WPF中判断dataGrid的哪一行的checkbox被选中

代码：
<DataGridCheckBoxColumn Header="操作" Width="10*" Binding="{Binding IsChecked}"/>
<DataGridTextColumn Header="id" Width="10*" Binding="{Binding Path=ui_id, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" Visibility="Hidden"/>
<DataGridTextColumn Header="工号" Width="12*" Binding="{Binding Path=ui_number, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>
<DataGridTextColumn Header="姓名" Width="10*" Binding="{Binding Path=ui_name, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"/>
......
点击【删除】后，如何判断是哪一项呗选中？求指教！！！
后台代码：
int count = dataGrid1.Items.Count;
DataRowView[] drv = new DataRowView[count];
DataTable dt = (dataGrid1.ItemsSource as DataView).Table;

for (int i = 0; i < count; i++)
{
drv[i] = dataGrid1.Items[i] as DataRowView;
}本回答被网友采纳