Note A common mistake that a lot of people do is that they perform a databind each and every-time the Page_Load method is called.
This will lead to problems like "Grid View does not show updated values", "Grid View looses values changed by user". In your Page_load, this is typically only inside a block where you check to make sure that Page_Load is not being called during a post-back call.
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In this article we create a Gridview from database and add some additional operations such a add, edit and delete data in the Grid View control.
There are multiple ways in which one can get the data from the current row that is being edited in a Grid View. Using "Extract Values From Cell": This is an easy way to get all the values from the current row.
After searching long and hard I found a great article that solved my issue.
The hash key is the key of corresponding column and the value is the new value to be set.
If the values are alternated in the dictionary they are applied to the grid. The hashtable consists of the new values to be set on the row cells.
If the grid contains templated columns or is bound to some of the fields from the data source, the Values and Old Values must be updated to add those missing values.
Otherwise missing cells will be nulled out by the auto update operation. The dictionary consists of the new values to be set on the row's unbound cells.