DataGrid 使用模型列后实现点击列名称排序

代码如下：

 1  <DataGridTemplateColumn Header="型  号"  SortMemberPath="OrderID.Description" CanUserSort="True" >
 2                     <DataGridTemplateColumn.CellTemplate>
 3                         <DataTemplate>
 4                             <TextBox IsReadOnly="True" Text="{Binding OrderID.Description}" BorderThickness="0,0,0,0"></TextBox>
 5                         </DataTemplate>
 6                     </DataGridTemplateColumn.CellTemplate>
 7                 </DataGridTemplateColumn>
 8                 <DataGridTemplateColumn Header="序列号" SortMemberPath="SN" CanUserSort="True" >
 9                     <DataGridTemplateColumn.CellTemplate>
10                         <DataTemplate>
11                             <TextBox IsReadOnly="True" Text="{Binding SN}" BorderThickness="0,0,0,0"></TextBox>
12                         </DataTemplate>
13                     </DataGridTemplateColumn.CellTemplate>
14                 </DataGridTemplateColumn>

实现字段： SortMemberPath="OrderID.Description" CanUserSort="True"