In MSBuild, all properties (declared in PropertyGroups) work the same way (last one read overrides all previous ones). It is only items (declared in ItemGroups) that accumulate content.
Thus, the pattern in MSBuild used for accumulating properties is usually: <PropertyGroup> <Property>ItemOne</Property> </PropertyGroup> <PropertyGroup> <Property>$(Property);ItemTwo</Property> </PropertyGroup> Or, if you wish to avoid extraneous ";" marks: <PropertyGroup> <Property>ItemOne</Property> </PropertyGroup> <PropertyGroup> <Property Condition=" '$(Property)' == '' ">ItemTwo</Property> <Property Condition=" '$(Property)' != '' ">$(Property);ItemTwo</Property> </PropertyGroup> -Blair -----Original Message----- From: Elfe Xu [mailto:elf...@microsoft.com] Sent: Tuesday, June 22, 2010 5:26 PM To: wix-users@lists.sourceforge.net Subject: Re: [WiX-users] Undefined preprocessor variable error Interesting. Why is the DefineConstants different with other element suche as Property? I have a file MyProj.WIX.targets, which is used by Setupx64.wixproj and Setupx86.wixproj. So I could not have my constants definitation partially in the WIX.targets and partially in the wixproj files, according to whether they are shared or not. Because one of them will get overwritten. Althought currently I don't have such a scenario, but this limitation seems unfriendly to me:( -- View this message in context: http://windows-installer-xml-wix-toolset.687559.n2.nabble.com/Undefined-prep rocessor-variable-error-tp5209950p5211321.html Sent from the wix-users mailing list archive at Nabble.com. ---------------------------------------------------------------------------- -- ThinkGeek and WIRED's GeekDad team up for the Ultimate GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the lucky parental unit. See the prize list and enter to win: http://p.sf.net/sfu/thinkgeek-promo _______________________________________________ WiX-users mailing list WiX-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wix-users ------------------------------------------------------------------------------ ThinkGeek and WIRED's GeekDad team up for the Ultimate GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the lucky parental unit. See the prize list and enter to win: http://p.sf.net/sfu/thinkgeek-promo _______________________________________________ WiX-users mailing list WiX-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wix-users
