.NET FRAMEWORK4 WPFAdornerLayer.GetAdornerLayer 为空的解决办法
var adornerLayer = AdornerLayer.GetAdornerLayer(element); 找不到装饰器adornerLayer
手动添加装饰器
<AdornerDecorator Margin="0"> <TextBox Width="200" Height="30" Text="{Binding Name,Mode=TwoWay,UpdateSourceTrigger=PropertyChanged, ValidatesOnExceptions=True, ValidatesOnDataErrors=True, NotifyOnValidationError=True}"></TextBox> </AdornerDecorator>