What is the best way to dispose the DbContexts of my active business objects and reset the environment while maintaining all parent-child relationships between those business objects? My scenario is as follows: 1. App is launched and initializes all required business objects including registering child business objects. 2. User makes changes and saves them. 3. App refreshes all data queried to reflect any and all pre and post-save procedures to the user How do I make sure the DbContexts of all my business objects are disposed and reinitialized to ensure the next query is pulled from the database and not EF's cache?

I'm in the process of moving from MM 2010 to MM 2019. It's going as well as can be expected. The changes have been minor... until I turned on security. I got a null reference error from deep in the bowels of MM. It turns out that the error was thrown in mmSecurityManager.GetUserRoleDefaultFormAccess(Guid securityID, DataSet dsRoleSecurity, DataSet dsUserRoles, mmSecurityAccessFormLevel level). The initial cause was when I called GetAccessLevelForm(object userPK, Guid securityID) and default parameters were created by MM and it was sent to the more precise implementation of GetAccessLevelForm(). It turns out, instead of getting the UserRole infomration, it passed a null. public override mmSecurityAccessFormLevel GetAccessLevelForm(object userPK, Guid securityID) { // Original code //return GetAccessLevelForm(userPK, securityID, // oUserSecurity.GetUserSecurityByPK(userPK), // oRoleSecurity.GetRolesSecurityByUser(userPK), // null); // REALLY? just send a null??? // Fill UserRoles with roles for specified user UserRoles oUserRole = new UserRoles(); // This is just a helper I use to make it easy to get data by foreign Key - use your favorite technique oUserRole.GetDataByFK("UserFK", (int)userPK, oRole.TableName); return GetAccessLevelForm(userPK, securityID, oUserSecurity.GetUserSecurityByPK(userPK), oRoleSecurity.GetRolesSecurityByUser(userPK), oUserRole.DataSet); // Now we have real data to send. } Turns out the problem was not quite solved yet... It turns out that there is an error in GetUserRoleDefaultFormAccess. protected override mmSecurityAccessFormLevel GetUserRoleDefaultFormAccess(Guid securityID, DataSet dsRoleSecurity, DataSet dsUserRoles, mmSecurityAccessFormLevel level) { mmSecurityAccessFormLevel result = level; DataRowCollection rows = dsUserRoles.Tables[oRole.TableName].Rows; foreach (DataRow item in rows) { // oRole.PrimaryKey is RolePK - that's not what is in UserRoles //DataRow[] array = dsRoleSecurity.Tables[0].Select( // oRoleSecurity.SecurityFKField + " = '" + securityID.ToString() + "' AND " + // oRoleSecurity.RoleFKField + " = " + item[oRole.PrimaryKey].ToString()); // Change oRolePrimaryKey (RolePK) to oRoleSecurity.RoleFKFiield (RoleFK) DataRow[] array = dsRoleSecurity.Tables[0].Select( oRoleSecurity.SecurityFKField + " = '" + securityID.ToString() + "' AND " + oRoleSecurity.RoleFKField + " = " + item[oRoleSecurity.RoleFKField].ToString()); if (array.Length == 0) { result = mmAppBase.DefaultSecurityAccessFormLevel; break; } } return result; } Hopefully this will help someone turning on security. Jeff

In converting my mm 2010 projects to mm 2019, I have run across my code implementing mmFactoryDesktop. I tried using mmFactory, I get an error: System.InvalidCastException: 'Unable to cast object of type 'Ambit.POS.Main.Factory' to type 'OakLeaf.MM.Main.Windows.Forms.ImmFactoryWinForms'.' I can't find any references in the help file to ImmFactoryWinForms. I have included MM.NET Framework Windows Forms 2019, but I don't can't find the factory I need to override. Thanks, Jeff