Full postback triggered by LinkButton inside GridView inside UpdatePanel

Question

I have a GridView inside of a UpdatePanel. In a template field is a button I use for marking items. Functionally, this works fine, but the button always triggers a full page

Answer 1

My grid view is in conditional mode.

protected void gvAgendamentoExclui_RowDataBound(object sender, GridViewRowEventArgs e)
    {
        if (e.Row.RowType == DataControlRowType.DataRow) {
            LinkButton lnk = e.Row.FindControl("LinkButton2") as LinkButton;
            AsyncPostBackTrigger trigger = new AsyncPostBackTrigger();
            trigger.ControlID = lnk.UniqueID;
            trigger.EventName = "Click";
            UpdatePanel2.Triggers.Add(trigger);

        }
    }

And in the click event of the linkbutton I put:

protected void LinkButton2_Click(object sender, EventArgs e)
    {
        UpdatePanel2.Update();
    }