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RefreshView Pull Direction on Windows

  • מאמר

This Universal Windows Platform platform-specific enables the pull direction of a RefreshView to be changed to match the orientation of the scrollable control that's displaying data. It's consumed in XAML by setting the RefreshView.RefreshPullDirection bindable property to a value of the RefreshPullDirection enumeration:

<ContentPage ...
             xmlns:windows="clr-namespace:Xamarin.Forms.PlatformConfiguration.WindowsSpecific;assembly=Xamarin.Forms.Core">
    <RefreshView windows:RefreshView.RefreshPullDirection="LeftToRight"
                 IsRefreshing="{Binding IsRefreshing}"
                 Command="{Binding RefreshCommand}">
        <ScrollView>
            ...
        </ScrollView>
    </RefreshView>
 </ContentPage>

Alternatively, it can be consumed from C# using the fluent API:

using Xamarin.Forms.PlatformConfiguration;
using Xamarin.Forms.PlatformConfiguration.WindowsSpecific;
...
refreshView.On<Windows>().SetRefreshPullDirection(RefreshPullDirection.LeftToRight);

The RefreshView.On<Windows> method specifies that this platform-specific will only run on the Universal Windows Platform. The RefreshView.SetRefreshPullDirection method, in the Xamarin.Forms.PlatformConfiguration.WindowsSpecific namespace, is used to set the pull direction of the RefreshView, with the RefreshPullDirection enumeration providing four possible values:

  • LeftToRight indicates that a pull from left to right initiates a refresh.
  • TopToBottom indicates that a pull from top to bottom initiates a refresh, and is the default pull direction of a RefreshView.
  • RightToLeft indicates that a pull from right to left initiates a refresh.
  • BottomToTop indicates that a pull from bottom to top initiates a refresh.

In addition, the GetRefreshPullDirection method can be used to return the current RefreshPullDirection of the RefreshView.

The result is that a specified RefreshPullDirection is applied to the RefreshView, to set the pull direction to match the orientation of the scrollable control that's displaying data. The following screenshot shows a RefreshView with a LeftToRight pull direction:

Screenshot of a RefreshView with a left to right pull direction, on UWP

Note

When you change the pull direction, the starting position of the progress circle automatically rotates so that the arrow starts in the appropriate position for the pull direction.