News

Xamarin.Forms 4.7 Ships

Microsoft shipped Xamarin.Forms 4.7, improving the definition of grid columns and rows, multi-bindings, shapes/paths and more.

Here's a look at what's new:

Simplified Grid Row & Column Definitions
When creating a grid, no longer do developers need to specify each column and row definition separately. The simplified process reduces code like this:

<Grid>
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="1*" />
        <ColumnDefinition Width="2*" />
        <ColumnDefinition Width="Auto" />
        <ColumnDefinition Width="*" />
        <ColumnDefinition Width="300" />
    </Grid.ColumnDefinitions>
    <Grid.RowDefinitions>
        <RowDefinition Height="1*" />
        <RowDefinition Height="Auto" />
        <RowDefinition Height="25" />
        <RowDefinition Height= "14" />
        <RowDefinition Height="20" />
    </Grid.RowDefinitions>
</Grid>

to this:

<Grid ColumnDefinitions="1*, 2*, Auto, *, 300"
    RowDefinitions="1*, Auto, 25, 14, 20">
</Grid>

More information is available in the Xamarin.Forms Grid documentation.

Multi-Bindings
This lets developers connect a target property to a list of source properties and then apply logic to produce a value with the inputs specified. It stems from an issue filed in November 2018 to "Add a MultiBinding binding type equivalent to WPF" and was spearheaded by contributor Peter Moore.

"A simple and powerful way to use multi-binding is the ability to format any multi-binding result that's displayed as a string with the StringFormat property," said Jacob Kirsch, program manager, Xamarin.Forms. "This property can be set to a standard .NET formatting string, with placeholders, that specifies how to format the multi-binding result. For example, let's say you wanted to create a label of a user's full name. You can use multi-bindings combined with StringFormat to create a single label that contains the user's full name, regardless of where the user inputs their forename, middle name, or surname."

More information is available in the Xamarin.Forms Multi-Bindings documentation.

Shapes & Paths
This is experimental support, letting developers create any shape they want for an app design, as illustrated in David Ortinau's login screen example. More information is available in Xamarin.Forms Shapes documentation.

Light & Dark Mode
Using UserAppTheme, developers now have more control to manage themes, and this release updates the styling of light and dark modes.

Light and Dark System Themes on iOS and Android
[Click on image for larger view.] Light and Dark System Themes on iOS and Android (source: Microsoft).

More information is in the documentation titled "Respond to system theme changes in Xamarin.Forms applications."

The new release came less than two months after Xamarin.Forms 4.6, when the team noted it was shipping new updates "fast and often." More information on Xamarin.Forms 4.7 can be found in the release notes.

"These new features will let you unleash your full creative abilities when developing Xamarin.Forms applications," said Kirsch in a June 17 blog post.

About the Author

David Ramel is an editor and writer for Converge360.

comments powered by Disqus

Featured

  • Death of the Dev Machine?

    Here's a takeaway from this week's Ignite 2020 event: An advanced Azure cloud portends the death of the traditional, high-powered dev machine packed with computing, memory and storage components.

  • COVID-19 Is Ignite 2020's Elephant in the Room: 'Frankly, It Sucks'

    As in all things of our new reality, there was no escaping the drastic changes in routine caused by the COVID-19 pandemic during Microsoft's big Ignite 2020 developer/IT pro conference, this week shifted to an online-only event after drawing tens of thousands of in-person attendees in years past.

  • Visual Studio 2019 v16.8 Preview Update Adds Codespaces

    To coincide with the Microsoft Ignite 2020 IT pro/developer event, the Visual Studio dev team shipped a new update, Visual Studio 2019 v16.8 Preview 3.1, with the main attraction being support for cloud-hosted Codespaces, now in a limited beta.

  • Speed Lines Graphic

    New for Blazor: Azure Static Web Apps Support

    With Blazor taking the .NET web development world by storm, one of the first announcements during Microsoft's Ignite 2020 developer/IT event was its new support in Azure Static Web Apps.

  • Entity Framework Core 5 RC1 Is Feature Complete, Ready for Production

    The first release candidate for Entity Framework 5 -- Microsoft's object-database mapper for .NET -- has shipped with a go live license, ready for production.

Upcoming Events