Hi,

I am facing memory leak problem when using SF BusinessObject and DevExpress ASPxDataGridView.

I have simple test project, which only has one BO, bind to ASPxDataGridView. It does nothing complicated, just load all records in Page_Load if not IsPostBack.



I found that, the memory usage would become double when I just "refresh" the page. I also used dotTrace profiler and found that # of BO instances keep increasing. I suspect it is the same issue with the post http://forum.strataframe.net/Topic20903-8-1.aspx.



I have prepared sample project and the dotTrace memory profiler files for your reference. MemoryLeak1.dtm is first load memory snapshot and MemoryLeak2.dtm is 2nd snapshot after refresh.



As the file size > 30MB, please download it from http://www.visualsolutions.com.my/blog/chankk/WebApplication6.zip



Hope you could get back to me as soon as possible! It is very urgent!



Thank you

That particular method doesn't play into this. However, we have made a change to the enumerator which could have a potential leak in this scenario.  We created a situation with an enumerator that would force a leak and with the change, it resolved the issue.  So I think that this will resolve your problem altogether.  I will send you a PM with the link for the download.

Hi,

I have tested with the fix you sent, but when refresh the page, it hit error as below, which didn't happen before this fix.



System.NullReferenceException was unhandled by user code

Message="Object reference not set to an instance of an object."

Source="MicroFour StrataFrame Business"

StackTrace:

at MicroFour.StrataFrame.Business.BusinessBindingSource.BusinessObject_CurrentDataTableRefilled()

at MicroFour.StrataFrame.Business.BusinessLayer.raise_CurrentDataTableRefilled()

at MicroFour.StrataFrame.Business.BusinessLayer.OnCurrentDataTableRefilled()

at MicroFour.StrataFrame.Business.BusinessLayer.ChangeCurrentDataTable(DataTable NewTable, Boolean AcceptChanges, Boolean IsSharedTable)

at MicroFour.StrataFrame.Business.BusinessLayer.FillDataTable(String SelectStatement)

at WebApplication8._Default.Page_Load(Object sender, EventArgs e) in C:\Documents and Settings\KKCHAN\My Documents\Visual Studio 2008\Projects\WebApplication8\Default.aspx.cs:line 20

at System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e)

at System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e)

at System.Web.UI.Control.OnLoad(EventArgs e)

at System.Web.UI.Control.LoadRecursive()

at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

InnerException:





Shall you please test using the attachment I posted in previous post and DevExpress 8.2 to ensure the issue could be fixed? It has taken too long time for this, and also because of our timezone, we might not response immediately cause some unnecessary delay.



Thank you

Sorry, this exception was easily reproducable and we already have a fix.  I will send you a PM with a link to download the Business assembly.  This is the only thing that changed.

Hi,

I tested it and it fixed the problem. I will release it to our QC for further testing, will update you if any news. Thank you for your help on this. You safe my life!



Thank you