Question

I have a FormView used to edit records but when the user presses the Button, it also needs to do some back-end stuff in the code-behind. For this I need to pass the ID of the record.

Currently this is my code in the page:

<asp:LinkButton ID="savebtn" runat="server" CausesValidation="True"   
                    CommandName="Update" Text="Save Changes" 
                    OnClick="setProcessProgress"  CommandArgument='<%# Eval("id") %>'  />

And this is a stripped-down version of my code-behind:

protected void setProcessProgress(object sender, FormViewCommandEventArgs e)
        {
           if (e.CommandName == "Update")
              ID_p =   Int32.Parse((string)e.CommandArgument);
        }

I’m getting the No overload for 'setProcessProgress' matches delegate 'System.EventHandler'

I tried changing the EventArgs to CommandEventArgs and it didn’t work either.
If I use OnCommand instead of OnClick it just doesn’t call setProcessProgress. Any ideas?

Answer 1

According to the MSDN Documentation on FormViewCommandEventArgs.

The ItemCommand event is raised when a button within the FormView
control is clicked. This allows you to provide an event-handling
method that performs a custom routine whenever this event occurs.

Buttons within a FormView control can also invoke some of the built-in
functionality of the control. To perform one of these operations, set
the CommandName property of a button to one of the values in the
following table.

The event is not assigned to the Button’s OnClick event, it is actually assigned to the FormViews ItemCommand Event

i.e

 <asp:FormView ID="FormView1" runat="server" 
        onitemcommand="setProcessProgress">


<asp:LinkButton ID="savebtn" runat="server" CausesValidation="True"    
                CommandName="Update" Text="Save Changes"  
                CommandArgument='<%# Eval("id") %>'