问题
Possible Duplicate:
Listen to changes of dependency property
Excuse me for my English.
I need to create a class that could subscribe to change DependencyProperty, and depending on the new value of this property to perform some action.
Like this:
MyClass obj = new MyClass();
obj.Subscribe(TextBox.TextProperty, myTextBox);
How can I do this?
回答1:
Here is one way of doing it, using the handy DependencyPropertyDescriptor class.
var pd = DependencyPropertyDescriptor.FromProperty(TextBox.TextProperty, typeof(TextBox));
pd.AddValueChanged(myTextBox, OnTextChanged);
private void OnTextChanged(object sender, EventArgs e)
{
...
}
回答2:
Take a look at this article. http://msdn.microsoft.com/en-us/magazine/cc794276.aspx#id0070111. It shows how to use DPDescriptor to get changed events
来源：https://stackoverflow.com/questions/8482923/how-to-subscribe-to-change-dependencyproperty