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CHAPTER 5 EVOLVING THE DEFAULT USER EXPERIENCE
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to a list or library. Remember to reverse your changes, though, because Microsoft Support will eat your head if you modify any default files, as you know. Here s another example, which is a bit more complex this time: <SharePoint:RenderingTemplate ID="NewFormToolBar" runat="server"> <Template> <wssuc:ToolBar CssClass="ms-toolbar" id="toolBarTbl" RightButtonSeparator=" " runat="server"> <Template_Buttons> <SharePoint:AttachmentButton runat="server"/> </Template_Buttons> </wssuc:ToolBar> </Template> </SharePoint:RenderingTemplate> The NewFormToolBar template references a ToolBar control from the wssuc tag prefix, which, as you can see at the top of the DefaultTemplates.ascx file, is mapped to the ToolBar.ascx control, also residing in the [12]\TEMPLATE\CONTROLTEMPLATES folder. Notice that the ToolBar tag has a child element of AttachmentButton. Now open the ToolBar.ascx file: <table class="<%=CssClass%>" cellpadding="2" cellspacing="0" border="0" id="<%=ClientID%>" width="100%" > <tr> <%-- Buttons on the left --%> <wssawc:RepeatedControls id="RptControls" runat="server"> <HeaderHtml/> <BeforeControlHtml> <td class="ms-toolbar" nowrap="true"> </BeforeControlHtml> <AfterControlHtml> </td> </AfterControlHtml> <SeparatorHtml> <td class=ms-separator>|</td> </SeparatorHtml> <FooterHtml/> </wssawc:RepeatedControls> <td width="99%" class="ms-toolbar" nowrap> <IMG SRC="/_layouts/images/blank.gif" width=1 height=18 alt=""> </td> <%-- Buttons on the right --%> <wssawc:RepeatedControls id="RightRptControls" runat="server"> <HeaderHtml/> <BeforeControlHtml> <td class="ms-toolbar" nowrap="true"> </BeforeControlHtml> <AfterControlHtml> </td> </AfterControlHtml>
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CHAPTER 5 EVOLVING THE DEFAULT USER EXPERIENCE
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<SeparatorHtml> <td class=ms-separator>|</td> </SeparatorHtml> <FooterHtml/> </wssawc:RepeatedControls> </tr> </table>
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Note I have left out the directives at the top of the file to save space.
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This file, along with its calling rendering template, is responsible for creating the toolbars that appear over the NewForm, EditForm, and DisplayForm forms (see Figure 5-14).
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Figure 5-14. Result of ToolBar.ascx in NewFormToolbar. Don t mind the list and item names. I will suspend the mindless listing of code now; I just wanted to give you a few illustrative examples.
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Manipulating the Control Templates
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How does any of this help you Again, you are faced with the agony of not being able to modify any default files. To the rescue comes the ability to overload any rendering template using a seemingly simple technique. You can override each of the templates in DefaultTemplates.ascx by creating another .ascx file and putting that file in the CONTROLTEMPLATES folder. In the custom .ascx file, you add SharePoint:RenderingTemplate tags using the same Id as the template you want to override. A simple iisreset later, and you have changed which template is actually used to render a user interface element. Take a look at the following code to see an example of overriding the TextField rendering template (Figure 5-15 shows the result): <SharePoint:RenderingTemplate ID="TextField" runat="server"> <Template>
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CHAPTER 5 EVOLVING THE DEFAULT USER EXPERIENCE
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<asp:TextBox BorderStyle="none" BorderWidth="0" ID="TextField" MaxLength="255" runat="server"/><br> </Template> </SharePoint:RenderingTemplate>
Figure 5-15. Result of overriding TextField. Notice the lack of borders on the text box.
Get to know the DefaultTemplates.ascx file in more detail; there is gold to be had when you learn Tip
where each user interface element gets created.
This is all fine and dandy, but there are some troublesome catches here. First, you can override any template only once. If you attempt to override with a second .ascx file, only one of the overriding templates will take effect. Second, the override is global, just like any addition to the [12]\TEMPLATE folder. That means there is no scope for a template override, so if you override TextField, you should be prepared to see the effects on every site in every site collection. This may or may not be what you want; just be aware of these caveats, and you should be fine. If you are looking to modify only a single text field column, you will likely be much better off creating a new field and rendering it the way you want. 9 details fields and columns.
CHAPTER 5 EVOLVING THE DEFAULT USER EXPERIENCE
Using Feature Stapling
Please take a moment and stare into my eyes. You will become sleepy; your eyes will become heavy. Listen to my voice as you slip away into a state of hypnosis. When I snap my fingers, you will wake up. Features are great. Features are good. Love features. Features are your friends. You want to use features. *Snap!* Good morning, sunshine! (Features are great.) It s time to move on to the next part of this chapter (features are great) that will focus on a wonderful method for modifying the default user experience (features are great). If you feel a strong urge to use features, then you are indeed a wise developer. Features offer you the best method of adding functionality to a site. The problem, however, is that if you want to add features to an existing site definition, such as the Team Site definition, you are out of luck. Sure, you can add, install, and activate features after the site has been created, but you cannot modify the site definition itself, both because Microsoft Support will have you flogged but more important because modifying a site definition after a site has been created from the definition is not supported.
Microsoft KB article 898631 details the supported and unsupported methods of modifying site definiTip
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