WPF-如何将所选项目从数据网格加载到ObservableCollection类型

Question

ObservableStudent selected = datagrid.SelectedItem as ObservableStudent;

selected is null after this line is executed. 执行此行后， selected为null 。 What is the reason behind this? 这背后的原因是什么？

Answer 1

you must instantiate the collection in the class constructor. 您必须在类构造函数中实例化集合。 and then it should work fine. 然后它应该可以正常工作。