How can I detect which control was clicked?

[needin4mation]

Hi, I have two links, one function. Both links are wired via the
onclick to the same function.

I want to test in the function which link was clicked and code
accordingly. How?

I have looked around on google groups and could not find it.

Any help is appreciated.

<td><asp:LinkButton id="LinkButton1" runat="server"
OnClick="LinkButton2_Click1">previous</asp:LinkButton>

<asp:LinkButton id="LinkButton2" runat="server"
OnClick="LinkButton2_Click1">next</asp:LinkButton></td>

protected void LinkButton2_Click1(object sender, EventArgs e)
{
how can I tell which link clicked me?
}

Thank you again for any help.

 

[Klaus H. Probst]

(e-mail address removed) wrote in @i40g2000cwc.googlegroups.com:

Hi, I have two links, one function. Both links are wired via the
onclick to the same function.

I want to test in the function which link was clicked and code
accordingly. How?

The 'sender' parameter in the handler delegate is a reference to the
control that initiated the event. So if you have a reference to the link
control itself at the page level, i.e.:

protected System.Web.UI.WebControl.Hyperlink Link1;

Then you can do this:

private void OnLinkClick(object sender, ...) {
if (sender == Link1) {
...
}
else if (sender == Link2) {
...
}
}

and so on.

 

[andrew]

I'm not exactly sure what the advantages of using the OnCommand event
vs the OnClick event, that maybe soemthing someone else could explain
or i could look up. In any case if you hook up the onCommand event you
can pass arguments and command name in the eventargs for a command.
This can help determining where the click originated from quite easily.

http://msdn2.microsoft.com/en-us/library/system.web.ui.webcontrols.linkbutton.oncommand.aspx