MonoTouch.Dialog how to get data from dialog - xamarin.ios

Question

I'm a beginner in MonoTouch and MonoTouch.Dialog.
I am trying to use MT Dialog but I cannot understand how to get data in and out.
Let's say I have Event class:
class Event {
bool type {get;set;}
string name {get;set;}
}
And I want to edit it using this dialog definition:
return new RootElement ("Event Form") {
// string element
new Section ("Information"){
new EntryElement ("Name", "Name of event", ""),
new RootElement ("Type", new RadioGroup (0)){
new Section (){
new RadioElement ("Concert"),
new RadioElement ("Movie"),
new RadioElement ("Exhibition"),
new RadioElement ("Sport")
}
}
},
How can I pass data to and from this form? (using low-level API not Reflection which supports binding)

Answer 1

Very easy, assign the intermediate values to variables:
Section s;
SomeElement e;
return new RootElement ("Foo") {
(s = new Section ("...") {
(e = new StringElement (...))
})
};

Answer 2

You can do something like this:
//custom class to get the Tapped event to work in a RadioElement
class OptionsRadioElement: RadioElement
{
public OptionsRadioElement(string caption, NSAction tapped): base(caption)
{
Tapped += tapped;
}
}
//Custom Controller
public class MyController: DialogViewController
{
private readonly RadioGroup optionsGroup;
private readonly EntryElement nameField;
public MyController(): base(null)
{
//Note the inline assignements to the fields
Root = new RootElement ("Event Form") {
new Section ("Information"){
nameField = new EntryElement ("Name", "Name of event", ""),
new RootElement ("Type", optionsGroup = new RadioGroup (0)){
new Section (){
new OptionsRadioElement("Concert", OptionSelected),
new OptionsRadioElement("Movie", OptionSelected),
new OptionsRadioElement("Exhibition", OptionSelected),
new OptionsRadioElement("Sport", OptionSelected)
}
}
};
}
private void OptionSelected()
{
Console.WriteLine("Selected {0}", optionsGroup.Selected);
}
public void SetData(MyData data)
{
switch(data.Option)
{
case "Concert:
optionsGroup.Selected = 0;
break;
case "Movie":
optionsGroup.Selected = 1;
break;
//And so on....
default:
optionsGroup.Selected = 0;
break;
}
nameField.Value = data.Name;
ReloadData();
}
}