[英]style binding attached property didn't show up
我正在嘗試設計一個按鈕:當鼠標懸停在按鈕上時,按鈕內容會更改。 因此,我正在嘗試使用附加屬性進行設計。
這是我的附屬課程:
class HotButtonAttached:DependencyObject
{
public static int GetNormalStr(DependencyObject obj)
{
return (int)obj.GetValue(NormalStrProperty);
}
public static void SetNormalStr(DependencyObject obj, int value)
{
obj.SetValue(NormalStrProperty, value);
}
// Using a DependencyProperty as the backing store for NormalStr. This enables animation, styling, binding, etc...
public static readonly DependencyProperty NormalStrProperty =
DependencyProperty.RegisterAttached("NormalStr", typeof(int), typeof(HotButtonAttached), new UIPropertyMetadata(0));
public static int GetHotStr(DependencyObject obj)
{
return (int)obj.GetValue(HotStrProperty);
}
public static void SetHotStr(DependencyObject obj, int value)
{
obj.SetValue(HotStrProperty, value);
}
// Using a DependencyProperty as the backing store for HotStr. This enables animation, styling, binding, etc...
public static readonly DependencyProperty HotStrProperty =
DependencyProperty.RegisterAttached("HotStr", typeof(int), typeof(HotButtonAttached), new UIPropertyMetadata(0));
public static int GetDisable(DependencyObject obj)
{
return (int)obj.GetValue(DisableProperty);
}
public static void SetDisable(DependencyObject obj, int value)
{
obj.SetValue(DisableProperty, value);
}
// Using a DependencyProperty as the backing store for Disable. This enables animation, styling, binding, etc...
public static readonly DependencyProperty DisableProperty =
DependencyProperty.RegisterAttached("Disable", typeof(int), typeof(HotButtonAttached), new PropertyMetadata(0));
}
我為此設計了一個樣式:
<Style x:Key="btnStyle1" TargetType="Button">
<Setter Property="Content" Value="{Binding Path=local:HotButtonAttached.NormalStr, RelativeSource={RelativeSource Self}}"/>
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="true">
<Setter Property="Content" Value="{Binding Path=local:HotButtonAttached.HotStr,RelativeSource={RelativeSource Self}}"/>
</Trigger>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Content" Value="{Binding Path=local:HotButtonAttached.Disable,RelativeSource={RelativeSource Self}}"/>
</Trigger>
</Style.Triggers>
</Style>
我將樣式應用於:
<Button x:Name="Btn" Click="Button_Click" Width="48" Height="48" Margin="5" Style="{DynamicResource btnStyle1}"
local:HotButtonAttached.NormalStr="11111"
local:HotButtonAttached.HotStr="22222"
local:HotButtonAttached.Disable="3333">
</Button>
但是問題是按鈕沒有顯示任何內容(懸停時應顯示11111、22222,禁用時應顯示3333)。
如果我將樣式更改為:
<Style x:Key="btnStyle1" TargetType="Button">
<Setter Property="Content" Value="Hi"/>
<Style.Triggers>
<Trigger Property="IsMouseOver" Value="true">
<Setter Property="Content" Value="Good"/>
</Trigger>
<Trigger Property="IsEnabled" Value="False">
<Setter Property="Content" Value="Not good"/>
</Trigger>
</Style.Triggers>
</Style>
現在,每個按鈕將正常顯示“ Hi”,懸停時顯示“ good”,禁用時顯示“不好”。 但是我的目的是設計一個具有動態內容的按鈕模板。 看來我的綁定效果不好,我也不知道如何解決該問題,請幫忙。 謝謝。
當您綁定到附加屬性(例如Canvas.Left,Grid.Column或自定義屬性)時,可以將它們包裝在括號中。 在您的情況下,請更改對以下內容的綁定
Path=(local:HotButtonAttached.HotStr)
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