无法在控制器中的视图和操作方法之间传递模型

Question

我有用于对域进行身份验证的操作方法和视图。然后将COM对象传递给下面的视图。如果用户单击我想要做某事的按钮（如下面的动作方法中所示），我需要COM对象。问题是模型Connector传递为null。

查看：

@model Decsec.Models.Connector

@using (Html.BeginForm("ClassifyPrivUsers", "AuthenticateAD", FormMethod.Post))
        {
            <input type="submit" value="Evaluate" class="btn btn btn-block" name="ClassifyPrivUsers" formmethod="post" />
        }

行动方法：

    [HttpPost]
    public ActionResult ClassifyPrivUsers(Connector connector)
    {
        // Extract privileged users from the Active Directory
        var privilegedUsers = ADExtractor.PrivilegedAccess(connector.pc);
        System.Diagnostics.Debug.WriteLine("PRIVILEGED USERS EXTRACTED");

        // Load the trained model for privileged users
        Classifier adminAccCl = LoadModel("LMT");
        System.Diagnostics.Debug.WriteLine("MODEL LOADED");
.....

型号：

public class Connector
{
    public int id { get; set; }
    public PrincipalContext pc { get; set; }
    public DirectoryEntry de { get; set; }

    public Connector(int id, PrincipalContext pc, DirectoryEntry de)
    {
        this.id = id;
        this.pc = pc;
        this.de = de;
    }

    public Connector() { }
}