Make registration form with MVVM Galasoft

Question

Hi everyone, 
My application has a registration form, which contains 1 username TextBox , 2 password and password confirmation box . I'm using MVVM model, but I don't know how to pass the text from these TextBoxes to RegistrationViewModel.cs (It's my ViewModel) .
Can anyone instruct me how to make a registration form by using MVVM ?
Thank you

Answer 1

The answer is binding.
You set the datacontext of your window to an instance of the viewmodel.
That can be via the viewmodellocator mechanism in mvvm light.
You will have an example of that if you created an mvvm light solution.
Or
You can just new up an instance in the code behind constructor of your window and set the datacontext.
You can see a bunch of examples of doing this in my samples:
https://gallery.technet.microsoft.com/WPF-RowNo-in-Datagrid-5102958e
https://gallery.technet.microsoft.com/WPF-Highlight-Changed-a77976d4
https://gallery.technet.microsoft.com/WPF-EntityFramework-MVVM-c7167301
In the viewmodel you need a public property for each of your textboxes, bound to the text property.
You change the text in  the textbox and the bound property changes once that is commited.
Depending on the binding this is when you tab off or on changing the text.
The viewmodel should inherit from viewmodelbase.
So you would have something roughly like
public class RegViewModel : ViewModelBase
private string passWord;
public string PassWord
get { return passWord; }
set
passWord = value;
RaisePropertyChanged();
in the markup
<TextBox Text="{Binding Password, Mode=TwoWay}"
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My latest Technet article - Dynamic XAML