为什么我的 XAML 交互行为在用户控件中不起作用

Question

我正在开发一个利用交互行为来打开/关闭 UI 元素的 UWP 应用程序。

作为一个小背景故事，我的应用程序以前在所有相关视图中对客户选择边栏选项卡视图和边栏选项卡使用复制/粘贴 XAML。

在该 XAML 中，交互行为/触发器将关闭一个边栏选项卡，然后在单击完美工作的按钮时打开另一个边栏选项卡。

鉴于将相同的 XAML 复制粘贴到各个地方的混乱，我清理了该 UI 部分并将其移动到它自己的用户控件中，我只是设法以我需要的方式使用绑定和所有内容。唯一的问题是我的交互行为/触发器不再工作，因为它们是用户控件的一部分。

下面是与按钮中的行为/触发器相关的特定 XAML：

<Button x:Name="CreatNewCustomer"
                            HorizontalAlignment="Stretch"
                            Content="New Customer"
                            VerticalAlignment="Stretch"
                            Height="45"
                            Background="#FF007ACC"
                            Width="auto"
                            Foreground="#FFCDCDCD"
                            Margin="5">
                        <interactivity:Interaction.Behaviors>
                            <core:EventTriggerBehavior EventName="Click">
                                <core:ChangePropertyAction  TargetObject="NewCustomerBlade"
                                                            PropertyName="IsOpen"
                                                            Value="True" />
                            </core:EventTriggerBehavior>
                        </interactivity:Interaction.Behaviors>
                    </Button>

这是我的整个用户控件：

<UserControl x:Class="myapp.Views.CustomerDatabaseControl"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:local="using:retailemployeetoolset.Views"
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
         xmlns:controls="using:Microsoft.Toolkit.Uwp.UI.Controls"
         xmlns:interactivity="using:Microsoft.Xaml.Interactivity"
         xmlns:core="using:Microsoft.Xaml.Interactions.Core"
         xmlns:models="using:myapp.Models"
         mc:Ignorable="d"
         d:DesignHeight="840"
         d:DesignWidth="1320">
<Grid x:Name="AddCustomerBlades">
    <controls:BladeView x:Name="CustomerSearchBladeview"
                        IsEnabled="True"
                        BladeMode="Fullscreen">
        <controls:BladeItem x:Name="SearchCustomerBlade"
                            Width="1325"
                            Background="#FF1E1E1E"
                            Height="712"
                            TitleBarVisibility="Collapsed"
                            IsOpen="True"
                            BorderThickness="5"
                            BorderBrush="#FF707070">
            <StackPanel>
                <StackPanel Orientation="Horizontal"
                            Height="65">
                    <TextBlock Text="Customers"
                               FontSize="38"
                               Margin="10"
                               Foreground="#FFCDCDCD"
                               Width="825" />
                    <StackPanel Orientation="Horizontal"
                                Width="465">
                        <TextBlock Text="Search: "
                                   FontSize="28"
                                   Margin="5"
                                   Foreground="#FFCDCDCD"
                                   Width="90"
                                   VerticalAlignment="Center" />
                        <TextBox x:Name="CustomerSearch"
                                 TextWrapping="Wrap"
                                 Height="46"
                                 Width="350"
                                 Margin="5" />
                    </StackPanel>
                </StackPanel>
                <StackPanel Orientation="Horizontal"
                            Margin="5"
                            HorizontalAlignment="Right">
                    <Button x:Name="CreatNewCustomer"
                            HorizontalAlignment="Stretch"
                            Content="New Customer"
                            VerticalAlignment="Stretch"
                            Height="45"
                            Background="#FF007ACC"
                            Width="auto"
                            Foreground="#FFCDCDCD"
                            Margin="5">
                        <interactivity:Interaction.Behaviors>
                            <core:EventTriggerBehavior EventName="Click">
                                <core:ChangePropertyAction  TargetObject="NewCustomerBlade"
                                                            PropertyName="IsOpen"
                                                            Value="True" />
                            </core:EventTriggerBehavior>
                        </interactivity:Interaction.Behaviors>
                    </Button>
                    <Button x:Name="CloseCustomerWindow"
                            HorizontalAlignment="Stretch"
                            Content="Close Window"
                            VerticalAlignment="Stretch"
                            Height="45"
                            Background="#FF007ACC"
                            Width="auto"
                            Foreground="#FFCDCDCD"
                            Margin="5" />
                </StackPanel>
                <StackPanel Margin="0,5"
                            Orientation="Horizontal">
                    <StackPanel Width="1307">
                        <GridView Name="CustomerList"
                                  ItemsSource="{Binding CustomerDatabase}"
