The bast way to track "modified" of a control?

I have a usercontrol which may contain many different kind 开发者_JAVA百科of controls (e.g. button, textbox, combobox or checkbox). I need a generic way to track if anything has been changed. In most cases I don't care about the details (ie I don't need to know which textbox has changed). When I saw EventManager.RegisterClassEvent, I thought this would be my solution, but soon I realize it's not. This problem is that it's fired too much. For example, if I have a button and a combobox in the same control, the button.click event is also fired when I hit the combobox dropdown.

In WinForms, I had to loop through all controls in the usercontrol and subscribe to appropriate event (e.g. TextBox.TextChanged, or ComboBox.SelectedIndexChanged), it's tedious but works. I hope there is a better and easier way to do it in WPF.

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Routed events:

<UserControl x:Class="..." TextBoxBase.TextChanged="UserControl_TextChanged" 
Selector.SelectionChanged="UserControl_SelectionChanged" 
ToggleButton.Checked="UserControl_Checked" 
ButtonBase.Click="UserControl_Click" />

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You can Put this checking to validate the e.source in the UserControl_Click event to handle this

If(e.Source.GetType()==typeof(Button))
{
  // your code
}