How to do binding based on a condition in .net maui?

Question

I'd like to ask how to do the conditional binding in a .net Maui app. for example

if I have a class

public class ClassA
{
     public string Property1{get;set;}
     public string Property2{get;set;}
}

and I don't have access to the class implementation so I cannot add methods

and in my view, I want to bind to Property1 if some condition is true and bind to Property2 if that condition was false.

Is there a way to do conditional binding from the view itself without changing ClassA implementation?

Answer 1

I think you could achieve this goal by setting binding property in code-behind (xaml.cs file) instead of .xaml file.

For example:

• In MainPage.xaml, you have a label with name labelA:

  <Label x:Name="labelA" />

• In MainPage.xaml.cs constructor, you could bind Text property of labelA to one of viewModel properties based on a condition.

public MainPage(ClassA viewModel)
{
    InitializeComponent();
    BindingContext = viewModel;

    if (true condition)
    {
        labelA.SetBinding(Label.TextProperty, nameof(viewModel.Property1));
    }
    else
    {
        labelA.SetBinding(Label.TextProperty, nameof(viewModel.Property2));
    }
}