Programmatically Active Feature

The following snippets may be useful when programmatically activating and deactivating features in SharePoint.

To activate a feature:

// Activate site features
SPWeb currentSite = SPContext.Current.Web;
try
{

currentSite.Features.Add(new Guid("{12345678-1234-1234-1234-123456789123}"));

}
catch { }

// Activate site collection features
SPSite currentSiteCollection = SPContext.Current.Site;
try
{

currentSiteCollection.Features.Add(new Guid("{12345678-1234-1234-1234-123456789123}"));

}
catch { }

To deactivate a feature:

// De-activate site features
SPWeb currentSite = SPContext.Current.Web;
try
{

currentSite.Features.Remove(new Guid("{12345678-1234-1234-1234-123456789123}"));

}
catch { }

// De-activate site collection features
SPSite currentSiteCollection = SPContext.Current.Site;
try
{

currentSiteCollection.Features.Remove(new Guid("{12345678-1234-1234-1234-123456789123}"));

}
catch { }

The following example installs a feature definition in the server farm

System.Globalization.CultureInfo cInfo = new System.Globalization.CultureInfo(1033);

SPFeatureDefinitionCollection farmFeatures = SPFarm.Local.FeatureDefinitions;

Guid farmGuid = new Guid("BCFC1029-7DB4-4e9c-B162-B03CE8497DAC");

SPFeatureDefinition featureDefinition = farmFeatures.Add(@"Feature_Folder\Feature.xml", farmGuid, true);

Response.Write("Farm definition " + SPEncode.HtmlEncode(featureDefinition.GetTitle(cInfo)) + " added.
");

Shailen Sukul