Is it actually possible to use bindings with the Setters Value property in VisualState, because when I try to use x:Bind the initial view of the page is not using the bindings and with Binding the page does not use them ever or do I need to do something additional?
For example if I use the layout below and I start the app with a width between 400 - 800 the PassInput Passwordbox will not have a placeholder. When I resize the window to more than 800 and then back it will finally have the placeholder.
Example:
<Page
x:Class="UWP.Learning.MainPage"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
x:Name="Page">
<RelativePanel Background="White">
<VisualStateManager.VisualStateGroups>
<VisualStateGroup x:Name="WindowSizeStates">
<VisualState x:Name="SmallState">
<VisualState.StateTriggers>
<AdaptiveTrigger MinWindowWidth="400" />
</VisualState.StateTriggers>
<VisualState.Setters>
<Setter Target="PassInput.PlaceholderText" Value="{x:Bind MyPlaceHolder, Mode=OneWay}" />
</VisualState.Setters>
</VisualState>
<VisualState x:Name="WideState">
<VisualState.StateTriggers>
<AdaptiveTrigger MinWindowWidth="800" />
</VisualState.StateTriggers>
<VisualState.Setters>
<Setter Target="PassInput.PlaceholderText" Value="{x:Null}" />
</VisualState.Setters>
</VisualState>
</VisualStateGroup>
</VisualStateManager.VisualStateGroups>
<TextBlock
Name="PassLabel"
RelativePanel.AlignTopWithPanel="True"
RelativePanel.AlignLeftWithPanel="True"
RelativePanel.AlignRightWithPanel="True"
Text="Pass input label"
HorizontalAlignment="Center" />
<PasswordBox
Name="PassInput"
RelativePanel.AlignLeftWithPanel="True"
RelativePanel.AlignRightWithPanel="True"
RelativePanel.Below="PassLabel"
VerticalAlignment="Center"
Margin="20,0" />
</RelativePanel>
</Page>
Code behind:
namespace UWP.Learning
{
using Windows.UI.Xaml.Controls;
public sealed partial class MainPage : Page
{
public MainPage() { this.InitializeComponent(); }
public string MyPlaceHolder => "FOOBAR";
}
}
Looks like a bug to me. An easy workaround is to have a one-time check within the Loaded
event.
Loaded += (s, e) =>
{
switch (ActualWidth)
{
case var w when (w >= 400 && w < 800):
VisualStateManager.GoToState(this, "SmallState", false);
break;
case var w when (w >= 800):
VisualStateManager.GoToState(this, "WideState", false);
break;
}
};
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.