How best to dynamically set the Page Title based on a DataSource?

IfEmpty(Eval("Field Name", "Not Found", Eval("Field Name"))

Put that in the body of the transformation. Best way to do this.

If you're talking about the page title you'd see in the tab of the page or the browser's title, you can use a macro in the pages metadata tab although I don't believe you will get access specifically to that datasource's count values. You do have access to CurrentDocument.DocumentName and fields within the DataSource if you use CurrentDocument.GetValue("ColumnName"). Then you can check for null or empty string and replace it with Not Found.

Regarding the server-side script tag, that would be an OK way to handle it since you'd only have 0 or 1 record. If you had more than one record, I'd recommend not doing it.

Sorry, yes, I was referring to the page title as it appears in the browser (i.e. the <title> tag -- although what I really want to modify is only the DocumentPageTitle, because I want the system to still honor my "Page title format" setting I have set for the site in Settings -> Content.)

What I was hoping for was maybe a macro I can use in the "Page title" field of the Metadata tab for the document. For example, something along the lines of:

{% CurrentDocument["MyDataSource"].Items.Count == 1 ? CurrentDocument["MyDataSource"].Items[0].DisplayName : "Not found" |(identity)GlobalAdministrator%}

But that only works because the profile loaded into MembershipContext.CurrentUserProfile is hard-coded to look for a userid, username, or userguid supplied in the query string. It's very specific to showing user profiles.

So I certainly could write some custom code that works similarly to MembershipContext.CurrentUserProfile, but I was really hoping for a more generic solution that could be employed for any DataSource, because I anticipate this being something I'll need to do more in the future, and I didn't want to have to rely on writing custom code for each and every single situation like this.

Using the transformation to handle this just doesn't seem to be the correct solution. That seems totally out of the scope of what a transformation does or should do, and could lead to confusing behavior if someone working with it in the future doesn't just happen to know that it will change the page title (and they likely won't). If there's no out-of-the-box solution for this type of thing, I think I'll probably just create a custom web part that can change the page the title based on a DataSource -- that's much more explicit, and could still be used without writing custom code each time.

Hi,

You can make your data source to add the value into the query string parameter of the URL. Then, in the page metadata tab you can use query string macro to read this value and it will be displayed as the page title. It is similar to the profile you mentioned. the user profile page has a wild card URL which is basically a query string parameter that is read and used to fill out the page title.

Best regards,
Juraj Ondrus