Why templating the content of the UpdatePanel?

Many ASP controls use template for their content (theGridView being a good example). TheUpdatePanel has aContentTemplate property that, as the name suggests, contains the content of the UpdatePanel.

Yet, since the UpdatePanel is not a repeater control, I do not grasp (as a consumer of the ATLAS library) the interest of templating the content of the UpdatePanel. Does some has an idea why a ContentTemplate is used instead of the regular control children?

Thanks in advance,
Joannès
http://www.peoplewords.com

hello.

i'd say that a template let's you have complete control over the content of the updatepanel. if you had a property of another type, you'd only be able to use elements of that type (or of a derived type)

ThePlaceHolder is not templated and but can include any element (as long as they inheritControl which is not a real constraint). My question can maybe be rephrased as "Why did the UpdatePanel not follow the PlaceHolder design pattern?".

Joannès

hum...how about designer integration? i'm not sure because i really don't use the designer, but can you drag-n-drop controls from the toolbox into a placeholder control?

Why?

Why is it that the example below works just fine, but if I move the updatepanel anywhere else, it stops working? It won't work if I put it directly below the asp:Panel. It won't work if I put it inside the <table>... Is there some rule I should be following here for where an updatepanel should be placed?

<asp:Panel ID="pnlOptions2" runat="server"> <tr> <td valign="top"><strong>Additional Options</strong></td> <td colspan="2"> <asp:UpdatePanel ID="upOptions2" runat="Server"> <ContentTemplate> <table cellpadding="0" cellspacing="0" width="650"> <tr> <td width="175"><asp:CheckBox ID="cbTransparencies" runat="server" Checked="false" AutoPostBack="true" />Transparencies</td> <td width="125"><asp:CheckBox ID="cbLetter" runat="server" checked="false" AutoPostBack="true" />Letter</td> <td width="175"><asp:CheckBox ID="cb11x171" runat="server" checked="false" AutoPostBack="true" />11x17 1's</td> <td width="175"><asp:CheckBox ID="cbPaper" runat="Server" checked="false" AutoPostBack="true" />Provided Paper</td> </tr> <tr> <td><asp:CheckBox ID="cbNCR2" runat="Server" checked="false" AutoPostBack="true" />2 part NCR</td> <td><asp:CheckBox ID="cbLabels" runat="server" checked="false" AutoPostBack="true" />Labels</td> <td><asp:CheckBox ID="cb11x172" runat="server" checked="false" AutoPostBack="true" />11x17 2's</td> <td><asp:CheckBox ID="cbLaminate" runat="server" checked="false" AutoPostBack="true" />Laminate</td> </tr> <tr> <td><asp:CheckBox ID="cbNCR3" runat="Server" checked="false" AutoPostBack="true" />3 part NCR</td> <td><asp:CheckBox ID="cbTabs" runat="server" checked="false" AutoPostBack="true" />Tabs</td> <td><asp:CheckBox ID="cbCards" runat="server" checked="false" AutoPostBack="true" />Business Cards</td> </tr> <tr> <td><asp:CheckBox ID="cbNCR4" runat="Server" checked="false" AutoPostBack="true" />4 part NCR</td> <td><asp:CheckBox ID="cbCerts" runat="server" checked="false" AutoPostBack="true" />Certs</td> <td><asp:CheckBox ID="cbBrochures" runat="server" checked="false" AutoPostBack="true" />Brochures</td> </tr> </table> </ContentTemplate> </asp:UpdatePanel> </td> </tr> </asp:Panel>

The UpdatePanel prefer to work within a DIV or a SPAN object. Try setting the RenderMode property of the UpdatePanel toInline

See it here for RenderMode property, try to set it

http://www.asp.net/AJAX/Documentation/Live/mref/P_System_Web_UI_UpdatePanel_RenderMode.aspx

See for most common problem of UpdatePanel

http://blogs.visoftinc.com/archive/2007/09/23/asp.net-ajax--updatepanel-not-working--common-problems.aspx

wierd behavior on submit button (partial postback acting as full postback randomly)

I setup this example from here, but I am getting some weird behaviour.

First off I was getting the pretty famous popup error of "unknown error" I was able to fix this by adding

<xhtmlConformancemode="Transitional"/>

to the web.config.

Right now the weird error that I am experiencing however is when I do a partial postback, the button actually does a full postback the first time, then after that it turns to partial post backs. This behaviour isn't always consistent, sometimes it takes 10 postbacks before it starts working as a proper AJAX partial postback.

Doesn't make any sense to me ?

Any one got an idea on this one? I copied the source directly from here, its very straightforward.

article

I have the same behavior. But I think in my case it is because I'm running vista RC1

If I clear my temporary internet files it seems to work ok for a while tho

I'm still running windows 2000 and its messing up, so I don't think it has anything to do with that.

At first clearing temp files seemed to help, but now it doesn't. It's so erratic that I can't come up with any possible ideas right now.

Anyone else experiencing this?

Thanks,

mike123