Maui Entry Id gives a guid instead of the name-CodePudding

I'm working on an Android Maui app. I have all my Xaml Entry fields named. I programmatically create Unfocused events for each Entry and they all point to the same Unfocused function. If the sender.id is for a certain field name then I perform some validation on it. When I get the value of the sender.id field I get a guid. When I inspect the sender during debug I get the field name.

public async void Unfocused(object sender, FocusEventArgs e)
{
    var entry = (Entry)sender;
    var fieldName = entry.Id.ToString(); // this returns a guid
}

and here's my Xaml

    <Entry Text="{Binding StorageLocation}"
           x:Name="txtStorageLocation"
           StyleId="StorageLocation"
           Placeholder="{Binding LocationOrBinPlaceholder}"
           HorizontalTextAlignment="Center"
           FontSize="20"/>

I'm expecting the sender.Id to be "txtStorageLocation"

CodePudding user response：

In wpf there is a tag property, you can implement a similar in MAUI as an attached property.

namespace Maui
{
    public class AttachedProperties
    {
        public static readonly BindableProperty TagProperty = BindableProperty.Create("Tag", typeof(string), typeof(AttachedProperties), null);

        public static string GetTag(BindableObject bindable)
            => (string)bindable.GetValue(TagProperty);

        public static void SetTag(BindableObject bindable, string value)
            => bindable.SetValue(TagProperty, value);
    }
}

 <Entry    local:AttachedProperties.Tag="txtStorageLocation"
           Text="{Binding StorageLocation}"
           x:Name="txtStorageLocation"
           StyleId="StorageLocation"
           Placeholder="{Binding LocationOrBinPlaceholder}"
           HorizontalTextAlignment="Center"
           FontSize="20"/>

public async void Unfocused(object sender, FocusEventArgs e)
{
    var entry = (Entry)sender;
    var fieldName = AttachedProperties.GetTag(entry);
}

An easier approach (but ugly) is to use ClassId. Please be aware that the intended use case of this property is UI testing.

CodePudding user response：

If you really want to use a Name or Identifier on an Entry in order to process the Unfocused event, then you could implement your own derived NamedEntry class like this:

Inherited class: NamedEntry.cs

public class NamedEntry : Entry
{
    public string Identifier { get; set; }
}

Register handler in MauiProgram.cs

public static MauiApp CreateMauiApp()
{
    var builder = MauiApp.CreateBuilder();
    builder
        .UseMauiApp<App>()
        .ConfigureMauiHandlers(h =>
         {
             h.AddHandler<NamedEntry, EntryHandler>());
         });

    return builder.Build();
}

Use in XAML

<NamedEntry Text="{Binding StorageLocation}"
            Identifier="txtStorageLocation"
            StyleId="StorageLocation"
            Placeholder="{Binding LocationOrBinPlaceholder}"
            HorizontalTextAlignment="Center"
            FontSize="20"/>

Code behind

public async void Unfocused(object sender, FocusEventArgs e)
{
    var entry = (NamedEntry)sender;
    var fieldName = entry.Identifier;
}