Inno Setup:Exec无法读取字符串? [英] Inno Setup: Exec can't read string?

问题描述

我正在尝试组装一个简单的Inno Setup安装程序，该安装程序查找先前的版本并在继续之前将其删除.一切正常，直到我得到以下代码:

I'm trying to put together a simple Inno Setup installer which looks for the previous version and removes it before proceeding. Everything is working fine until I get the following code:

  if Exec(UninstallString, '/SILENT', '', SW_SHOW, ewWaitUntilTerminated, ResultCode) then
  begin
    MsgBox('Previous version found and uninstalled successfully.', mbInformation, MB_OK);
  end
  else
  begin
    MsgBox('Please uninstall the previous version of this mod before continuing.', mbInformation, MB_OK);
    Result := FALSE;
  end;

这是一段非常简单的代码，但是总是失败.我检查了UninstallString的内容，它们是正确的(C:\Windows\unins000.exe)，但是 Exec 失败，并显示以下错误:目录名称无效."

It's a very simple bit of code, but it ALWAYS fails. I've checked the contents of UninstallString and they're correct (C:\Windows\unins000.exe) but the Exec fails with the error: "The directory name is invalid."

看来它无法正确读取"UninstallString"的内容，因为如果我手动输入它们(例如Exec('C:\Windows\unins000.exe, ...)，它将可以正常工作.

It appears that it can't read the contents of "UninstallString" correctly, because if I enter them manually (e.g. Exec('C:\Windows\unins000.exe, ...) it works fine.

如何让Exec按预期处理字符串"UninstallString"?

How can I make Exec process the string "UninstallString" as intended?

推荐答案

我不知道您是否已经做过MsgBox来确定注册表中UninstallString的 exact 字符串.但在注册表中，正常字符串为"C:\Windows\unins000.exe".

I don't know if you already did the MsgBox to determine the exact string in the registry for the UninstallString but in the registry the normal string is "C:\Windows\unins000.exe".

请注意该命令周围的额外 ".

Note the extra " around the command.

在命令周围将Exec与"一起使用时，您将得到一个ResultCode 267，这是一个invalid directory错误.因此，您需要在Exec之前将它们剥离.

When using Exec with the " around the command you get a ResultCode 267 which is an invalid directory error. So you need to strip them before the Exec.

在Exec中手动输入C:\Windows\unins000.exe时，您方便地忘记了它们;)

When you entered the C:\Windows\unins000.exe manually in Exec you conveniently forgot them ;)

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