WPF--DependencyProperty

最新推荐文章于 2025-07-18 12:37:47 发布

最新推荐文章于 2025-07-18 12:37:47 发布 · 82 阅读

本文详细介绍了WPF中依赖属性的定义与使用方法，包括如何创建依赖属性、如何通过依赖属性实现属性值的变化监听，以及如何结合依赖属性进行编辑模式的控制等。文章通过具体的代码示例展示了依赖属性在实际应用中的作用。

　WPF中的依赖属性的写法：

　　【依赖属性为扩展类的使用】

　　参考http://msdn.microsoft.com/zh-cn/library/cc221408(v=VS.95).aspx

　　内容。

public bool IsEditable
{
get { return (bool)GetValue(IsEditableProperty); }
set { SetValue(IsEditableProperty, value); }
}
public static readonly DependencyProperty IsEditableProperty =
DependencyProperty.Register(
"IsEditable",
typeof(bool),
typeof(User_Node),
new PropertyMetadata(true));

public bool IsInEditMode
{
get
{
if (IsEditable)
return (bool)GetValue(IsInEditModeProperty);
else
return false;
}
set
{
if (IsEditable)
{
if (value) oldText = Text;
SetValue(IsInEditModeProperty, value);
}
}
}
public static readonly DependencyProperty IsInEditModeProperty =
DependencyProperty.Register(
"IsInEditMode",
typeof(bool),
typeof(User_Node),
new PropertyMetadata(false));

public string TextFormat
{
get { return (string)GetValue(TextFormatProperty); }
set
{
if (value == "") value = "{0}";
SetValue(TextFormatProperty, value);
}
}
public static readonly DependencyProperty TextFormatProperty =
DependencyProperty.Register(
"TextFormat",
typeof(string),
typeof(User_Node),
new PropertyMetadata("{0}"));


---------------------------在修改时响应事件的写法-------------------------------

public string Text
{
get { return (string)GetValue(TextProperty); }
set { SetValue(TextProperty, value); }
}
public static readonly DependencyProperty TextProperty =
DependencyProperty.Register(
"Text",
typeof(string),
typeof(User_Node),
new PropertyMetadata("", OnChanged));
private static void OnChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
string a = "";
}