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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").
In addition to just displaying data, the Grid View can be used to edit and delete the displayed data as well.
The Grid View comes with a pair of complementary view controls: Details View and Form View.
Kathleen Anderson shows you how to format number fields and telephone numbers, and make URLs and email addresses clickable in an ASP. In Expression Web 4, it’s a fairly simple process to display data from a database on a web page in a gridview (table).