WPF binding not updating the view

Solution 1:

You need to implement INotifyPropertyChanged in your ViewModel order to notify the View that the property has changed.

Here's a link to the MSDN page for it: System.ComponentModel.INotifyPropertyChanged

The most important thing to note is that you should raise the PropertyChanged event in your property setter.

Solution 2:

Add binding mode two way, because by default Textblock's binding mode is one way

<TextBlock HorizontalAlignment="Left" Name="StatusText" Margin="0,20" TextWrapping="Wrap" Text="{Binding StatusText, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}">
            ... Status ...
</TextBlock>

and also, of course you need to implement INotifyPropertyChanged for the purpose, refer to this link for how to implement.

Solution 3:

When working with DataModels you have to be sure the model is complete at intial load. So if you do this: this.DataContext = mainViewModel and some parts of you mainViewModel are NOT loaded (=null) then you are not able to bind them. Example, I have a Model within that model an object Program. I bind to Text of a TextBlock to Model.Program.Name. The Program object is not connected at initial load so you will have to rebind to a loaded object after because otherwise no notifications can be send.