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RowChanging

RowChanging

RowChanging

RowChanging

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You have to create a method to handle the RowChanging event and execute code to hook up the event in the table 's initialization method .

您必须创建一个方法以处理 RowChanging 事件，并在表的初始化方法中执行代码以挂钩该事件。

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Double-clicking the table name (Order Details in the title bar ) creates an event handler for the RowChanging event.

双击表名（标题栏中的 “OrderDetails ”）会创建 RowChanging 事件的事件处理程序。

4

Validate values in whole rows by handling the RowChanging event .

通过处理 RowChanging 事件可验证整行中的值。

5

It is necessary to validate in the RowChanging event when the value in one column relies on the value in another column .

当一列中的值依赖于另一列中的值时，有必要在 RowChanging 事件中进行验证。

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The RowChanging event is raised when the values in all columns are committed .

提交所有列中的值后，将引发 RowChanging 事件。

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Describes how to validate data during the RowChanging event .

描述如何在发生 RowChanging 事件时对数据进行验证。

8

Represents the exception that is thrown when you call the EndEdit method within the RowChanging event .

表示在 RowChanging 事件中调用 EndEdit 方法时引发的异常。

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The exception that is thrown when calling the EndEdit method within the RowChanging event .

当在 RowChanging 事件内调用 EndEdit 方法时引发的异常。

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Validation events (for example , ColumnChanging, RowChanging, and so on ) will not be raised when constraints are turned off .

在约束关闭时，不会引发验证事件（例如，ColumnChanging 、RowChanging 等）。

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