I resolved this issue myself; Just in case anybody else runs into the same problem, I'll post it here...
I created a user control and a RadAjaxManager for Ajax support. The RadAjaxLoadingPanel was not showing up on Ajax operations. So I decided to manually show/hide the loading panel by using RadAjaxManager.ClientEvents. However, OnRequestStart and OnResponseEnd were not being triggered for some reason. So I hooked into the Sys.WebForms.PageRequestManager instance and added a listener for beginRequest and endRequest.
So I got that working and tried to show the RadAjaxLoadingPanel. That's when I realized the problem. RadAjax was trying to reference my user control client-side using ClientID. However, I inherit from System.Web.UI.UserControl which does not have a wrapper containing the control ClientID. So there was nothing to reference in the generated HTML. After wrapping my user control in a div with its ClientID, RadAjaxManager.ClientEvents began to throw the OnRequestStart and OnResponseEnd events correctly, and the RadAjaxLoadingPanel worked without additional coding on the client-side.
I don't know if this is the best way, but this is the code I used to resolve this issue:
Hope this helps!
I created a user control and a RadAjaxManager for Ajax support. The RadAjaxLoadingPanel was not showing up on Ajax operations. So I decided to manually show/hide the loading panel by using RadAjaxManager.ClientEvents. However, OnRequestStart and OnResponseEnd were not being triggered for some reason. So I hooked into the Sys.WebForms.PageRequestManager instance and added a listener for beginRequest and endRequest.
So I got that working and tried to show the RadAjaxLoadingPanel. That's when I realized the problem. RadAjax was trying to reference my user control client-side using ClientID. However, I inherit from System.Web.UI.UserControl which does not have a wrapper containing the control ClientID. So there was nothing to reference in the generated HTML. After wrapping my user control in a div with its ClientID, RadAjaxManager.ClientEvents began to throw the OnRequestStart and OnResponseEnd events correctly, and the RadAjaxLoadingPanel worked without additional coding on the client-side.
I don't know if this is the best way, but this is the code I used to resolve this issue:
| Public Overrides Sub RenderControl(ByVal writer As System.Web.UI.HtmlTextWriter) |
| writer.AddAttribute(HtmlTextWriterAttribute.Id, Me.ClientID) |
| writer.RenderBeginTag(HtmlTextWriterTag.Div) |
| MyBase.RenderControl(writer) |
| writer.RenderEndTag() |
| End Sub |
Hope this helps!
1 Answer, 1 is accepted
0
Joe
Top achievements
Rank 2
Rank 2
answered on 07 Nov 2009, 03:24 PM
Thanks Kevin,
Although my situation was a little different, and I couldn't get your solution to work, I thought I would post my scenario and solution here as well...
I have a user control which contains a RadAjaxManager. Apparently client-side events, specifically OnRequestStart and OnResponseEnd, do not work in a user control with RadAjaxManager (As Kevin described).
Since I only really needed to ajaxify one control the solution for me was simply to replace RadAjaxMananger with a RadAjaxPanel and it worked great.
Thanks
Although my situation was a little different, and I couldn't get your solution to work, I thought I would post my scenario and solution here as well...
I have a user control which contains a RadAjaxManager. Apparently client-side events, specifically OnRequestStart and OnResponseEnd, do not work in a user control with RadAjaxManager (As Kevin described).
Since I only really needed to ajaxify one control the solution for me was simply to replace RadAjaxMananger with a RadAjaxPanel and it worked great.
Thanks