如何调试挂起SaveFileDialog [英] How to debug hanging SaveFileDialog

问题描述

当显示另存为对话框时，我的VSTO加载项报表的几个用户挂起。这种情况发生在Excel加载项以及Word加载项中。有趣的是，当在文档上调用另存为命令时，两个应用程序也会挂起。

Several users of my VSTO add-ins report hangs that occur when a "Save as" dialog should be displayed. This happens with an Excel add-in as well as a Word add-in. Interestingly, both applications also tend to hang when invoking the "Save as" command on a document.

我很难解决这个问题，因为整个应用程序刚刚冻结之后

I am having a hard time to troubleshoot this because the entire application just freezes after

// using System.Windows.Forms;
SaveFileDialog dlg = new SaveFileDialog();
// lines to configure dlg left out
dlg.ShowDialog();

在这种情况下尝试关闭Excel或Word时，会出现一个消息框Excel / Word不能关闭出现，人们不得不诉诸于任务管理器来摆脱它。

When attempting to close Excel or Word in this situation, a message box "Excel/Word can not be closed" appears, and people have to resort to the Task Manager to get rid of it.

Excel和Word经常挂起另存为的事实特别令人不安，因为我看不到我的加载项如何干扰这些应用程序的内置另存为命令。

The fact that both Excel and Word frequently hang on "Save as" is particularly disturbing, because I don't see how my add-ins interfere with the built-in "Save as" commands of these applications.

更糟糕的是，添加 - 甚至不需要加载。通过取消选中COM加载项中的相应条目并重新启动应用程序来停用它们不能解决问题。我必须完全删除加载项，以确保另存为不冻结应用程序。

To make matters worse, the add-ins need not even be loaded. Deactivating them by unchecking the corresponding entry in "COM add-ins" and restarting the application does not solve the problem. I have to completely remove the add-ins to make sure "Save as" does not freeze the application.

这让我觉得它不是我的add-这是问题，但只是存在（非活动）VSTO加载项，从而阻止文件对话框出现，从而导致挂起。

This makes me think that it is not code in my add-ins that is the problem, but the mere presence of an (inactive) VSTO add-in that prevents a file dialog from appearing, thereby causing a hang.

挂起不总是发生，而不是在所有机器上。这是非常随机的。

The hangs do not always occur, and not on all machines. It's quite random.

我将如何进一步调查？我有Visual Studio Professional 2013，但不知道如何找出Office应用程序冻结的原因和位置。

How would I go about investigating this further? I have Visual Studio Professional 2013, but do not know how to find out why and where the Office application freeze.

推荐答案

Excel冻结打开/保存就好像一个托管加载项注册了一个预热注册表值，即使加载项没有加载。

Excel freezes on Open/Save As if a managed add-in is registered with a "Warmup" registry value, even if the add-in is not even loaded.

预热 注册表值在加载项的注册表项中设置为1时，曾经被认为导致Excel在启动时加载VSTO运行时，而不是当第一个用户与加载项的交互发生时。显然，它从未实现，并已从Microsoft的在线 VSTO加载项的注册表项文档。

The "Warmup" registry value, when set to 1 in an add-in's registry key, was once supposed to cause Excel to load the VSTO runtime at startup, rather than when the first user interaction with the add-in occurred. Apparently, it was never implemented and has since been removed from Microsoft's online documentation of the registry entries for VSTO add-ins.

一旦我从加载项的注册表项中删除了预热值，Excel的打开/另存为对话框就不再冻结了，加载项自己也不会保存 SaveFileDialog.ShowDialog（）电话。我不知道为什么会这样，但显然地，热身的价值确实会做某些。

Once I removed the "Warmup" value from my add-in's registry key, Excel's Open/Save As dialogs no longer froze, nor did the add-in's own SaveFileDialog.ShowDialog() calls. I don't know why this is, but evidently, the "Warmup" value does do something.

我能够再现这个一个没有做任何事情的虚拟加载项。如果这个虚拟加载项在 HKCU\Software\Microsoft\Excel\Addins 中注册，而没有预热 DWORD ，Excel工作正常。当我添加 DWORD ，值为 1 时，当我点击打开或另存为时，Excel会冻结 - 再一次，虚拟加载项根本就没有做任何事情。

I was able to reproduce this with a dummy add-in that does not do anything. If that dummy add-in is registered in HKCU\Software\Microsoft\Excel\Addins without the "Warmup" DWORD, Excel works just fine. As soon as I add the DWORD with a value of 1, Excel freezes when I click Open or Save As -- again, the dummy add-in does not do anything at all.

所以，如果人们在这里想知道为什么他们的Office应用程序在安装VSTO加载项后冻结，我建议从注册表中删除预热值，而不是花费几个小时调试代码（就像我之前发现的热身）。

So, if people get here wondering why their Office application freezes after installation of a VSTO add-in, I'd suggest to remove the "Warmup" value from the registry rather than spending hours debugging their code (as I did before I found out about "Warmup").

来自用户的反馈是正面的。

Feedback from my users is positive.

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