delegates - MonoTouch.Dialog 如何从 radiogroup 获取数据

Question

我是 monotouch.dialog 的初学者。我正在尝试使用带有标题和值的覆盖radioelement从radiogroup中获取一个值作为经典下拉列表！

但问题是检测事件 OnSelect

多元素代码

public class MyRadioElement : RadioElement
  {

    private string Caption{get; set;}
    private int ID{get; set;}

        public MyRadioElement(string caption, int id, NSAction selected): base(caption, id)
        {
            Caption = caption;
            ID = id;

            OnSelected += selected;
        }

    public override void Selected (DialogViewController dvc, UITableView tableView, NSIndexPath path)
    {
        base.Selected (dvc, tableView, path);
        var selected = OnSelected;
        if (selected != null)
            selected ();
    }

    public event NSAction OnSelected;

}

根代码

var rootSex = new RootElement ("SEX",
sexUser = new RadioGroup ("", -1)){new Section ("INSERT SEX"){
from n in Def.Get_Sexes()
select (Element) new MyRadioElement (n.Descr, n.ID, ????delegate????? )}
};

我会使用委托来调用选择事件，但它给了我一个转换错误......

为什么？？？谢谢

Answer 1

这个应该工作

class MyRadioElement: RadioElement
{
    private Action<MyRadioElement> selected;

    public MyRadioElement(string caption, int id,  Action<MyRadioElement> selected): base(caption, id)
    {
        this.selected = selected;
    }


    public override void Selected (DialogViewController dvc, UITableView tableView, NSIndexPath path)
    {
        base.Selected (dvc, tableView, path);

        if (this.selected != null)  
                    this.selected(this);

    }
}

然后您将创建元素为

new MyRadioElement("Caption", 2, MyMethod)

MyMethod 看起来像

private void MyMethod(MyRadioElement e)
{

}