如何使用基于IExecuteCommand的Shell扩展来使某些上下文菜单选项变灰？ [英] How to gray out some context-menu options with an IExecuteCommand-based shell extension?

问题描述

使用 IExecuteCommand 方法实现上下文菜单外壳扩展时（如此博客文章），如何将给定的菜单选项显示为灰色？

When implementing a context-menu shell extension using the IExecuteCommand approach (as described in this blog post), how can a given menu option be grayed out?

例如假设shell扩展提供了一些菜单选项，并且应根据shell扩展计算的某些状态和条件将其中的某些菜单选项显示为灰色，例如：如果用户右键单击文件，并且shell扩展检测到该文件，具有某些给定的属性，一些shell扩展上下文菜单选项应显示为灰色。

E.g. Suppose that the shell extension offers some menu options, and some of them should be grayed out basing on some state and conditions that the shell extension computes, for example: if the user right-clicks on a file and the shell extension detects that this file has some given properties, some of the shell extension context menu options should be grayed out.

如何使用 IExecuteCommand ？

还是应该使用另一个Windows Shell COM接口？

Or should another Windows Shell COM interface be used for that purpose?

推荐答案

我从没有尝试过，但是您应该能够在动词的键中将 CommandStateHandler （未记录？）设置为实现 IExplorerCommandState 。

I have never tried this but you should be able to set CommandState­Handler (undocumented?) in your verb's key to a CLSID that implements IExplorerCommandState.

您可能还会考虑实施使用IExplorerCommand 而不是IExecuteCommand + IExplorerCommandState ...

You might also think about implementing IExplorerCommand instead of IExecuteCommand+IExplorerCommandState...

您还可以根据对属性系统的查询，使用<$ c $隐藏动词c> ApplyTo 值。

You can also hide verbs based on a query to the property system with the AppliesTo value.

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