Question

我有下表

 PNLId  PNLParentId Operator    Sign    DisplayingOrder    PNLGrpId
     0        0         ~            1         1            1
     1       105        +           1         1            2
    11       20         +           -1        1            5

我使用类Node来获取表格中的父/子

class Node
{
    public int Id { get; set; }
    public int? ParentId { get; set; }
    public string Operator { get; set; }
    public Node Parent { get; set; }
    public IList<Node> Children { get; set; }
    public Node()
    {
        Children = new List<Node>();
    }
    public override string ToString()
    {
        return "Node: " + Operator + " " + Id + " " 
            + string.Join(",", Children.Select(x => x.Id));
    }
}

我得到以下结果

[50 Node: + 50 36,37]
[51 Node: + 51 49,50]
[52 Node: + 52 20,21,22]
[69 Node: + 69 56,57,58,59]

如何修改类节点以使子节点成对（Sign，child），类似

[50 Node: + 50 (-1,36),(1,37)]
[51 Node: + 51 (-1,49),(-1,50)]
[52 Node: + 52 (1,20),(-1,21),(-1,22)]
[69 Node: + 69 (-1,56),(-1,57),(1,58),(1,59)]

Answer 1

实施ToString，如下所示：

return "Node: " + Operator + " " + Id + " " + 
       string.Join(",", Children.Select
                         (x => string.Format("({0},{1})", x.Sign, x.Id)));

Answer 2

出于确切目的，请考虑以下步骤：

第1步 - 将Sign属性添加到您的班级

class Node
{

    public int Id { get; set; }
    public int? ParentId { get; set; }
    public string Operator { get; set; }
    public Node Parent { get; set; }
    public IList<Node> Children { get; set; }

    // HERE WE GO
    public int Sign { get; set; }

    ...

}

步骤2 - 确定您有权使用的表与＃34之间的连接;以下是＆＃34;和Node类。在您的代码中确切地说明Id属性是PNLId列的.NET表现形式？
第3步 - 一旦回答了第2步的问题，您必须为Sign属性Sign列关系重新创建相同的效果

第4步 - 改变ToString方法，如下所示：

class Node
{
    ...

    public override string ToString()
    {
        return "Node: " + Operator + " " + Id + " " 
            + string.Join(",", Children.Select(x => string.Format("({0}, {1})", x.Sign, x.Id)));
    }

}

注意：检查Children.Select lambda参数的修改：

Children.Select(x => string.Format("({0}, {1})", x.Sign, x.Id))

用c＃修改类

2 个答案: