CODEWITHSUNDEEP
c#winformswindows-installer
littlechris
littlechris

Reputation: 4184

How do I use MsiGetProductInfo to get installed version number c# winforms 4.0?

I'm trying to get the installed version number of my win fomrs application using the MsiGetProductInfo function. I am try to alter code i found on this post, but all I get is wing ding looking text when I alter my call to the function like so

MsiGetProductInfo("{9806C9BE-59D4-4DEE-802F-0E492023DE8A}", "INSTALLPROPERTY_VERSIONSTRING", builder, ref len);

Its a 4.0 c# Winforms project that is installed with a standard vs2010 setup project. The client machines are win 7 and win XP

Upvotes: 0

Views: 2533

Answers (2)

Stephen Lee Parker
Stephen Lee Parker

Reputation: 1265

I know this is very old, but I recently had a similar issue, the fix is to change "INSTALLPROPERTY_VERSIONSTRING" to "VersionString"

Upvotes: 2

William Mioch
William Mioch

Reputation: 917

Have you checked the return value of the function? If it returns an error, it's possible that the buffer is filled with garbage.

This is a list of the possible returns, from the MSDN page here

Return Value

ERROR_BAD_CONFIGURATION The configuration data is corrupt.

ERROR_INVALID_PARAMETER An invalid parameter was passed to the function.

ERROR_MORE_DATA A buffer is too small to hold the requested data.

ERROR_SUCCESS The function completed successfully.

ERROR_UNKNOWN_PRODUCT The product is unadvertised or uninstalled.

ERROR_UNKNOWN_PROPERTY The property is unrecognized.

Note The MsiGetProductInfo function returns ERROR_UNKNOWN_PROPERTY if the application being queried is advertised and not installed.

Upvotes: 0

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