Bind object data to Int xamarin forms - xamarin

Question

I have a MasterDetailPage that creates several Department objects. I want to grab the current department number so I can use it to sort a list later on in my program. How do I go about doing that? I have tried binding it to a label and then getting the data from that (very hacky, I know) but that's the only thing I could think of.
Department[] departments = {
new Department ("D", 1),
new Department ("De", 7),
new Department ("G", 4),
new Department ("M", 9),
new Department ("Pr", 167),
new Department ("Fr", 187),
new Department ("H", 169),
new Department ("B", 11),
new Department ("S", 399),
new Department ("N", 407),
new Department ("O", 201),
new Department ("U", 023)
};
ListView listView = new ListView {
ItemsSource = departments
};
this.Master = new ContentPage {
Title = "Departments", // Title required!
Content = new StackLayout {
Children = {
header,
listView
}
}
};
DetailPage2 detailPage = new DetailPage2 ();
this.Detail = detailPage; //detail page is where I want to use deptNum for sorting
listView.ItemSelected += (sender, args) => {
// Set the BindingContext of the detail page.
this.Detail.BindingContext = args.SelectedItem;
// Show the detail page.
this.IsPresented = false;
};
// Initialize the ListView selection.
listView.SelectedItem = departments [0];
}
}
}
Then in my detailpage I want to be able to pull the departmentNumber out and use it as an int
using System;
using Xamarin.Forms;
namespace irisxamarin
{
public class Department :BindableObject
{
public Department (string name, int deptNumber)
{
this.Name = name;
this.DeptNum = deptNumber;
}
public string Name { private set; get; }
public int DeptNum { private set; get; }
public override string ToString ()
{
return Name;
}
}
}
And here is some logic in the detailpage. This is where I would like to grab the current deptNum.
namespace irisxamarin
{
public class DetailPage2 : ContentPage
{
public DetailPage2 ()
{
Request request = new Request ();
Button settingsButton = new Button {
Text = "Settings",
TextColor = Color.Gray
};
//......................
//code above and below
ListView itemsList = new ListView {
ItemsSource = request.GetList (deptNum) //USE INT HERE
};
itemsList.ItemSelected += (sender, args) => {
this.BindingContext = args.SelectedItem;
};
itemLabel.SetBinding (Label.TextProperty, "DeptNum");
//DeptNum is the data I want but not in a label, just the int val
var listFrame = new Frame {
Content = itemsList,
OutlineColor = Color.Silver,
};

Answer 1

Each page is just a C# class. You can pass a value to it the way you would do with any class - generally the easiest way is to
pass values in the constructor
or if the page already exists, create public properties and set the value via the setter
If you want to set a value globally for use throughout your app, you can create a static class that is available everywhere and set state values in that class.