how to have 2 data binding fields in one Xamarin forms label?

Question

Hello I have a app i\'m working on in xamrian froms that gets data from a service. what i\'m trying to do is make the first name and last name fields display in the same label

Answer 1

*Update: With the release of Xamarin Forms 4.7, you can now use Multi-Bindings instead of creating a getter property. Using the first and last name example, you would do something like this:

    
        
            
                
                
            
        
    
    .........

*Pre-Xamarin Forms 4.7 What I do in this situation is to put an extra property on the model that combines the two properties.

public class ContactInfo {
    public string FirstName { get; set; }
    public string LastName { get; set; }
    public string FirstLastName { get { return FirstName + " " + LastName; }}
    //Or use C# 6 goodness
    //public string FirstLastName => FirstName + " " + LastName;
}

Now in your ViewModel, if first or last name changes, you would need to do something like this to update the FirstLastName property:

private string _firstLastName;
public string FirstLastName {
    get { return _firstLastName; }
    set {
        if(_firstLastName != value) {
            _firstLastName = value;
            SetPropertyChanged();
        }
    }
}

private string _firstName;
public string FirstName {
    get { return _firstName; }
    set {
        if(_firstName != value) {
            _firstName = value;
            SetPropertyChanged();
            SetPropertyChanged("FirstLastName"); //Also send alert that FirstLastName changed
        }
    }
}

Then do the same for you LastName property.

Edit: Your XAML would then look like:

    
    .....

Edit2: So since you are probably not ever changing the First or Last Name property while showing the UI, you just need to add the property to your model, like I show in the ContactInfo code above, and then change your label, like I show in the edit above and you will be good to go.