我的根ResourceDictionary中有以下内容。 Foreground = Red
部分有效,但自定义附加依赖项属性未设置。
我可以通过代码手动设置它,但我显然希望避免为每个文本框设置它。这在Silverlight中有效吗?我已经看过一些关于在WPF中执行此操作的帖子,我的代码看起来是正确的(对我而言)。
<Style TargetType="TextBox">
<Setter Property="controls:TextBoxContextMenu.HasContextMenu" Value="True" />
<Setter Property="Foreground" Value="Red" />
</Style>
/// <summary>
/// Gets the value of the HasContextMenu attached property for a specified TextBox.
/// </summary>
/// <param name="element">The TextBox from which the property value is read.</param>
/// <returns>The HasContextMenu property value for the TextBox.</returns>
public static bool GetHasContextMenu(TextBox element)
{
if (element == null)
{
throw new ArgumentNullException("element");
}
return (bool)element.GetValue(HasContextMenuProperty);
}
/// <summary>
/// Sets the value of the HasContextMenu attached property to a specified TextBox.
/// </summary>
/// <param name="element">The TextBox to which the attached property is written.</param>
/// <param name="value">The needed HasContextMenu value.</param>
public static void SetHasContextMenu(TextBox element, bool value)
{
if (element == null)
{
throw new ArgumentNullException("element");
}
element.SetValue(HasContextMenuProperty, value);
}
/// <summary>
/// Identifies the HasContextMenu dependency property.
/// </summary>
public static readonly DependencyProperty HasContextMenuProperty =
DependencyProperty.RegisterAttached(
"HasContextMenu",
typeof(bool),
typeof(TextBox),
new PropertyMetadata(false, OnHasContextMenuPropertyChanged));
/// <summary>
/// HasContextMenuProperty property changed handler.
/// </summary>
/// <param name="d">TextBoxContextMenu that changed its HasContextMenu.</param>
/// <param name="e">Event arguments.</param>
private static void OnHasContextMenuPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
// code
}
我应该补充说,附加的依赖属性是在一个继承自RadContextMenu
的类中定义的,这是一个DependencyObject
(我一直在阅读,并且某处建议如果附加属性在这样的类中定义,但这看起来很奇怪)
答案 0 :(得分:0)
我明白了。这确实是由于在我所拥有的课程中定义了附加属性。
为了解决这个问题,我创建了一个名为TextBoxContextMenuService
的新类,并将代码放在那里。