MonoTouch.Dialog：响应RadioGroup中选择 [英] MonoTouch.Dialog: Responding to a RadioGroup Choice

问题描述

我有一个对话由MonoTouch.Dialog创建。有医生的单选按钮组在列表中：

I have a Dialog created by MonoTouch.Dialog. There is a list of Doctors in a radio group:

    Section secDr = new Section ("Dr. Details") {
       new RootElement ("Name", rdoDrNames){
          secDrNames
    }

我想在一旦医生已被选定的代码更新元素。什么是通知的最佳途径，一个放射性元素已被选中？

I wish to update an Element in the code once a Doctor has been chosen. What's the best way to be notified that a RadioElement has been selected?

推荐答案

创建自己的放射性元素这样的：

class MyRadioElement : RadioElement {
    public MyRadioElement (string s) : base (s) {}

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

    static public event EventHandler<EventArgs> OnSelected;
}

的注：不，如果你想有使用静态事件多个无线电集团的

然后创建一个 rootElement的使用这种新型的，如：

Then create a RootElement that use this new type, like:

    RootElement CreateRoot ()
    {
        StringElement se = new StringElement (String.Empty);
        MyRadioElement.OnSelected += delegate(object sender, EventArgs e) {
            se.Caption = (sender as MyRadioElement).Caption;
            var root = se.GetImmediateRootElement ();
            root.Reload (se, UITableViewRowAnimation.Fade);
        };
        return new RootElement (String.Empty, new RadioGroup (0)) {
            new Section ("Dr. Who ?") {
                new MyRadioElement ("Dr. House"),
                new MyRadioElement ("Dr. Zhivago"),
                new MyRadioElement ("Dr. Moreau")
            },
            new Section ("Winner") {
                se
            }
        };
    }

[更新]

下面是本放射性元素的更现代的版本：

Here is a more modern version of this RadioElement:

public class DebugRadioElement : RadioElement {
    Action<DebugRadioElement, EventArgs> onCLick;

    public DebugRadioElement (string s, Action<DebugRadioElement, EventArgs> onCLick) : base (s) {
        this.onCLick = onCLick;
    }

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

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