Trigger not working for Linkbutton in GridView

I have a linkbutton I'm trying to add a trigger two for two update panels on my aspx page.

I have this but the update panels are not updating... any recommendations?

protected void GridView_ChangeSearchResults_RowDataBound(object sender, GridViewRowEventArgs e) {if (e.Row.RowType == DataControlRowType.DataRow) { LinkButton lb = (LinkButton)e.Row.FindControl("Linkbtn_StaffChangeNew"); AsyncPostBackTrigger trigger =new AsyncPostBackTrigger(); trigger.ControlID = lb.UniqueID.ToString(); trigger.EventName ="Command"; UpdatePanel_Header.Triggers.Add(trigger); UpdatePanel_Info.Triggers.Add(trigger); } }

It doesn't bomb out on me and I've put in a breakpoint and is seems to be adding the triggers but they don't fire for some reason. When I add the triggers in from the GUI I'm using the onlcick event for other button controls on the page.

For this action I am using a command event. I've tried changing the EventName to both Click and Command and neither seem to work. Here is the method for the command event.

protected void ChangeStaffFromGrid(object sender, CommandEventArgs e) {int userStaffID = Convert.ToInt32(bmsUser.CmsStaffID);string budgetyear = Convert.ToString(budgetYear.UserSelectedFiscalYear);

int profileID = Convert.ToInt32(Session["staffProfileID"]);int newProfileID = 0;int newStaffID = Convert.ToInt32(e.CommandArgument);//sets the new staff ID from the selection. Hashtable changeStaffHash =new Hashtable(); changeStaffHash = BmsDLL.ChangeStaff(profileID, newStaffID, userStaffID); newProfileID = Convert.ToInt32(changeStaffHash["newStaffProfileID"]); SetUserSessions("change", newProfileID); SetHeaderInfo(Convert.ToInt32(Session["staffProfileID"])); SetNewProfileIDItems(Convert.ToInt32(Session["staffProfileID"])); }

The two methods that update the two pannels are SetHeaderInfo and SetUserSessions.

Thanks for your help.

Use ScriptManager1.RegisterAsyncPostBackControl(YourLinkButton) instead of creating AsyncTrigger. then in the button command event update your update panels by calling the update.

I've just recenlty started using Ajax in my app, do you have a code example of your suggestion?

Which even would I add ScriptManager1.RegisterAsyncPostBackControl(YourLinkButton) ? In the rowdatabound event?

Try the following code:

protected void GridView_ChangeSearchResults_RowDataBound(object sender, GridViewRowEventArgs e){if (e.Row.RowType == DataControlRowType.DataRow) { LinkButton lb = (LinkButton)e.Row.FindControl("Linkbtn_StaffChangeNew");ScriptManager1.RegisterAsyncPostBackControl(lb);// Assuming the ScriptManager name in your page is ScriptManager1 }}

That didn't work. The same updates to the panels are working with regular buttons. This makes no sense.

Hi,

As far as I know,You can add anUpdatePanel control programmatically, but you cannot add triggers programmatically. To create trigger-like behavior, you can register a control on the page as an asynchronous postback control. You do this by calling theRegisterAsyncPostBackControl(Control) method of theScriptManager control. You can then create an event handler that runs in response to the asynchronous postback, and in the handler, call theUpdate() method of theUpdatePanel control.

For more information,seehttp://www.asp.net/AJAX/Documentation/Live/mref/T_System_Web_UI_UpdatePanel.aspx

IfRegisterAsyncPostBackControl(Control) method & Update() method doesn't work, there must be something wrong in your code.You can post some code so we can check out where is the error.

Best Regards

It seems the Update() method is working for me. Thanks for your help.