如何檢查功能是否已被激活？

Question

我知道我可以檢查 安裝 激活通過SPSite.Features（讀什麼凱爾下面說的）網站的功能。

我也知道我可以通過spSite.Features.Add("featureId")或.Remove添加或刪除功能。

現在的問題是：如何檢查功能是否爲有效？當查詢SPSite.Features時，我得到了該網站的所有功能，它返回SPFeature對象。但我仍然不知道該功能是否處於活動狀態。

基本上我想有一個spSite.Features["featureId"].isActive布爾或類似的布爾。

Answer 1

SPSite.Features不包含安裝功能。它包含激活的功能。

要獲取已安裝的所有功能的列表，無論是否激活，您都需要從SPSite.FeatureDefinitions屬性中獲取SPFeatureDefinition對象。

// Get a list of activated features 
SPFeatureCollection features = SPContext.Current.Site.Features; 

// Get a list of all feature definitions available 
SPFeatureDefinitionCollection featureDefinitions = SPContext.Current.Site.FeatureDefinitions; 

一個更好的描述從msdn：

The presence of a feature in a collection at the farm 
(Microsoft.SharePoint.Administration.SPWebService), Web application 
(Microsoft.SharePoint.Administration.SPWebApplication), site collection 
([T:Microsoft.SharePoint.SPSite)], or Web site (Microsoft.SharePoint.SPWeb) 
levels indicates that the feature is activated. Lack of an SPFeature object 
indicates that the object is not active in the given scope. 

http://msdn.microsoft.com/en-us/library/microsoft.sharepoint.spsite.featuredefinitions.aspx

http://msdn.microsoft.com/en-us/library/microsoft.sharepoint.spsite.features.aspx