muak/AiForms.Dialogs

How can I access the viewModel properties from the code behind?

sqrg opened this issue · 12 comments

sqrg commented

I have this

Dialog.Instance.ShowAsync<GradientDialogView>(new { Content = "Sample alert text", OkText = "OK", GradientInitialColor = "#ED213A" });

And I would like to access the Content, OkText, and GradientInitialColor in the code behind of the DialogView. Is there a way to do this?

nexussays commented

The object you pass in to ShowAsync() is set as the BindingContext of the dialog view, so just using Binding like normal.

sqrg commented

It's not working for me (I can access the BindingContext in the .xaml but for some reason I'm not able to do it from the code-behind)

I used the DialogView constructor as a work-around, like this

sqrg commented

Yes, I get it. But how can I access that BindingContext from the code behind?

nexussays commented

What is the actual code you are having the problem with? Accessing the BindingContext property should just work.

muak commented

@sqrg
First of all, the BindingContext can be get in OnBindingContextChanged override method.
The type of BindingContext is object type.
So you should cast to an appropriate type.
Because of using an anonymous class in your sample, you should use the defined class.

public class Some
{
   public string Content {get;set;}
   public string OkText {get;set;}
   public string GradientInitialColor {get;set;}
}
Dialog.Instance.ShowAsync<GradientDialogView>(new Some { Content = "Sample alert text", OkText = "OK", GradientInitialColor = "#ED213A" });
protected override void OnBindingContextChanged()
{
    base.OnBindingContextChanged();
    if(BindingContext is Some some)
    {
        Content  = some.Content;
        ... omit
    }
}

However, It seems that data binding is usually used when like this pattern.

muak commented

@nexussays
Thank you for your answer!

  • 😄1
nexussays commented

@muak Thank you for sharing the lib!

  • 😄1
sqrg commented

Thank you both for your answers! But I'm afraid it is not working for me. I'm sure I'm the one doing something wrong, but I can't figure it out.

Here's the sample with the issue

muak commented

@sqrg
The parameters of the dialogview constructor are unnecessary.

sqrg commented

Ohhhh I'm so stupid

Thanks

  • 👍1
  • 😄1