Datagridview cell validation on focus out

Question

我的表单中有一个datagridview，如何在离开当前行时验证单元格。

Answer 1

在更改的每个选定索引上，保存当前索引，但是在保存之前，只需从上一个选定行中获取数据并进行验证即可。

Answer 2

Here's an answer for Windows Forms (the question is tagged ASP.NET but as far as I know there is no such thing as a DataGridView for the web):

Handle the RowValidating event and validate the row there. If the row's values are invalid, set the error message in the ErrorText property of the row, and set e.Cancel = True .

Finally in the RowValidated event, set the row's ErrorText property to an empty string.