关于清单文件 [英] About Manifest file

问题描述

最近，我遇到了一个非常奇怪的问题，该问题仅在Windows XP SP3和Vista中发生.这是我的步骤:

Recently, I encountered a very strange issue, this issue only happens in Windows XP SP3 and Vista. Here are my steps:

1. 在桌面上创建两个新文件夹(假设文件夹名称为A和B)
2. 将Microsoft GraphEdit(graphedt.exe)应用程序复制到A文件夹，然后也创建一个空的graphedt.exe.manifest文件.运行graphedt.exe，您会看到一条错误消息，由于清单错误，graphedt.exe无法运行.
3. 将Microsoft GraphEdit(graphedt.exe)应用程序复制到B文件夹，运行graphedt.exe并关闭它，然后创建一个空的graphedt.exe.manifest文件，再次运行graphedt.exe，您将看到清单文件不适用于graphedt.exe.但是，如果您更改graphed.exe的最后修改时间，则清单将再次起作用.

1. Create two new folders in desktop (assume folder names are A and B)
2. Copy Microsoft GraphEdit (graphedt.exe) application to A folder, then create a empty graphedt.exe.manifest file as well. Run graphedt.exe, you will see a error message, the graphedt.exe can’t run due to the wrong manifest.
3. Copy Microsoft GraphEdit (graphedt.exe) application to B folder, run graphedt.exe and close it, then create a empty graphedt.exe.manifest file, run graphedt.exe again, you will see the manifest file can’t apply to graphedt.exe. But if you change the last modified time of graphed.exe, the manifest will work again.

Windows似乎在EXE第一次使用清单文件时会记住该状态，但是如果您更改EXE大小或上次修改日期，Windows也会重置以前记住的状态.

It seems Windows will remember the status the first time the EXE uses a manifest file, but also Windows will reset the old remembered status if you change the EXE size or last modified date.

推荐答案

[我是Microsoft当前的SxS维护者]

[I'm the current SxS maintainer at Microsoft]

良好的调查仪岗.您是在Vista而不是XP SP3上描述这种行为.

Good investigation Yigang. You're describing the behavior on Vista, not on XP SP3.

每次运行应用程序时探查清单是否存在将是性能问题，因为通常应用程序具有清单或没有清单，并且该状态不会有太大变化.因此，在Vista上，第一次运行应用程序时，我们缓存了一段描述此应用程序具有关联的清单"或此应用程序没有清单"的信息.第一次运行graphedtt.exe时，Windows缓存了缺少清单的文件，随后将不再查找清单.要重置缓存，请更新可执行文件的上次修改时间.

Probing for the existence of a manifest every time an app is run would be a performance issue, since usually apps either have a manifest or don't, and that state doesn't change much. For this reason, on Vista, the first time an application is run, we cache a bit describing "this application has an associated manifest" or "this application does not have a manifest". When you ran graphedt.exe the first time, Windows cached the absence of a manifest, and will subsequently not look for one. To reset the cache, update the last modified time on the executable.

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