从 C# 中的列表访问对象参数

Question

我正在创建一个包含许多不同参数的代理对象列表，但我不确定如何使用循环访问我所有对象的特定参数...我在做什么想要做的是从我所有的代理人那里获得所有的 Point3d 位置。我该怎么做？

// Define Agent class
class Agent
{
    Point3d Pos = new Point3d();
    Vector3d Vec = new Vector3d();
    int Alignment;
    double Separation;
    double Cohesion;
    double NeighborRadius;

    public Agent(Point3d pos, Vector3d vec, int alignment, double separation, double cohesion, double neighborRadius)
    {
        Pos = pos;
        Vec = vec;
        Alignment = alignment;
        Separation = separation;
        Cohesion = cohesion;
        NeighborRadius = neighborRadius;
    }
}

protected override void SolveInstance(IGH_DataAccess DA)
{
    // Initialize Agents
    for (int i = 0; i < agents; i++)
    {
        double xPos = RandomfromDouble(0.0, boundx);
        double yPos = RandomfromDouble(0.0, boundy);
        double zPos = RandomfromDouble(0.0, boundz);

        Point3d pos = new Point3d(xPos, yPos, zPos);        // Create Agent Start Position
        Vector3d vec = new Vector3d(xPos + 1, yPos, zPos);  // Create Agent Start Vector

        Agent agent = new Agent(pos, vec, alignment, separation, cohesion, neighborRadius);
        allAgents.Add(agent);
        agentPositions.Add(pos);
    }
}

Answer 1

如果您可以更改 Pos 的访问修饰符：

class Agent
{
    public Point3d Pos = new Point3d();
    //.
    //.
    //.
}

或

class Agent
{
    public Agent()
    {
       Pos = new Point3d();
    }
    public Point3d Pos { get;private set; }
    //.
    //.
    //.
}

List<Agent> allAgents = new List<Agent>();
List<Point3d> agentPositions = new List<Point3d>();

// Initialize Agents
//.
//.
//.


agentPositions = allAgents
            .Select(agent => agent.Pos)
            .ToList();

注意：Linq 可从 .Net Framework 3.5 获得

Answer 2

class Agent
{
    public Point3d Pos {get; private set;}
    public Agent() 
    {
        Pos = new Point3d();
    }
    ....
}
foreach (Agent ag in allAgents)
{
    Console.WriteLine(ag.Pos); //might need to dereference a specific member like x,y, or z
}

Answer 3

您无法访问 Point3d Pos，因为默认情况下它是私有的。所以使用如下所示的 public 访问修饰符，希望它能解决问题：

public Point3d Pos = new Point3d();

从 C# 中的列表访问对象参数

Access object parameters from a List in C#

c#

grasshopper