get comments and attached files from change order

[Chiften]

hi .I am developing an application using C# for Autodesk Vault .I've gotten Change orders and I want to know how can I get comments and attached files in each comment of a specific change order with vault API. 

thanks.

[Chiften]

Can anybody help me?? 

@Markus.Koechl  please help

[Markus.Koechl · Accepted solution]

Once you get your change order, you can access all related objects using the ChangeOrderGrp object: 

            //get all related entities of an ECO
            Autodesk.Connectivity.WebServices.ChangeOrderService mCoSrvc = mVault.ChangeOrderService;
            Autodesk.Connectivity.WebServices.ChangeOrder mCo = mCoSrvc.GetChangeOrderByNumber("ECO-000010");
            Autodesk.Connectivity.WebServices.ChangeOrderGrp mCoGrp = mCoSrvc.GetChangeOrderGroupByChangeOrderId(mCo.Id);

            //access related files or items (= Records Tab)
            if (mCoGrp.FileIdArray != null)
            {
                Autodesk.Connectivity.WebServices.File[] mFiles = mVault.DocumentService.GetFilesByIds(mCoGrp.FileIdArray);
            }
            if (mCoGrp.ItemIdArray != null)
            {
                Autodesk.Connectivity.WebServices.Item[] mItems = mVault.ItemService.GetItemsByIds(mCoGrp.ItemIdArray);
            }

            //access attached files (= Files Tab)
            if (mCoGrp.AttmtIdArray != null)
            {
                Autodesk.Connectivity.WebServices.File[] mAttdFiles = mVault.DocumentService.GetFilesByIds(mCoGrp.AttmtIdArray);
            }

            //access the ECO's communication thread (= Comments Tab)
            Autodesk.Connectivity.WebServices.ForumService mFrmSrvc = mVault.ForumService;
            Autodesk.Connectivity.WebServices.Msg[] mCoMsgs = mFrmSrvc.GetMessagesByForumId(mCoGrp.ForumId);
            //access the ECO's communication thread (= Comments Tab) including files, attached to comments
            Autodesk.Connectivity.WebServices.MsgGroup[] mCoMsgGrps = mFrmSrvc.GetMessageGroupsByForumId(mCoGrp.ForumId);
            if (mCoMsgGrps !=null)
            {
                foreach (var mMsgGrp in mCoMsgGrps)
                {
                    if (mMsgGrp.FileIdArray != null)
                    {
                        Autodesk.Connectivity.WebServices.File[] mCommentAttmts = mVault.DocumentService.GetFilesByIds(mMsgGrp.FileIdArray);
                    }
                }
                
            }