I followed these instructions and created a Web Part Page and filled it with a Text Filter Web Part and a SP Designer 2010 Data View. The result is I've not got a page where I can filter a list based on a wildcard text parameter. Great!
However, I cannot seem to get the list to display everything (unfiltered) by default. No parameter entered = no results returned apparently. How can I make it that, when a user opens the page and no parameters are entered, the entire list is shown?
My (so far unsuccesful) guess is that I need to add a second OR filter with a rule that's always valid (for instance, a required field that is not null - this is always the case obviously). But no luck so far. Any ideas?