How to Detect .NET Framework - Revision history

ConversionBot: Adding new author and category links.

2005-06-24T12:26:01Z

Adding new author and category links.

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	~~\|<small>Author: [[~~{~~{ns:2}}:sunjammer~~\|sunjammer~~]] ([[{{ns:3}}:sunjammer\|talk]], [[{{ns:-1}~~}~~:Contributions/sunjammer\|contrib]])</small>~~
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	== How To Use ==		== How To Use ==
	This function will return 1 (through the stack) if .NET Framework is found on the computer it is running on, or 0 if .NET Framework is not found. It first gets the install root of .NET Framework from:		This function will return 1 (through the stack) if .NET Framework is found on the computer it is running on, or 0 if .NET Framework is not found. It first gets the install root of .NET Framework from:
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	FunctionEnd</highlight-nsis>		FunctionEnd</highlight-nsis>

	[[~~{{ns:14}}~~:Other Products Version Detection Functions]]		[[Category:Other Products Version Detection Functions]]

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2005-04-30T20:44:58Z

Added category links.

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	Exch $0		Exch $0
	FunctionEnd</highlight-nsis>		FunctionEnd</highlight-nsis>

			[[{{ns:14}}:Other Products Version Detection Functions]]

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2005-04-30T02:59:05Z

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 == How To Use ==
 This function will return 1 (through the stack) if .NET Framework is found on the computer it is running on, or 0 if .NET Framework is not found. It first gets the install root of .NET Framework from:
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      Exch $0
 FunctionEnd</highlight-nsis>

ConversionBot: Updated author and download links, and changed format of some pages.

2005-04-23T12:16:34Z

Updated author and download links, and changed format of some pages.

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	Page author: sunjammer		Page author: [[User:sunjammer\|sunjammer]]

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2005-04-09T19:04:01Z

Wikipedia python library

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== How To Use ==
This function will return 1 (through the stack) if .NET Framework is found on the computer it is running on, or 0 if .NET Framework is not found. It first gets the install root of .NET Framework from:

''"HKLM\Software\Microsoft\.NETFramework\InstallRoot"''

then it enumerates the sub-keys of:

''"HKLM\Software\Microsoft\.NETFramework\Policy"''

and checks for each sub-key if the version it is specifying exists in the .NET Framework install root. If one of them exists it returns 1.

I would like to thank TechKid for helping out with the creation of this function.

Below is the function itself. Scroll down a bit to find a full example.

== The Function ==
<highlight-nsis>; IsDotNETInstalled
;
; Usage:
; Call IsDotNETInstalled
; Pop $0
; StrCmp $0 1 found.NETFramework no.NETFramework
Function IsDotNETInstalled
Push $0
Push $1
Push $2
Push $3
Push $4

ReadRegStr $4 HKEY_LOCAL_MACHINE \
"Software\Microsoft\.NETFramework" "InstallRoot"
# remove trailing back slash
Push $4
Exch $EXEDIR
Exch $EXEDIR
Pop $4
# if the root directory doesn't exist .NET is not installed
IfFileExists $4 0 noDotNET

StrCpy $0 0

EnumStart:

EnumRegKey $2 HKEY_LOCAL_MACHINE \
"Software\Microsoft\.NETFramework\Policy" $0
IntOp $0 $0 + 1
StrCmp $2 "" noDotNET

StrCpy $1 0

EnumPolicy:

EnumRegValue $3 HKEY_LOCAL_MACHINE \
"Software\Microsoft\.NETFramework\Policy\$2" $1
IntOp $1 $1 + 1
StrCmp $3 "" EnumStart
IfFileExists "$4\$2.$3" foundDotNET EnumPolicy

noDotNET:
StrCpy $0 0
Goto done

foundDotNET:
StrCpy $0 1

done:
Pop $4
Pop $3
Pop $2
Pop $1
Exch $0
FunctionEnd</highlight-nsis>

== Full Example ==
<highlight-nsis>
Name ".NET Framework Check"
OutFile "Check .NET.exe"
Caption ".NET Framework Check"
ShowInstDetails show

Section
Call IsDotNETInstalled
Pop $R3
StrCmp $R3 0 +3
DetailPrint "Found .NET!"
Goto +2
; else
DetailPrint "Can't find .NET!"
SectionEnd

Function IsDotNETInstalled
Push $0
Push $1
Push $2
Push $3
Push $4

ReadRegStr $4 HKEY_LOCAL_MACHINE \
"Software\Microsoft\.NETFramework" "InstallRoot"
# remove trailing back slash
Push $4
Exch $EXEDIR
Exch $EXEDIR
Pop $4
# if the root directory doesn't exist .NET is not installed
IfFileExists $4 0 noDotNET

StrCpy $0 0

EnumStart:

EnumRegKey $2 HKEY_LOCAL_MACHINE \
"Software\Microsoft\.NETFramework\Policy" $0
IntOp $0 $0 + 1
StrCmp $2 "" noDotNET

StrCpy $1 0

EnumPolicy:

EnumRegValue $3 HKEY_LOCAL_MACHINE \
"Software\Microsoft\.NETFramework\Policy\$2" $1
IntOp $1 $1 + 1
StrCmp $3 "" EnumStart
IfFileExists "$4\$2.$3" foundDotNET EnumPolicy

noDotNET:
StrCpy $0 0
Goto done

foundDotNET:
StrCpy $0 1

done:
Pop $4
Pop $3
Pop $2
Pop $1
Exch $0
FunctionEnd</highlight-nsis>

Page author: sunjammer