PRISM Master-Details with navigation between the Master and details view

Question

Hi, I have a Master list with accounts and a Details list containing transactions.
The Master list : has a UserControl (AccountListView) and Viewmodel(AccountListViewModel)
The list is bound to an observable collection of type AccountViewModel and has a SelectedAccount property to get the current selected account. Each AccountViewModel has a collection of type TransactionViewModel.
 public AccountListView(IAccountListViewModel viewModel)
            //this.DataContext = vm;
            InitializeComponent();
            ViewModel = viewModel;
        public Infrastructure.IViewModel ViewModel
            get
                return (IAccountListViewModel)DataContext;
            set
                DataContext = value;
//the viewmodel
        public AccountListViewModel(IRegionManager regionManager)
            this.regionManager = regionManager;
            this.AccountList = GetAccounts(); // gets the list of accounts from another layer
        public AccountViewModel SelectedAccount
            get { return selectedAccount; }
            set
                selectedAccount = value;
                OnPropertyChanged("SelectedAccount");
And the Details view has a user control(TransactionListView) and a viewmodel(AccountView);
public TransactionListView(IAccountViewModel viewModel)
            InitializeComponent();
            ViewModel = viewModel;
            //this.DataContext = vm.SelectedAccount;
        public Infrastructure.IViewModel ViewModel
            get
               return (IAccountViewModel)DataContext;
            set
                DataContext = value;
//the viewmodel 
public AccountViewModel(Business.Account a)
                AccountId = a.AccountId;
                accountName = a.AccountName;
I created a hyperlink command so that whenever I click on the name of an account from the master list it will navigate to the detail list and set the as the DataContext the account I clicked on. Before I had both Master and Detail lists displayed at the
same time and set the DataContext of the Detail List as the SelectedAccount property(which is bound to the SelectedItem of the Master List) of the Master List. I am not sure how to pass the SelectedAccount when I navigate to the Detail List and set it as the
DataContext of the Detail List.
       

Answer 1

>>I'm using the reguestnavigate method, but from what I read you can't pass objects as parameters ?
As I mentioned there is a NavigationParameters class that you can create an instance of and pass as a parameter to the RequestNavigate method in Prism 5:
private void NavigateTransaction(AccountViewModel obj)
var parameters = new NavigationParameters();
parameters.Add("accountViewModel", obj);
regionManager.RequestNavigate(RegionNames.ContentRegion, new Uri(transactionview, UriKind.Relative), parameters);
The TransactionView should then implement the Microsoft.Practices.Prism.Regions.INavigationAware interface and retrieve the parameter in the OnNavigatedTo method:
public partial class TransactionView : UserControl, INavigationAware
public TransactionView()
InitializeComponent();
void INavigationAware.OnNavigatedTo(NavigationContext navigationContext)
AccountViewModel myParameter = navigationContext.Parameters["accountViewModel"] as AccountViewModel;
this.DataContext = myParameter;
public bool IsNavigationTarget(NavigationContext navigationContext)
return true;
public void OnNavigatedFrom(NavigationContext navigationContext)
In Prism 4 there is no NavigationParameters class so you either need to upgrade to Prism 5 if you haven't already done so or you could store the parameters to be passed yourself somewhere else. Please refer to the following links for more information and
examples of how you could do this:
http://stackoverflow.com/questions/9320638/how-to-pass-an-object-when-navigating-to-a-new-view-in-prism
http://visualstudiomagazine.com/articles/2012/08/20/view-communication-in-wpf-and-prism.aspx
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