ASP.NET postback with jQuery?

Question

I have a ASP.NET button but recently, I replaced it with a standard HTML button ... What I need to do is a postback to an ASP.NET page and ensure a method is called.

The previous button was an ASP.NET button, so I had this event:

Protected Sub btnCancelar_Click(ByVal sender As Object, ByVal e As System.EventArgs) 
    UtilTMP.DisposeObjects()
    Server.Transfer("~\Forms\test.aspx", True)
End 

But I was using a button with a JavaScript ALERT and I recently changed to a jQuery UI Modal dialog but it doesn't wait for me to answer the question.. the postback happenes immediatly ... so I decided to change to a standard HTML button ... but I need to postback to the ASP.NET page and call a method like.

If I just postback it won't call the cleanup

Protected Sub Cleanup()
    UtilTMP.DisposeObjects()
    Server.Transfer("~\Forms\test.aspx", True)
End 

Answer 1

See if this helps: http://www.codeproject.com/KB/aspnet/sample.aspx.

Basically, you declare a dummy anchor tag:

<a id="anchorId" runat="server" onclick="return true" onserverclick="foo"></a> 

In your code behind, you need to declare a foo method:

protected void foo(object sender, EventArgs e)
{
    // Do something here
}

Then you can invoke this anchor's onclick function with this javascript:

document.getElementById('anchorId').click()

Answer 2

While you can do Postbacks with JQuery, it might be better to call a web method (web service that is in your page). The call could also be faster because you are not posting the entire page ViewState.