Question

在我的UWP应用中，在后面的代码中

val inputs: Array[Column]
def myUDF: UserDefinedFunction = udf { 
    (input1: String, input2: Timestamp, otherInputs: Double*) => ... }
df.withColumn(colName, myUDF(inputs:_*))

返回 false ；当我在使用UserControl的page.xaml中使用VisualStateManager xaml块时。

这是我的意思。这是使用用户控制的page.xaml：

VisualStateManager.GoToState(this,"Layout2",false);

从代码中，我试图更改布局状态。但不幸的是无法做到这一点。

我也曾尝试发送“ this.mainControl”而不是“ this”，但失败了。

<local:MainUserControl x:Name="mainControl">
    <local:MainUserControl.QuestionContent>
        <Grid>
            <Grid.RowDefinitions>
                <RowDefinition Height="200"/>
                <RowDefinition Height="200"/>
            </Grid.RowDefinitions>
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="200"/>
                <ColumnDefinition Width="200"/>
            </Grid.ColumnDefinitions>

            <Border x:Name="imageControl" Background="Red" Height="200" Width="200" Grid.Row="0" Grid.Column="0"/>
            <Border x:Name="richTextBoxControl" Background="Yellow" Grid.Row="0" Grid.Column="1" HorizontalAlignment="Stretch" VerticalAlignment="Stretch"/>


            <VisualStateManager.VisualStateGroups>
                <VisualStateGroup>
                    <VisualState x:Name="Layout1"/>
                    <VisualState x:Name="Layout2">
                        <Storyboard>
                            <ObjectAnimationUsingKeyFrames Storyboard.TargetName="imageControl" Storyboard.TargetProperty="(Grid.Column)">
                                <DiscreteObjectKeyFrame KeyTime="0" Value="1"/>
                            </ObjectAnimationUsingKeyFrames>
                            <ObjectAnimationUsingKeyFrames Storyboard.TargetName="richTextBoxControl" Storyboard.TargetProperty="(Grid.Column)">
                                <DiscreteObjectKeyFrame KeyTime="0" Value="0"/>
                            </ObjectAnimationUsingKeyFrames>
                        </Storyboard>
                    </VisualState>
                </VisualStateGroup>
            </VisualStateManager.VisualStateGroups>

        </Grid>

    </local:MainUserControl.QuestionContent>
</local:MainUserControl>

我还检查了我的命名空间两次，但无法解决此问题。

当我删除时请注意

VisualStateManager.GoToState(this.mainControl,"Layout2",false)

一切正常。

任何帮助将不胜感激。

谢谢。

编辑：这是我的MainUserControl.xaml

<local:MainUserControl x:Name="mainControl">
<local:MainUserControl.QuestionContent>

这是我的MainUserControl.xaml.cs

<UserControl
x:Class="MyProject.Pages.MainUserControl"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:MyProject.Pages"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d">


<Grid Background="#ededed">
    <Grid.RowDefinitions>
        <RowDefinition Height="227"/>
        <RowDefinition Height="625"/>
        <RowDefinition Height="227"/>
    </Grid.RowDefinitions>
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="692"/>
        <ColumnDefinition Width="1000"/>
        <ColumnDefinition Width="228"/>
    </Grid.ColumnDefinitions>

    <StackPanel Grid.Row="1" Grid.Column="1" Background="White" >

        <StackPanel x:Name="panelQuestion">
            <ContentPresenter Content="{x:Bind QuestionContent}"/>
        </StackPanel>

    </StackPanel>

</Grid>

}

Answer 1

您需要将VisualStateManager.VisualStateGroups作为根面板Grid的直接子标记，如下所示：

<Grid>
    <VisualStateManager.VisualStateGroups>
        <VisualStateGroup>
            <VisualState x:Name="Layout1"/>
            <VisualState x:Name="Layout2">
                <Storyboard>
                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="imageControl" Storyboard.TargetProperty="(Grid.Column)">
                        <DiscreteObjectKeyFrame KeyTime="0" Value="1"/>
                    </ObjectAnimationUsingKeyFrames>
                    <ObjectAnimationUsingKeyFrames Storyboard.TargetName="richTextBoxControl" Storyboard.TargetProperty="(Grid.Column)">
                        <DiscreteObjectKeyFrame KeyTime="0" Value="0"/>
                    </ObjectAnimationUsingKeyFrames>
                </Storyboard>
            </VisualState>
        </VisualStateGroup>
    </VisualStateManager.VisualStateGroups>
    <local:MainUserControl x:Name="mainControl">
        <local:MainUserControl.QuestionContent>
            <Grid>
                <Grid.RowDefinitions>
                    <RowDefinition Height="200"/>
                    <RowDefinition Height="200"/>
                </Grid.RowDefinitions>
                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="200"/>
                    <ColumnDefinition Width="200"/>
                </Grid.ColumnDefinitions>
                <Border x:Name="imageControl" Background="Red" Height="200" Width="200" Grid.Row="0" Grid.Column="0"/>
                <Border x:Name="richTextBoxControl" Background="Yellow" Grid.Row="0" Grid.Column="1" HorizontalAlignment="Stretch" VerticalAlignment="Stretch"/>
            </Grid>
        </local:MainUserControl.QuestionContent>
    </local:MainUserControl>
</Grid>

然后，在此XAML页的代码后，您可以调用VisualStateManager.GoToState(this, "Layout2", false);来更改视觉状态。

消耗UserControl在UWP App中不起作用的Page.xaml中的VisualStateManager

1 个答案: