Check .NET Version with Inno Setup
原文 http://www.kynosarges.org/DotNetVersion.html
Inno Setup by Jordan Russell is a great installation scripting program, but lacks a built-in function to determine the .NET Framework version installed on the target machine. Fortunately, it’s easy to write such a function using Inno Setup’s Pascal scripting language.
Microsoft maintains a set of registry keys that indicate the installed .NET Framework versions and service packs. C# MVP Scott Dorman has posted a list comprising versions 1.0 through 4.0 (at the time of this writing) in this Stack Overflow thread. The required registry keys are quite similar for most .NET Framework versions except 1.0. We’ll ignore that version which has been obsoleted by 1.1 anyway.
Version 4.5 is somewhat tricky since it installs as an in-place update for version 4.0 and reuses the exact same registry keys. The MSDN page How to: Determine Which .NET Framework Versions Are Installed suggests checking for the presence of DWORD
value Release
, so that’s what I’m doing below. An alternative would be to examine the REG_SZ
value Version
which equals 4.0.30319 for .NET 4.0 and 4.5.50709 for .NET 4.5.
The Script
In the following Inno Setup scripting code block, function IsDotNetDetected
checks whether the specified .NET Framework version and at least the specified service pack level are installed. All listed version strings are for final release versions; betas and release candidates typically have different version numbers. Function InitializeSetup
demonstrates how to use IsDotNetDetected
to check for .NET Framework 4.0 Client Profile without service packs.
I’m placing this small bit of code in the public domain, so you may embed it in your own projects as you see fit.
[Code]
function IsDotNetDetected(version: string; service: cardinal): boolean;
// Indicates whether the specified version and service pack of the .NET Framework is installed.
//
// version -- Specify one of these strings for the required .NET Framework version:
// 'v1.1.4322' .NET Framework 1.1
// 'v2.0.50727' .NET Framework 2.0
// 'v3.0' .NET Framework 3.0
// 'v3.5' .NET Framework 3.5
// 'v4\Client' .NET Framework 4.0 Client Profile
// 'v4\Full' .NET Framework 4.0 Full Installation
// 'v4.5' .NET Framework 4.5
//
// service -- Specify any non-negative integer for the required service pack level:
// 0 No service packs required
// 1, 2, etc. Service pack 1, 2, etc. required
var
key: string;
install, release, serviceCount: cardinal;
check45, success: boolean;
begin
// .NET 4.5 installs as update to .NET 4.0 Full
if version = 'v4.5' then begin
version := 'v4\Full';
check45 := true;
end else
check45 := false; // installation key group for all .NET versions
key := 'SOFTWARE\Microsoft\NET Framework Setup\NDP\' + version; // .NET 3.0 uses value InstallSuccess in subkey Setup
if Pos('v3.0', version) = 1 then begin
success := RegQueryDWordValue(HKLM, key + '\Setup', 'InstallSuccess', install);
end else begin
success := RegQueryDWordValue(HKLM, key, 'Install', install);
end; // .NET 4.0/4.5 uses value Servicing instead of SP
if Pos('v4', version) = 1 then begin
success := success and RegQueryDWordValue(HKLM, key, 'Servicing', serviceCount);
end else begin
success := success and RegQueryDWordValue(HKLM, key, 'SP', serviceCount);
end; // .NET 4.5 uses additional value Release
if check45 then begin
success := success and RegQueryDWordValue(HKLM, key, 'Release', release);
success := success and (release >= 378389);
end; result := success and (install = 1) and (serviceCount >= service);
end; function InitializeSetup(): Boolean;
begin
if not IsDotNetDetected('v4\Client', 0) then begin
MsgBox('MyApp requires Microsoft .NET Framework 4.0 Client Profile.'#13#13
'Please use Windows Update to install this version,'#13
'and then re-run the MyApp setup program.', mbInformation, MB_OK);
result := false;
end else
result := true;
end;
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