CODEWITHSUNDEEP
wpfvisual-studio-2010c#-4.0mvvm
Tarun
Tarun

Reputation: 393

How to access ViewModel property(value) in another ViewModel?

I have a one ViewModel like this:

public class TaskTrayViewModel<T> : ViewModelBase where T : IBlotterRow, new()
{ }

this ViewModel contains one property : 

private Product sp;
public Product selectedProduct
{
   get { return sp; }
   set
   {
    sp = value; 
   }

}

I want to access this property(value) in BlotterCriteriaViewModel (other viewModel). All the viewmodels implements InotiFyPropertyChange. I have read some related questions but didnt get anything. I am not using frameworks(prism,galasoft)?

How to pass the property(value) here? Kindly suggest>

Upvotes: 0

Views: 1865

Answers (1)

Vlad
Vlad

Reputation: 35584

Okay, there are at least two ways.

  1. Direct way: the instance of BlotterCriteriaViewModel gets a reference to the instance of TaskTrayViewModel (either at the construction time, or maybe at the point where the value is needed). Having the TaskTrayViewModel reference, public properties can be easily accessed.
  2. Indirect way: the instance of BlotterCriteriaViewModel gets the INotifyPropertyChange reference from TaskTrayViewModel and subscribes to PropertyChanged event. You won't get the initial value of the property, but as soon as the property changes, you get the event and can see the new value in the event args.

Is there a problem with any of these?

Upvotes: 1

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