https://www.infopathdev.com:443/forums/39.aspxNew to InfoPath? Search to see if your question has already been answered. If it has not, then ask it here or the appropriate topic forum.enCommunityServer 2007 SP3 (Build: 31118.962)https://www.infopathdev.com:443/forums/thread/93578.aspxWed, 09 Oct 2013 19:14:40 GMT033a2e2d-04e2-4a9d-be01-a4634161eefd:93578kpargao0https://www.infopathdev.com:443/forums/thread/93578.aspxhttps://www.infopathdev.com:443/forums/commentrss.aspx?SectionID=39&PostID=93578<p>Hi,</p> <p>I have a multiple selection list box which is taking data from sharepoint list and I am filtering the data before populating it to list box. I have few cases where there will be no entry&#39;s showing up the list box because after filtering there will be no data in the list to show.</p> <p>Ex: I have list with Application Name and Sub-Application Name. Each Application can have multiple sub-apps or&nbsp;in cases&nbsp;may not have one as well.&nbsp;I want to populate Sub-Applications for each Application by filtering on Application Name(comparing it to Application Name field already on Form). So in few case there may not be any field populating on the list box.</p> <p>I want to know how can I check if&nbsp;there is any field populated or not and can&nbsp;make the field mandatory or non-mandatory.&nbsp;</p> <p>&nbsp;</p>