TextBox binding not working

I have two UserControls

:

1) ContactDetailsView

.

2) SearchBarView

.

In SearchBarView

I have a button Search

that invokes a command when clicked:Command="{Binding SearchCommand}"

In code SearchBarView

, I have the following code:DataContext = new SearchBarViewModel();

In ContactDetailsView

I have the following code:

xmlns:ViewModel="clr-namespace:Accounts_Manager.UserControls.SearchBar"

in the definition UserControl

and this code below it:

<UserControl.DataContext> <ViewModel:SearchBarViewModel /> </UserControl.DataContext>

I also have one TextBox

with the following definition:

<TextBox x:Name="ContactNameTextBox" FontFamily="Times New Roman" Foreground="DarkRed" HorizontalAlignment="Stretch" HorizontalContentAlignment="Center" IsEnabled="False" Grid.Column="0" Text="{Binding ContactId, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>

I have a class called SearchBarViewModel

with the following code:

    public string ContactId
    {
        get { return m_contactId; }
        set
        {
            m_contactId = value;
            OnPropertyChanged("ContactId");
        }
    }
    public ICommand SearchCommand
    {
        get { return m_searchCommand ?? (m_searchCommand = new RelayCommand(SearchContact)); }
        set { m_searchCommand = value; }
    }
    public void SearchContact(object parameter)
    {
        CurrentContact = DbHandler.Search("עידן");

        ContactId = CurrentContact.FirstName + " " + CurrentContact.LastName;
        BankId = CurrentContact.BankName;
        AccountNumber = CurrentContact.AccountNumber.ToString();
    }

      

        
        
        
      

    

The class is defined as follows; SearchBarViewModel : ViewModelBase

where ViewModelBase

inherits from INotifyPropertyChanged

and implements it.

RelayCommand

inherits from ICommand

and implements it.

And now, after all this, my problem is that when I click the button Search

while waiting for an update TextBox

, I see that everything is being called and updated, the property is hoisted, but TextBox

not updated with the value ContactId

.

Any ideas?