https://www.infopathdev.com:443/forums/45.aspxenCommunityServer 2007 SP3 (Build: 31118.962)https://www.infopathdev.com:443/forums/thread/103534.aspxWed, 05 Aug 2015 08:30:59 GMT033a2e2d-04e2-4a9d-be01-a4634161eefd:103534Buddhini0https://www.infopathdev.com:443/forums/thread/103534.aspxhttps://www.infopathdev.com:443/forums/commentrss.aspx?SectionID=45&PostID=103534Hi All, I have used FileQueryConnection for update the data connection withing code behind in InfoPath 2007. FileQueryConnection dataConnection = (FileQueryConnection)DataConnections["DataConnectionFileName"]; dataConnection.FileLocation = GetFileLocation(); // Get and set the file location for update the data source dataConnection.Execute(); This code worked properly in InfoPath 2007. But now I have migrate my form in to InfoPath 2013. But with the code excecution of infopath 2013 this will endup with the below exception. Exception : Unable to cast object of type 'Microsoft.Office.InfoPath.Server.DocumentLifetime.DataAdapterListDataProviderHost' to type 'Microsoft.Office.InfoPath.FileQueryConnection'. Then I have changed the code as below FileQueryConnection dataConnection = (FileQueryConnection)(DataSources["DataConnectionFileName "].QueryConnection); ( Reference : https://msdn.microsoft.com/EN-US/library/office/microsoft.office.infopath.filequeryconnection.aspx ) But in both cases I came-up with the same exception. Exception : Unable to cast object of type 'Microsoft.Office.InfoPath.Server.DocumentLifetime.DataAdapterListDataProviderHost' to type 'Microsoft.Office.InfoPath.FileQueryConnection'. Can you please help me to resolve this issue.