Need to Dispose:
1. SPSite oSPsite = new SPSite( )
2. siteCollection = new SPSite(SPContext.Current.Web.Url))
3. SPSite siteCollection = siteCollections.Add( "sites/myNewSiteCollection", "DOMAIN\\User", )
4. using (SPWeb web = new SPSite(SPContext.Current.Web.Url).OpenWeb()) { // SPSite leaked ! }
5. UserProfileManager profileManager = new UserProfileManager(ServerContext.GetContext(siteCollection)); UserProfile profile = profileManager.GetUserProfile( "domain\\username"); SPSite personalSite = profile.PersonalSite; // Will leak.
6. SPWeb oSPWeb = oSPSite.OpenWeb()
7. SPWeb web = siteCollection.AllWebs.Add( "site-relative URL");
8. using (SPWeb web = siteCollection.OpenWeb()) { SPWeb addedWeb = web.Webs.Add(strWebUrl); // Will leak. }
9. for(i = 0;i < oSPWeb.Webs.Count;i++) { oSPWeb2 = oSPWeb.Webs[i]; BuildTableRow(oDisplayTable, "Web", oSPWeb2.Title); oSPWeb2.Dispose(); }
10. Area area = AreaManager.GetArea(PortalContext.Current, new Guid( "{GUID}")); using (SPWeb areaWeb = area.Web) { string str = areaWeb.Title; }
11. using (SPSite siteCollection = new SPSite( "http://moss")) { using (SPWeb web = siteCollection.OpenWeb()) { SPFile page = web.GetFile( "Source_Folder_Name/Source_Page"); SPLimitedWebPartManager webPartManager = page.GetLimitedWebPartManager(PersonalizationScope.Shared); webPartManaber.Web.Dispose(); } // SPWeb object web.Dispose() automatically called. } // SPSite object siteCollection.Dispose() automatically called.
12. using (SPWeb web = siteCollection.OpenWeb()) { PublishingWeb variationPublishingWeb = null; try { PublishingWeb publishingWeb = PublishingWeb.GetPublishingWeb(web); // Passing in SPWeb object, so no Close() needed. VariationLabel variationLabel = Variations.Current.UserAccessibleLabels[0]; variationPublishingWeb = publishingWeb.GetVariation(variationLabel); // Must be Closed(). // ... } finally { if(variationPublishingWeb != null) variationPublishingWeb.Close(); } } //
Don't Need to Dispose:
1. SPWeb web = SPControl.GetContextWeb(HttpContext.Current)
2. SPWebCollection webCollection = siteCollection.AllWebs;
3. using (SPSite siteCollection = new SPSite( "http://moss")) { using (SPWeb outerWeb = siteCollection.OpenWeb()) { foreach (SPWeb innerWeb in siteCollection.AllWebs) { try { // ... } finally { if(innerWeb != null) innerWeb.Dispose(); } } } // SPWeb object outerWeb.Dispose() automatically called. }
4. IPersonalPage currentMySitePage = this.Page as IPersonalPage; if (currentMySitePage != null && !currentMySitePage.IsProfileError) { SPSite personalSite = currentMySitePage.PersonalSite; // Will not leak. // ... }
5. SPWeb parentWeb = list.ParentWeb; //No explicit dispose required. 6. SPSite siteCollection = SPControl.GetContextSite(Context); 7. SPWeb web = SPControl.GetContextWeb(Context);
8. PublishingWeb outerPubWeb = PublishingWeb.GetPublishingWeb(web); PublishingWebCollection pubWebCollection = outerPubWeb.GetPublishingWebs();
For and Foreach
foreach (siteCollectionInner in siteCollections) { try //Should be first statement after foreach. { Console.WriteLine(siteCollectionInner.Url); //Exception occurs here. } finally { if(siteCollectionInner != null) siteCollectionInner.Dispose(); }
Class Design Pattern
public MyClass { private SPSite _site; private SPWeb _web; MyClass() { _site = new SPSite(url); _web = _site.OpenWeb(); }
public void MethodA() { _siteCollection = new SPSite( "http://moss"); _web = _siteCollection.OpenWeb(); } public void MethodB() { if (_web != null) { string title = _web.Title; } } public void MethodC() { if (_web != null) { string name = _web.Name; } } //do stuff w/member variables //dispose of object to prevent memory leaks ~MyClass() { if ( _site == null ) { _site.Dispose(); _site = null;
} if ( _web == null ) { _web.Dispose(); _web = null; } } }