gridview on edit event , on update event?

Question

I would like to know how I can access the edit and the update button from GridView ?
I mean, if I click the edit button from the website in the GridView , I want to get some values from the tables.
For example: the button1 event.

Answer 1

You could make use of the GridView rowupdating event.

protected void myGridView_RowUpdating(object sender, GridViewUpdateEventArgs e)

The GridViewUpdateEventArgs contain properties for NewValues and OldValues .

I often use the following to cancel the update if nothing has actually been changed.

foreach (DictionaryEntry d in e.NewValues)
{
    String oldValue = e.OldValues[d.Key] == null ? "" : e.OldValues[d.Key].ToString();
    String newValue = d.Value == null ? "" : d.Value.ToString();
    if (oldValue != newValue)
    {                    
        return; // -- change detected
    }
}
e.Cancel = true; // -- don't execute the update
myGridView.EditIndex = -1;

Answer 2

1. Use a rowCommand on your button in template field
2. Check for your command name under rowCommand event
3. Open a database connection & execute SQL/stored procedure to fetch your records

Also if you use a SQLDataSource, it can automatically do it for you if you specify right queries.