Jquery - Pass asp button command argument with jquery

Question

I have asp button:

Answer 1

CommandArgument is completely a server-side property and doesn't render any html attribute. So you can't change any button's attribute and fire click on it. The good news is that you can fire postback with client-side __doPostBack function and pass your custom value as second parameter:

And you can get passed argument in server click handler from the Request.Form collection:

protected void button_click(object sender, EventArgs e)
{
    var argument = Request.Form["__EVENTARGUMENT"];
}

If script above won't work then maybe __doPostBack function not defined on page. In this case add this code to Page_PreRender method: ClientScript.GetPostBackEventReference(btn1, string.Empty); this will force page to define __doPostBack method on page.