Question

首先我想做什么：我有一个Popup（显示wenn ALT键已关闭并在向上时隐藏），将其设为Border并在其中TextBlock。这将显示特定字段的键绑定。

<Popup PlacementTarget="{Binding ElementName=txb_ticket_Text}" IsOpen="{Binding ShowTooltip}"
       Style="{DynamicResource TooltipPopup}" >
    <Border Style="{DynamicResource WhiteBorder}">
        <TextBlock Text="{Binding ElementName=kb_ticketselection, Path=Key, Converter={StaticResource KeyToString}}"
                   Style="{DynamicResource Tooltip}"/>
    </Border>
</Popup>

遵循三种风格：

<Style x:Key="Tooltip" TargetType="{x:Type TextBlock}">
    <Setter Property="Background" Value="Black" />
    <Setter Property="Foreground" Value="White" />
    <Setter Property="FontSize" Value="20" />
    <Setter Property="Width" Value="30" />
    <Setter Property="Height" Value="30" />
    <Setter Property="TextAlignment" Value="Center" />
</Style>
<Style x:Key="WhiteBorder" TargetType="{x:Type Border}">
    <Setter Property="BorderBrush" Value="White" />
    <Setter Property="BorderThickness" Value="1" />
</Style>
<Style x:Key="TooltipPopup" TargetType="{x:Type Popup}">
    <Setter Property="Placement" Value="Left" />
    <Setter Property="VerticalOffset" Value="-10" />
</Style>

是否可以制作样式或模板？当然，我有多次使用它，最简单的方法就是设置Textbinding。这三个元素都没有模板。

我的下一个想法是创建一个包含这些元素的UserControl，并设置绑定到Textblock的textproperty？！

€dit：同时我创建了一个UserControl，但现在我遇到了一个简单的问题：

我收到以下错误，但仍然有效...

＆＃34; TargetType＆＃39; StandInPopup＆＃39;＆＃34; entspricht nicht dem Typ des Elements＆＃34; Popup＆＃34;。

＆＃34; TargetType＆＃39; StandInPopup＆＃39;＆＃34;与元素类型不匹配＆＃34;弹出＆＃34;。

如何删除错误？或是什么导致了这个错误，为什么它仍然有效（如预期的那样）？

UC供参考

<UserControl x:Class="PopupTooltip"
             x:Name="ucpopup"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" 
             xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
             xmlns:local="clr-namespace:myClass"
             mc:Ignorable="d" 
             d:DesignHeight="300" d:DesignWidth="300">
    <Grid>
        <Popup PlacementTarget="{Binding ElementName=ucpopup, Path=TargetElement}" IsOpen="{Binding ShowTooltip}"
               Style="{DynamicResource TooltipPopup}" >
            <Border Style="{DynamicResource WhiteBorder}">
                <TextBlock Text="{Binding ElementName=ucpopup, Path=MyText}"
                           Style="{DynamicResource Tooltip}"/>
            </Border>
        </Popup>
    </Grid>
</UserControl>

€：这是UC的其余代码，只需要两个属性：

Public Class PopupTooltip

    Public Sub New()

        ' Dieser Aufruf ist für den Designer erforderlich.
        InitializeComponent()

        ' Fügen Sie Initialisierungen nach dem InitializeComponent()-Aufruf hinzu.

    End Sub

    Private _myText As String
    Public Property MyText() As String
        Get
            Return _myText
        End Get
        Set(ByVal value As String)
            _myText = value
        End Set
    End Property

    Public Shared ReadOnly MyTextProperty As DependencyProperty = DependencyProperty.Register("MyText", GetType(String), GetType(PopupTooltip), New PropertyMetadata(""))

    Private _targetElement As UIElement
    Public Property TargetElement() As UIElement
        Get
            Return _targetElement
        End Get
        Set(ByVal value As UIElement)
            _targetElement = value
        End Set
    End Property

    Public Shared ReadOnly TargetElementProperty As DependencyProperty = DependencyProperty.Register("TargetElement", GetType(UIElement), GetType(PopupTooltip))
End Class

样式边框文本块

0 个答案: