。".Fmt(tMapper.Type.Name, tProperty.Property.Name));
continue;
}
tProperty.SetValue(target, tpType.ChangeType(sValue), false);
}
else
{
tProperty.SetValue(target, sValue, false);
}
}
return(target);
}
/// <summary>
/// 将当前对象所有的属性值复制成一个新的 <typeparamref name="TTarget"/> 实例。
/// </summary>
/// <typeparam name="TTarget">新的数据类型。</typeparam>
/// <param name="source">复制的源对象。</param>
/// <param name="targetStrategy">复制目标的策略。</param>
/// <returns><typeparamref name="TTarget"/> 的心实例。</returns>
public static TTarget CopyTo <TTarget>(this object source, CopyToStrategy targetStrategy = CopyToStrategy.Default)
{
if (source == null)
{
return(default(TTarget));
}
TTarget t2 = Activator.CreateInstance <TTarget>();
return(CopyTo(source, t2, targetStrategy));
}
/// <summary> /// 将 <paramref name="target"/> 所有的属性值复制到当前对象。 /// </summary> /// <typeparam name="TSource">源的数据类型。</typeparam> /// <typeparam name="TTarget">目标的数据类型。</typeparam> /// <param name="source">复制的源对象。</param> /// <param name="target">复制的目标对象。</param> /// <param name="targetStrategy">复制目标的策略。</param> /// <returns> <paramref name="source"/>。</returns> public static TSource CopyFrom <TSource, TTarget>(this TSource source, TTarget target, CopyToStrategy targetStrategy = CopyToStrategy.Default) => CopyTo <TSource>(target, source, targetStrategy);
/// <summary>
/// 将当前对象所有的属性值复制成一个新的 <typeparamref name="TTarget"/> 实例。
/// </summary>
/// <typeparam name="TTarget">目标的数据类型。</typeparam>
/// <param name="source">复制的源对象。</param>
/// <param name="targetStrategy">复制目标的策略。</param>
/// <returns><typeparamref name="TTarget"/> 的新实例。</returns>
public static TTarget DeepCopy <TTarget>(this TTarget source, CopyToStrategy targetStrategy = CopyToStrategy.Default)
{
return(source.CopyTo <TTarget>(targetStrategy));
}
