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在foreach循环中编辑列表

ref foreach c#

2

callisto · 技术社区 · 16 年前

class Client
{
- int ID
- int? ParentID
- string Name
- datetime CreateDate
- int ACClientID
- List <Client> Clients }

 private static bool AssignToChildren(ref ATBusiness.Objects.Client client, int ACClientID)
        {
            client.ACClientID = ACClientID;

            foreach (ATBusiness.Objects.Client child in client.Clients)
            {
                AssignToChildren(ref child, ACClientID);
            }
        }

[编辑]我看过 What is the best way to modify a list in a 'foreach' loop?

4 回复 | 直到 9 年前

1

11

AnthonyWJones 16 年前

由于您从未为参数赋值 client ref .

由于您没有修改 List<T> 对象本身,即使在枚举过程中,也没有理由不能修改ACCClientID属性。只有当您试图篡改枚举后面的列表成员身份时,才会出现异常。

2

1

tster 16 年前

    private static bool AssignToChildren(ATBusiness.Objects.Client client, int ACClientID)
    {
        client.ACClientID = ACClientID;

        foreach (ATBusiness.Objects.Client child in client.Clients)
        {
            AssignToChildren(child, ACClientID);
        }
    }

3

0

bruno conde 16 年前

class Client
{
    public Client()
    {
        Clients = new List<Client>();
    }

    public List<Client> Clients { get; private set; }

    private int aCClientID;

    public int ACClientID
    {
        get { return aCClientID; }
        set { aCClientID = value; }
    }

    public int ACClientIDRecursive
    {
        get
        {
            return aCClientID;
        }
        set
        {
            aCClientID = value;
            foreach (var c in Clients)
            {
                c.ACClientIDRecursive = value;
            }
        }
    }
}

4

-2

Sani Huttunen 16 年前

private static bool AssignToChildren(ref ATBusiness.Objects.Client client, int ACClientID)
{
  client.ACClientID = ACClientID;
  for (int i = client.Clients.Count - 1; i >= 0; i--) 
  {
    AssignToChildren(ref client.Clients[i], ACClientID);
  }
}