How to apply Conditional filtering on DataView webpart.
When there is value in parameter filter the data , when there is no value do not apply filter.
Scenario: We have intranet portal developed in the sharepoint 2010, Now we are adding classified functanality in portal, for that we have created one list, now on one page we are adding Dataview list webpart to show all classifieds, and we want to give serach box facility to serach particular item, for that we have added textfilter webpart, however it filtering on "Exact text manner" which we do not want , So we created Paramerer , Now text filter will send value to Parameter, and Parameter will consumed by dataview webpart for filtering, This is working fine as expected, howver when there in no text in text box it shoows no item in datview webpart, we are expecting to show all values. So for this how to apply conitional formating to Webpart.
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