custom datatype with updatapanel

Jeroen Breuer 4861 posts 12138 karma points MVP 3x admin c-trib

Sep 29, 2009 @ 13:27

Custom Datatype with UpdataPanel

Hello,

I'm trying to create a custom datatype which has some buttons. Because these buttons are causing postbacks I would like to place an UpdatePanel around my datatype. How can I do this? I created a datatype as described at Tim's blog (http://www.nibble.be/?p=50) except that I also override the Render of the actual datatype dataeditor. On the OnInit I tried the following, but it did not help:

_updatePanelContent = new UpdatePanel ();
_updatePanelContent.ContentTemplateContainer.Controls.Add(_btnKoppel);
_updatePanelContent.ContentTemplateContainer.Controls.Add(_btnRemove);
_updatePanelContent.ContentTemplateContainer.Controls.Add(_btnUp);
_updatePanelContent.ContentTemplateContainer.Controls.Add(_btnDown);
_updatePanelContent.ContentTemplateContainer.Controls.Add(_listboxBeschikbaar);
_updatePanelContent.ContentTemplateContainer.Controls.Add(_listboxGeselecteerd);
 base.ContentTemplateContainer.Controls.Add(_updatePanelContent);

My render controls looks as following:

 protected override void Render(HtmlTextWriter writer)
        {
            writer.Write("<table><tr><td>Beschikbare items</td><td></td><td>Geselecteerde items</td><td></td></tr><tr><td>");
            _listboxBeschikbaar.RenderControl(writer);
            writer.Write("</td><td>");
            _btnKoppel.RenderControl(writer);
            writer.Write("<br />");
            _btnRemove.RenderControl(writer);
            writer.Write("</td><td>");
            writer.Write("<table><tr><td>");
            _listboxGeselecteerd.RenderControl(writer);
            writer.Write("</td><td>");
            _btnUp.RenderControl(writer);
            writer.Write("<br />");
            _btnDown.RenderControl(writer);
            writer.Write("</td></tr></table>");
            writer.Write("</td></tr></table>"); }

Does anyone know how I can solve this?

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Tim Geyssens 6562 posts 15373 karma points MVP 2x c-trib

Sep 29, 2009 @ 13:32

Hi Jeroen,

This is actually quite simple.

As you can see in my example the editor inherits from UpdatePanel, so all your controls are allready in an updatepanel.

public class charLimitDataEditor : System.Web.UI.UpdatePanel, umbraco.interfaces.IDataEditor

But if I remember correct you will need to set an ID for each control in order to get the behavioir you want

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Jeroen Breuer 4861 posts 12138 karma points MVP 3x admin c-trib

Sep 29, 2009 @ 13:44

I see you are right :). When I remove the Render method the code works! Now my Onit looks like:

            base.ContentTemplateContainer.Controls.Add(_btnKoppel);
            base.ContentTemplateContainer.Controls.Add(_btnUp);
            base.ContentTemplateContainer.Controls.Add(_btnDown);
            base.ContentTemplateContainer.Controls.Add(_btnRemove);
            base.ContentTemplateContainer.Controls.Add(_listboxBeschikbaar);
            base.ContentTemplateContainer.Controls.Add(_listboxGeselecteerd);

If I use the render method the updatepanel doesn't work. Is there a way I can control my output and use an UpdatePanel. Thanks already!

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Jeroen Breuer 4861 posts 12138 karma points MVP 3x admin c-trib

Sep 29, 2009 @ 13:56

I now solved it by putting the next code in the OnInit:

            base.ContentTemplateContainer.Controls.Add(new LiteralControl("<table><tr><td>Beschikbare items</td><td></td><td>Geselecteerde items</td><td></td></tr><tr><td>"));
            base.ContentTemplateContainer.Controls.Add(_listboxBeschikbaar);
            base.ContentTemplateContainer.Controls.Add(new LiteralControl("</td><td>"));
            base.ContentTemplateContainer.Controls.Add(_btnKoppel);
            base.ContentTemplateContainer.Controls.Add(new LiteralControl("<br />"));
            base.ContentTemplateContainer.Controls.Add(_btnRemove);
            base.ContentTemplateContainer.Controls.Add(new LiteralControl("</td><td>"));
            base.ContentTemplateContainer.Controls.Add(_listboxGeselecteerd);
            base.ContentTemplateContainer.Controls.Add(new LiteralControl("</td><td>"));
            base.ContentTemplateContainer.Controls.Add(_btnUp);
            base.ContentTemplateContainer.Controls.Add(new LiteralControl("<br />"));
            base.ContentTemplateContainer.Controls.Add(_btnDown);
            base.ContentTemplateContainer.Controls.Add(new LiteralControl("</td></tr></table>"));

It's a bit dirty, but it works.

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Tim Geyssens 6562 posts 15373 karma points MVP 2x c-trib

Sep 29, 2009 @ 14:17

Hi Jeroen,

I think you'll need to move to RenderChildren instead of Render

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Jeroen Breuer 4861 posts 12138 karma points MVP 3x admin c-trib

Sep 29, 2009 @ 14:52

RenderChildren works better then Render, but other datatypes still refresh when I cause a postback. This is not the case when put all my code in the OnInit. So far that's the best solution.

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Jeroen Breuer 4861 posts 12138 karma points MVP 3x admin c-trib

Oct 05, 2009 @ 13:57

I've got another problem using the OnInit. On some pages it renders an error because of the html I put in the LiterControl. When I use RenderChildren this problem does not occur, but I still have the ajax problems. It stil makes a complete postback instead of an ajax postback. When I have a page with a scrollbar the page goes to the top because of the postback which is very annoying. There should be a normal way doing an ajax postback without using the OnInit. Hope someone can help.

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Custom Datatype with UpdataPanel