Step 3: Adding Field-Level Validation to the DataRow classes.

第三步：给DataRow添加字段级验证。

youdao

To see the existing field-level validation automatically provided, go to the DataSet Designer, select a field from one of the DataTables and then go to the Properties window.

我们可以在数据集设计器(DataSet Designer)中看到已经存在的字段级验证，从某个DataTable中选择一个字段，然后在属性窗口中就可以找到了。

youdao

To see the existing field-level validation automatically provided, go to the DataSet Designer, select a field from one of the DataTables and then go to the Properties window.

我们可以在数据集设计器(DataSet Designer)中看到已经存在的字段级验证，从某个DataTable中选择一个字段，然后在属性窗口中就可以找到了。

youdao