How to add Menus at runtime in Main Window

[solka2050]

i want after user login main menu is added . is it possible???? Please help me

[kozw]

The approach I would recommend is using a view-model where you define your LinkGroups and Links in an ObservableCollection. Your ModernWindow view should bind to this view-model. When your app is in a non-logged-in state, there are no groups and links, when logged-in you add your LinkGroups and Links. Makes sense?

[solka2050]

Do you have any example for link-groups that can help me better? Thanks

[kozw]

Consider the following viewmodel

    public class ViewModel
        : NotifyPropertyChanged
    {
        private LinkGroupCollection groups = new LinkGroupCollection();

        public LinkGroupCollection Groups
        {
            get { return this.groups; }
        }

        public void Login(string user, string password)
        {
            // TODO: validate credentials
            var success = true;
            if (success) {
                // logged in, fill groups
                var group = new LinkGroup { DisplayName = "group" };
                group.Links.Add(new Link { DisplayName = "link 1" });
                group.Links.Add(new Link { DisplayName = "link 2" });
                this.groups.Add(group);
            }
        }

        public void Logout()
        {
            // remove all groups and links
            this.groups.Clear();
        }
    }

In your MainWindows.xaml.cs, assign the view model to the window DataContext like so;

    public MainWindow()
    {
        InitializeComponent();

        var vm = new ViewModel();
        this.DataContext = vm;

        // login
        vm.Login(null, null);
    }

And in you MainWindow.xaml, make sure the MenuLinkGroups are bound to the ViewModel.Groups;

<mui:ModernWindow x:Class="muitest.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        ...
        MenuLinkGroups="{Binding Groups}">

[solka2050]

its working from mainwindow.xaml But i want to do it from login.xaml

[solka2050]

is it possible or not just tell? can i add menus from different xaml page. I need your reply sir if its not possible i will think on any other solution? Your reply can save my time. Thanks

[heraclesaraujo]

I think you can add an event or some kind of messaging pattern in this case, I've a small app that hides part of the menu when reaches some state, I used messaging to do this. see mvvm light (https://mvvmlight.codeplex.com/) for a sample

[sylveon]

@heraclesaraujo can you say the files for this in your project? cause it's pretty big, and I don't want to take my day to search in it.

[WilliamsKobie]

Place this is the login. It will access the menu items in the main window

var window = Application.Current.MainWindow as ModernWindow; window.MenuLinkGroups.Add(group);