[英]How bind control property to a another window property?
我有一個窗口,其中有一個矩形。 我希望它的填充是另一個矩形填充的gradientstop,但在其他窗口上。 “源”窗口定義為:
<Window x:Class="WPF1.ColorSelectorWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:my="clr-namespace:WPF1"
x:Name="colorSelectorWindow"
Title="ColorSelectorWindow" Height="281" Width="540">
有一個矩形
<Rectangle HorizontalAlignment="Left" Margin="40,120,0,41" Stroke="Black" Width="100" Name="ColorPicker">
<Rectangle.Fill>
<SolidColorBrush>
<SolidColorBrush.Color>
...
</SolidColorBrush.Color>
</SolidColorBrush>
</Rectangle.Fill>
</Rectangle>
和一個屬性:
public partial class ColorSelectorWindow : Window
{
public Brush SelectedBrush
{
get
{
return ColorPicker.Fill;
}
}
}
現在,在目標窗口中,我定義一個矩形:
<Rectangle Height="213" HorizontalAlignment="Left" Margin="27,8,0,0" Name="rectangle1" VerticalAlignment="Top" Width="25" Grid.Row="1">
<Rectangle.Fill>
<LinearGradientBrush StartPoint="0,0" EndPoint="1,0">
<GradientStop Offset="0" Color="Blue" />
<GradientStop Offset="1" Color="{Binding ElementName=colorWindowSelector, Path=SelectedBrush, Converter={StaticResource BrushToColorConverter}}" />
</LinearGradientBrush>
</Rectangle.Fill>
</Rectangle>
其中BrushToColorConverter將“畫筆”轉換為“顏色”。 這是行不通的,我也不知道為什么,看來我在處理“源”窗口時遇到了問題。我正在目標窗口構造函數中構建它:
public MainWindow()
{
colorWindow = new ColorSelectorWindow();
colorWindow.Name = "colorWindowSelector";
colorWindow.Hide();
InitializeComponent();
}
我只是隱藏並顯示它,不能確定關閉。 如何正確綁定?
您需要在MainWindow上公開屬性SelectedBrush,並且只需要使用RelativeSource綁定到此Brush的顏色即可。 因此,這將為您做-
<Rectangle Height="213" HorizontalAlignment="Left" Margin="27,8,0,0" Name="rectangle1" VerticalAlignment="Top" Width="25" Grid.Row="1">
<Rectangle.Fill>
<LinearGradientBrush StartPoint="0,0" EndPoint="1,0">
<GradientStop Offset="0" Color="Blue" />
<GradientStop Offset="1" Color="{Binding Path=Owner.SelectedBrush, RelativeSource={RelativeSource Mode=FindAncestor, AncestorType =Window} Converter={StaticResource BrushToColorConverter}}" />
</LinearGradientBrush>
</Rectangle.Fill>
</Rectangle>
但是請確保在創建窗口時,將其所有者設置為MainWindow-
public MainWindow()
{
InitializeComponent();
colorWindow = new ColorSelectorWindow();
colorWindow.Name = "colorWindowSelector";
colorWindow.Owner = this;
colorWindow.Hide();
}
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