c# – EntityFramework核心 – 复制实体并将其放回数据库

其他一些Stackoverflow线程已经提到过,即使数据库中存在相同的主键,EF也会为您处理插入新对象,但我不太确定EF Core是如何处理它的.每当我尝试复制一个对象时,我都会收到错误

Cannot insert explicit value for identity column in table when IDENTITY_INSERT is set to OFF

基本上我只需要一种简洁的方法来复制对象,然后将该副本插回到数据库中,并使Id自动递增.有没有最佳实践或简单的方法,而无需手动将属性设置为null或空？

编辑：从数据库中检索对象的示例代码：

public Incident GetIncidentByIdForCloning(int id)
    {
        try
        {
            return _context.Incident.Single(i => i.IncidentId == id);
        }
        catch
        {
            return null;
        }
    }

检索对象后的代码(因为某些字段是自动生成的,如RowVersion,它是一个时间戳)：

public IActionResult Clone([FromBody]Incident Incident)
    {
        var incidentToCopy = _incidentService.IncidentRepository.GetIncidentByIdForCloning(Incident.IncidentId);
        incidentToCopy.IncidentTrackingRefId = _incidentService.IncidentRepository.GetNextIdForIncidentCategoryAndType(
            Incident.IncidentCategoryLookupTableId,Incident.IncidentTypeLookupTableId).GetValueOrDefault(0);
        incidentToCopy.RowVersion = null;
        incidentToCopy.IncidentId = 0; //This will fail with or without this line,this was more of a test to see if manually setting would default the insert operation,such as creating a brand new object would normally do.
        incidentToCopy.IncidentCategoryLookupTableId = Incident.IncidentCategoryLookupTableId;
        incidentToCopy.IncidentTypeLookupTableId = Incident.IncidentTypeLookupTableId;
        var newIncident = _incidentService.IncidentRepository.CreateIncident(incidentToCopy);
...

我意识到我可以制作一个全新的对象并进行左手复制,但这看起来非常低效,我想知道EF Core是否提供了更好的解决方案.