第一列不绑定数据就可以了吧
<sdk:DataGrid.Columns>
<sdk:DataGridTemplateColumn Header="操作">
<sdk:DataGridTemplateColumn.CellTemplate >
<DataTemplate>
<StackPanel Orientation="Horizontal">
<Button Content="删除" x:Name="btnDelete" Click="btnDelete_Click" Width="40" Height="20"></Button>
<Button Content="更新" x:Name="btnUpdate" Click="btnUpdate_Click" Width="40" Height="20"></Button>
</StackPanel>
</DataTemplate>
</sdk:DataGridTemplateColumn.CellTemplate>
</sdk:DataGridTemplateColumn>
<sdk:DataGridTemplateColumn Header="编号" Visibility="Collapsed" >
<sdk:DataGridTemplateColumn.CellTemplate >
<DataTemplate>
<TextBlock x:Name="id" Text="{Binding id}" ></TextBlock>
</DataTemplate>
</sdk:DataGridTemplateColumn.CellTemplate>
</sdk:DataGridTemplateColumn>
</sdk:DataGrid.Columns>