                                  SelectedItem="{Binding SelectedCustomer, Mode=TwoWay}"
                                  Width="auto"
                                  Height="685"
                                  Background="#FF2E2B2B"
                                  BorderThickness="3"
                                  BorderBrush="#FF707070"
                                  Margin="10,0,8,0">
                            <GridView.Header>
                                <Grid>
                                    <Grid.ColumnDefinitions>
                                        <ColumnDefinition Width="254" />
                                        <ColumnDefinition Width="254" />
                                        <ColumnDefinition Width="254" />
                                        <ColumnDefinition Width="254" />
                                        <ColumnDefinition Width="254" />
                                    </Grid.ColumnDefinitions>
                                    <Grid.RowDefinitions>
                                        <RowDefinition Height="auto" />
                                        <RowDefinition Height="8" />
                                    </Grid.RowDefinitions>
                                    <TextBlock Grid.Row="0"
                                               Grid.Column="0"
                                               Text="First Name"
                                               TextAlignment="Center"
                                               FontWeight="Bold"
                                               FontSize="16"
                                               Margin="7,0,0,1"
                                               Foreground="#FFCDCDCD" />
                                    <TextBlock Grid.Row="0"
                                               Grid.Column="1"
                                               Text="Last Name"
                                               TextAlignment="Center"
                                               FontWeight="Bold"
                                               FontSize="16"
                                               Margin="7,0,0,1"
                                               Foreground="#FFCDCDCD" />
                                    <TextBlock Grid.Row="0"
                                               Grid.Column="2"
                                               Text="Enail"
                                               TextAlignment="Center"
                                               FontWeight="Bold"
                                               FontSize="16"
                                               Margin="7,0,0,1"
                                               Foreground="#FFCDCDCD" />
                                    <TextBlock Grid.Row="0"
                                               Grid.Column="3"
                                               Text="Phone Number"
                                               TextAlignment="Center"
                                               FontWeight="Bold"
                                               FontSize="16"
                                               Margin="7,0,0,1"
                                               Foreground="#FFCDCDCD" />
                                    <TextBlock Grid.Row="0"
                                               Grid.Column="4"
                                               Text="Organization"
                                               TextAlignment="Center"
                                               FontWeight="Bold"
                                               FontSize="16"
                                               Margin="7,0,0,1"
                                               Foreground="#FFCDCDCD" />
                                </Grid>
                            </GridView.Header>
                            <GridView.ItemContainerStyle>
                                <Style TargetType="GridViewItem">
                                    <Setter Property="Margin"
                                            Value="7,0,0,1" />
                                    <Setter Property="HorizontalAlignment"
                                            Value="Center" />
                                </Style>
                            </GridView.ItemContainerStyle>
                            <GridView.ItemTemplate>
                                <DataTemplate x:DataType="models:Customer">
                                    <Grid>
                                        <Grid.ColumnDefinitions>
                                            <ColumnDefinition Width="254" />
                                            <ColumnDefinition Width="254" />
                                            <ColumnDefinition Width="254" />
                                            <ColumnDefinition Width="254" />
                                            <ColumnDefinition Width="254" />
                                        </Grid.ColumnDefinitions>
                                        <Grid.RowDefinitions>
                                            <RowDefinition Height="45" />
                                        </Grid.RowDefinitions>

