how to pass property value to property of another class in wpf mvvm

Question

I want to pass SecondViewModel SecondProperty value to ViewModel myProperty and show the value on TextBlock. i want the codi

Answer 1

If you need that, you should create a VM DataSource to create a dependency in your first VM.

public class YourViewModelDataSource
 {

private ViewModel viewModel;
private SecondViewModel secondViewModel;

public YourViewModelDataSource(ViewModel viewModel, SecondViewModel secondViewModel)
    {
      this.viewModel = viewModel;
      this.secondViewModel = secondViewModel;
    }

public void CreateDataSource()
    {
      this.secondViewModel.PropertyChanged += this.OnSecondViewModelPropertyChanged;
    }

private void OnSecondViewModelPropertyChanged(object sender, PropertyChangedEventArgs e)
        {
            switch (e.PropertyName)
            {
                //As pointed in comments, you need to have the second property in your first ViewModel then do this.
                case "SecondProperty":
                    this.viewModel.myProperty = this.secondViewModel.SecondProperty;
                    break;
            }
        }
  }

When you create your VMs then use this class to create the dependency. Every time SecondViewModel SecondProperty changes, the ViewModel myProperty will be raised. I hope it's clear, let me know if you need something else