Collection was modified; enumeration operation may not execute.


Collection was modified; enumeration operation may not execute.
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ChanKK
ChanKK
ChanKK
posted 13 Years Ago
StrataFrame User (248 reputation)StrataFrame User (248 reputation)StrataFrame User (248 reputation)StrataFrame User (248 reputation)StrataFrame User (248 reputation)StrataFrame User (248 reputation)StrataFrame User (248 reputation)StrataFrame User (248 reputation)StrataFrame User (248 reputation)
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ChanKK
ChanKK
ChanKK
posted 13 Years Ago
StrataFrame User (248 reputation)StrataFrame User (248 reputation)StrataFrame User (248 reputation)StrataFrame User (248 reputation)StrataFrame User (248 reputation)StrataFrame User (248 reputation)StrataFrame User (248 reputation)StrataFrame User (248 reputation)StrataFrame User (248 reputation)
Group: Forum Members
Posts: 190, Visits: 1.3K
My code in case

DataEntryBasePage.cs

protected override void OnPreLoad(EventArgs e)
        {
            //-- Vault Comments:
            //-- SF use property name (BusinessLater derived type) as key
            //-- when store BO instance to session. It meant difference page
            //-- might use the same BO instance if they are defined with 
            //-- same property name in page. It has possiblity that BO data/state 
            //-- defined in page not compatible with others. Since we unable to 
            //-- override this behavour (private methods), workaround is to
            //-- dispose BO instance at session before SF initialize BO.

            //-------------------------------------------------
            //-- Dispose BO instance in session which used in 
            //-- this page to avoid "conflict" with other page
            //-------------------------------------------------

            if (!this.Page.IsPostBack && !this.Page.IsCallback)
            {
                //this.RemoveUnusedBusinessObjectsFromSession();
                this.RemoveBusinessObjectsInstanceFromSession();
            }

            base.OnPreLoad(e);
        }

private void RemoveBusinessObjectsInstanceFromSession()
        {
            string businessObjectName = string.Empty;
            BusinessLayer businessObject;

            PropertyInfo[] propertyInfos = GetBusinessObjectInfosEx();
            foreach (PropertyInfo propInfo in propertyInfos)
            {
                businessObjectName = propInfo.Name;

                businessObject = SessionManager.Instance.Get<BusinessLayer>(businessObjectName);

                if (businessObject != null)
                {
                    businessObject.Dispose();
                    businessObject = null;

                    SessionManager.Instance.Set(businessObjectName, null);
                }
            }
        }
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