                                        <Border BorderThickness="2"
                                                BorderBrush="#FF575454"
                                                Grid.Column="0">
                                            <TextBlock Text="{x:Bind CustomerFirstName}"
                                                       Foreground="#FFCDCDCD"
                                                       Width="auto"
                                                       Margin="0,8,0,-2"
                                                       TextAlignment="Center" />
                                        </Border>
                                        <Border BorderThickness="2"
                                                BorderBrush="#FF575454"
                                                Grid.Column="1">
                                            <TextBlock Text="{x:Bind CustomerLastName}"
                                                       Foreground="#FFCDCDCD"
                                                       Width="auto"
                                                       Margin="0,10,0,0"
                                                       TextAlignment="Center" />
                                        </Border>
                                        <Border BorderThickness="2"
                                                BorderBrush="#FF575454"
                                                Grid.Column="2">
                                            <TextBlock Text="{x:Bind CustomerEmail}"
                                                       Foreground="#FFCDCDCD"
                                                       Width="auto"
                                                       Margin="0,8,0,0"
                                                       TextAlignment="Center" />
                                        </Border>
                                        <Border BorderThickness="2"
                                                BorderBrush="#FF575454"
                                                Grid.Column="3">
                                            <TextBlock Text="{x:Bind CustomerPhoneNumber}"
                                                       Foreground="#FFCDCDCD"
                                                       Width="auto"
                                                       TextAlignment="Center" />
                                        </Border>
                                        <Border BorderThickness="2"
                                                BorderBrush="#FF575454"
                                                Grid.Column="4">
                                            <TextBlock Text="{x:Bind OrganizationName}"
                                                       Foreground="#FFCDCDCD"
                                                       Width="auto"
                                                       TextAlignment="Center" />
                                        </Border>
                                    </Grid>
                                </DataTemplate>
                            </GridView.ItemTemplate>
                        </GridView>
                    </StackPanel>
                </StackPanel>
            </StackPanel>
        </controls:BladeItem>
        <controls:BladeItem x:Name="CustomerAddBlade"
                            Width="1320"
                            Background="#FF1E1E1E"
                            Height="835"
                            TitleBarVisibility="Collapsed"
                            IsOpen="False"
                            BorderThickness="5"
                            BorderBrush="#FF707070">
            <StackPanel>
                <TextBlock Text="Add Customer"
                           FontSize="48"
                           Foreground="#FFCDCDCD"
                           Height="56"
                           Margin="15"
                           HorizontalAlignment="Left" />
                <StackPanel  HorizontalAlignment="Center"
                             Width="409">
                    <StackPanel Margin="10,0">
                        <TextBlock Text="Email Address:"
                                   FontSize="22"
                                   Foreground="#FFCDCDCD"
                                   Height="36"
                                   Margin="3" />
                        <TextBox x:Name="EmailBox"
                                 TextWrapping="Wrap"
                                 Height="50"
                                 Margin="3" />
                    </StackPanel>
                    <StackPanel Margin="10,0">
                        <TextBlock Text="First Name:"
                                   FontSize="22"
                                   Foreground="#FFCDCDCD"
                                   Height="36"
                                   Margin="3" />
                        <TextBox x:Name="FirstNameBox"
                                 TextWrapping="Wrap"
                                 Height="50"
                                 Margin="3" />
                    </StackPanel>
                    <StackPanel Margin="10,0">
                        <TextBlock Text="Last Name:"
                                   FontSize="22"
                                   Foreground="#FFCDCDCD"
                                   Height="36"
                                   Margin="3" />
                        <TextBox x:Name="LastNameBox"
                                 TextWrapping="Wrap"
                                 Height="50"
                                 Margin="3" />
                    </StackPanel>
                    <StackPanel Margin="10,0">
                        <TextBlock Text="Phone Number:"
                                   FontSize="22"
                                   Foreground="#FFCDCDCD"
                                   Height="36"
                                   Margin="3" />
                        <TextBox x:Name="PhoneBox"
                                 TextWrapping="Wrap"
                                 Height="50"
                                 Margin="3" />
                    </StackPanel>
                    <CheckBox x:Name="BusinessCustomerCheckbox"
                              Content="Business Customer"
                              HorizontalAlignment="Stretch"
                              VerticalAlignment="Stretch"
                              Height="21"
                              Margin="10"
                              Foreground="#FFCDCDCD" />
                    <StackPanel x:Name="OrgNamePanel"
                                Visibility="Visible"
                                Margin="10,0">
                        <TextBlock Text="Organization Name:"
                                   FontSize="22"
                                   Foreground="#FFCDCDCD"
                                   Height="36"
                                   Margin="3" />
                        <TextBox x:Name="BusinessNameBox"
                                 TextWrapping="Wrap"
                                 Height="50"
                                 Margin="3" />
                    </StackPanel>
                    <Button x:Name="AddNewCustomerButton"
                            HorizontalAlignment="Stretch"
                            Content="Add Customer"
                            VerticalAlignment="Stretch"
                            Height="60"
                            Background="#FF007ACC"
                            Foreground="#FFCDCDCD"
                            Margin="20">
                    </Button>
                </StackPanel>
            </StackPanel>
        </controls:BladeItem>
    </controls:BladeView>
</Grid>

在用户控件中使用行为时，是否需要以不同的方式执行某些操作？或者它们是否可以不在用户控件中使用？

我可以在后面的代码中创建属性，以便用户控件处理打开和关闭我的刀片，但这感觉会很草率，并且需要比使用行为所需的 8 行代码更多的代码。

编辑： 添加我收到的异常，以防其他人搜索类似的错误。

"在字符串类型上找不到名为 Windows.UI.Xaml.PropertyPath 的属性。

Answer 1

我认为TargetObject="NewCustomerBlade"行不通。你能试试TargetObject="{Binding ElementName=NewCustomerBlade}"吗？

您还需要将此行为置于用户控件之外，即NewCustomerBlade控件所在的位置。确保按钮和控件位于同一页面上。

Answer 2

听起来您的事件处理程序没有得到正确解析。如果要在与控件不同的类中指定单击处理程序，则可以使用 x：bind 将其连接起来。

查看以下从 MSDN 获取的代码

<ComboBox x:Name="ColorComboBox"
      ItemsSource="{x:Bind SettingsVM.Colors}"
      SelectionChanged="{x:Bind SettingsVM.ColorDefinitionChanged(SelectedItem)}" />
void ColorDefinitionChanged(ColorDefinition def)
{
   ...
}