当我启动应用程序时,会得到很多这样的信息:
System.Windows.Data Information: 10 : Cannot retrieve value using the binding and
no valid fallback value exists; using default instead.
BindingExpression:Path=Period; DataItem=null; target element is 'TextBlock' (Name='');
target property is 'Text' (type 'String')
System.Windows.Data Information: 10 : Cannot retrieve value using the binding and
no valid fallback value exists; using default instead.
BindingExpression:Path=DocumentId; DataItem=null; target element is 'TextBlock' (Name='');
target property is 'Text' (type 'String')
我需要关注那个输出吗?