I'm also wanting a drop-down list to return a list of all users so that the person completing my inventory form can browse and select the person responsible for that school/item. I've tried to get this two ways:
1.) I'm not prompted for a sample value when using the "GetUserCollectionFromSite" method in /_vti_bin/UserGroup.asmx?WSDL. When I attempt to use this in a drop down I get the error that I should use a repeating value... SEE ATTACHMENT.
2.) If I use the "GetUserCollection" method I am prompted for sample data for tns:userLoginNamesXml. When I use my user name I get the error that "Data at the root level is invalid. Line 1, position 1." What should I use for my sample data?