C# 使用Linq 2 Sql拍摄项目的快照（克隆）

我有一个具有多个子表的项目实体，例如ProjectAwards ProjectTeamMember

我想将项目（和子表）中的数据复制到新的项目记录中，并更新项目状态

乙二醇

我找到了这个链接

---

这是其中的一部分，但它会将子记录更新到新的draftProject，我需要它在其中进行复制。

不幸的是，您在这里所做的是将变量

draftProjectEntity

设置为对

projectEntity

对象的引用。也就是说，它们现在指向同一个对象。您需要做的是深入克隆

projectEntity

-如果你打算经常这样做-那么我强烈建议你研究一下这种方法

然而，如果您只需要深入一层，或者只需要一个小的对象图，那么简单地手工操作并在您的实体上实现您自己的IDeepCloneable可能是值得的

public interface IDeepCloneable<T>
{
    T DeepClone();
}

public class Person : IDeepCloneable<Person> 
{
    public string Name { get; set; }
    public IList<Address> Addresses { get; set; }

    public Person DeepClone()
    {
        var clone = new Person() { Name = Name.Clone().ToString() };

        //have to make a clone of each child 
        var addresses = new List<Address>();
        foreach (var address in this.Addresses)
            addresses.Add(address.DeepClone());

        clone.Addresses = addresses;
        return clone;
    }
}

public class Address : IDeepCloneable<Address>
{
    public int StreetNumber { get; set; }
    public string Street { get; set; }
    public string Suburb { get; set; }

    public Address DeepClone()
    {
        var clone = new Address()
                        {
                            Street = this.Street.Clone().ToString(),
                            StreetNumber = this.StreetNumber, //value type - no reference held
                            Suburb = this.Suburb.Clone().ToString()
                        };
        return clone;
    }
}

//usage:
var source = personRepository.FetchByName("JoeBlogs1999");
var target = source.DeepClone();

//at this point you could set any statuses, or non cloning related changes to the copy etc..

targetRepository.Add(target);
targetRepository.Update;

public接口IDeepCloneable
{
T深克隆（）；
}
公共类人员：IDeepCloneable
{
公共字符串名称{get；set；}
public IList
感谢您的回答，我已经找到并看到了类似的克隆实现，我希望有一个Linq 2 SQL魔术可以按照伪问题代码的思路为我实现。
public interface IDeepCloneable<T>
{
    T DeepClone();
}

public class Person : IDeepCloneable<Person> 
{
    public string Name { get; set; }
    public IList<Address> Addresses { get; set; }

    public Person DeepClone()
    {
        var clone = new Person() { Name = Name.Clone().ToString() };

        //have to make a clone of each child 
        var addresses = new List<Address>();
        foreach (var address in this.Addresses)
            addresses.Add(address.DeepClone());

        clone.Addresses = addresses;
        return clone;
    }
}

public class Address : IDeepCloneable<Address>
{
    public int StreetNumber { get; set; }
    public string Street { get; set; }
    public string Suburb { get; set; }

    public Address DeepClone()
    {
        var clone = new Address()
                        {
                            Street = this.Street.Clone().ToString(),
                            StreetNumber = this.StreetNumber, //value type - no reference held
                            Suburb = this.Suburb.Clone().ToString()
                        };
        return clone;
    }
}

//usage:
var source = personRepository.FetchByName("JoeBlogs1999");
var target = source.DeepClone();

//at this point you could set any statuses, or non cloning related changes to the copy etc..

targetRepository.Add(target);
targetRepository.Update;