I was working on a data view web part recently and i had to filter the data based on dates.Since the data source was web services i couldn't use the Offset which i blogged about earlier.When using web services to pull data in sharepoint designer you would have to use xpath.So for example this is the soap that populates the rows<xsl:variable name="Rows" select="/soap:Envelope/soap... you would need to add some ......