C＃VS卸载程序

Question

I have created VS installer in VS2010. it works fine. when the program is already installed and you re-run the installer it would prompt for repair and uninstall. this is good. the problem is when I re-build the same exact installer and try to install it on a machine that already has one installed it would not give me the prompt repair and uninstall. Instead it gives me pop up error "Windows Installer: Another version of this product is already installed. Installation of this version cannot continue...." then it asks me to do manual uninstall using Add/Remove program from Control panel.

So there is gotta be something changed/auto generated during the re-build. kind a like key or something that is different from the older version which makes the newer one fails to recognize the older version. anybody knows how to handle this?

Answer 1

increment your setup project version and set

- DetectNewerInstalledVersion = true
- RemovePrevousVersions = true

more info : http://social.msdn.microsoft.com/Forums/en/winformssetup/thread/717cfce0-3061-400f-9ea3-069f73f3a473

Answer 2

If you increase the version it will automatically detect the previous version and handle it as per your configuration on RemovePrevousVersions and DetectNewerInstalledVersion .

Answer 3

On the properties on the VS Setup project set the RemovePreviousVersions to True. I believe by default it is set to false. I beleive that would save some time instead of doing it manually.

Also, there is an ProductCode, UpgradeCode, and Version in these properties. These control installation behavior, more information is here:

http://msdn.microsoft.com/en-us/library/aa372845(v=VS.85).aspx

Here are more details:

http://msdn.microsoft.com/en-us/library/aa370579(v=vs.85).aspx