Question

AJAX + Web Part design mode = unable to move web part

Asked by: tmueller18

When i introduce AJAX to my web parts I am unable to move my webparts around in design mode. Its like the surface to drag has disappeared. When i remove the ajax it works find.. i am able to grab the web part and move it.



Anyone run across this?

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Asked On
2007-09-21 at 14:15:02ID22845397
Tags

ajax

,

webpart

,

web

,

move

,

parts

Topic

Programming for ASP.NET

Participating Experts
1
Points
500
Comments
7

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Answers

 

by: daniel_ballaPosted on 2007-09-21 at 15:56:46ID: 19939746

Make sure that the web parts (the WebPartManager and WebPartZones) are not wrapped in an update panel. That will not work (not in asp.net ajax 1.0).
However, you can have update panels in the webparts instead, therefore you can update the contents of the web part without a postback.

Cheers,
Dan

 

by: tmueller18Posted on 2007-09-21 at 16:05:53ID: 19939773

so the move part doesnt work if wrapped inside an update panel?



Can i do soemthing like this?

<ZoneTemplate>
                        <asp:UpdatePanel>
                        <ContentTemplate>
                              <uc1:StatusHistory Title="Status History" ID="StatusHistory" runat="server" />
                        </ContentTemplate>
                  </asp:UpdatePanel>
</ZoneTemplate>

or does it have to be inside the control 'StatusHistroy'?

 

by: daniel_ballaPosted on 2007-09-22 at 02:49:16ID: 19941063

That should be fine.

 

by: daniel_ballaPosted on 2007-09-22 at 02:51:21ID: 19941065

Either way, for performance's sake you shouldn't wrap all your content in update panels. You should only wrap the bits and pieces that you really need to update without a postback, and ideally you would set the update panel update mode to conditional and set the correct triggers.

 

by: tmueller18Posted on 2007-09-22 at 18:29:43ID: 19943171

mainly there will be gridviews in the controls. How can i specify the gridviews as triggers?



 

by: daniel_ballaPosted on 2007-09-23 at 02:22:50ID: 19943868

fair enough, if you have gridviews you don't specify the triggers, but in that case make the update mode conditional and leave the ChildrenAsTriggers as true (that is the default value). This will cause any of its child controls to trigger the update, which is what you want.

 

by: tmueller18Posted on 2007-09-23 at 11:17:23ID: 19944980

cool..thanks for the tips. another question about the web part page.

in my aspx page i have the webpart maanger calling 7 differnet control and within thoose I have 6 gridviews and some other lists.

How can i maximize performance on the loading of this page? Does ever control's page_load get called even if its not displayed? Initially when you hit the page all the webparts are collapsed so ideally the controls wont hit the database to load the grids until someone expands the webpart.

There will be alot of data on this page so performance will be key. Is there a way to 'lazy load' the web parts?

20120131-EE-VQP-002

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