Si se define del tipo Link y se quiere cambiar el texto, se usaría la propiedad “Select Text”.
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A Grid View Update Event Args object is passed to the event-handling method, which enables you to determine the index of the current row and to indicate that the update operation should be canceled.
To cancel the update operation, set the collections, if necessary, before the values are passed to the data source.
Take a look at the page load if you are binding on post back then the values get updated before you are able to access them.
Follow this link for more details --While this link may answer the question, it is better to include the essential parts of the answer here and provide the link for reference.
Save all or press "Ctrl S" and hit "F5" to run the page, the page will look as in the following image: Click on "Edit the Grid View", it will display Textboxes in each cell as in the following image: Edit the value(s) here and click on the Update link, it will update all the data or to remove it click on the "Delete" link above the image shown.
One note will be helpful for you, while describing Columns in Grid View if you are using a boundfield then create objects of the control using cells[index] in the rowupdateing event of Grid View, but if you are using controls itself like Label or textboxes etc then use Fincontrol("stringid").
Para este caso usaremos un comando del tipo Image, por lo tanto se deberá definir la propiedad “Select Image Url”.Para este caso en particular se agregara solo la opción de selección.Mediante las flechas laterales se puede posicionar el comando.A Grid View Updated Event Args object is passed to the event-handling method, which enables you to determine the number of rows affected and any exceptions that might have occurred. You can also indicate whether the exception was handled in the event-handling method by setting the On Row Updated Row Canceling Edit On Row Canceling Edit Row Deleted On Row Deleted Row Deleting On Row Deleting Row Editing On Row Editing Row Updating On Row Updating Grid View Class System. event is raised when a row's Update button is clicked, but before the Grid View control updates the row.