<DataGrid x:Name="dgAdminInfo" MouseLeftButtonUp="dgAdminInfo_MouseLeftButtonUp" DataContext="{Binding}" CanUserAddRows="True" VerticalScrollBarVisibility="Disabled" AutoGenerateColumns="False" >
DataContext绑定了一个IList<T> 怎么没有新行啊,请各位大虾帮帮忙啊