如何检查UpdatePanel是否回发？

我不知道这是否会比您的解决方案更好，但是您是否尝试过？

if (scriptManager.GetCurrent(Page).IsInAsyncPostBack){    Control ctrl = GetControlThatCausedPostBack(Page);    if (ctrl is UpdatePanel)    {        //handle updatepanel postback    }}private Control GetControlThatCausedPostBack(Page page){    //initialize a control and set it to null    Control ctrl = null;    //get the event target name and find the control    string ctrlName = Page.Request.Params.Get("__EVENTTARGET");    if (!String.IsNullOrEmpty(ctrlName))        ctrl = page.FindControl(ctrlName);    //return the control to the calling method    return ctrl;}