递归删除树结构数据

DeleteBasicProtocolRecursively

private void DeleteBasicProtocolRecursively(ModelContainer container, string parentId, string strProtocolId)

        {

 

            #region BasicProtocolStructure

 

            var nodes = from node in container.BasicProtocolStructures

                        where node.Pid == parentId

                        select node;

            if (nodes != null && nodes.Count<BasicProtocolStructure>() > 0)

            {

                foreach (BasicProtocolStructure ps in nodes)

                {

 

                    container.BasicProtocolStructures.DeleteObject(ps);

                    DeleteBasicProtocolRecursively(container, ps.Id, strProtocolId);

                }

            }

            #endregion

 

            #region BasicProtocolItem

            var sItems = from item in container.BasicProtocolItems

                         where item.Pid == parentId

                         && item.ProtocolId == strProtocolId

                         select item;

            if (sItems != null && sItems.Count<BasicProtocolItem>() > 0)

            {

                foreach (BasicProtocolItem bpi in sItems)

                {

                    container.BasicProtocolItems.DeleteObject(bpi);

                }

            }

            #endregion

        }

 

DeleteBasicProtocolRecursivelyByProtocolId

        //Attention: This method should never set as Operation Contract

        public int DeleteBasicProtocolRecursivelyByProtocolId()

        {

            ModelContainer container = ModelContext.Container;

            if (container == null)

            {

                return -1;

            }

 

            var BasicProtocolWantToDelete = from c in container.BasicProtocolStructures

                                            where c.Id != "53ebc489-29e8-4e17-9cd1-8f7b485c3334"

                                            && c.Id != "62d93b36-5c2e-426c-912a-5fa103bca694"

                                            && c.Id != "c632d27b-48c1-4566-aef7-2e7d5529a0d2"

                                            && c.Pid == null

                                            select c;

            if (BasicProtocolWantToDelete != null && BasicProtocolWantToDelete.Count<BasicProtocolStructure>() > 0)

            {

                foreach (BasicProtocolStructure bps in BasicProtocolWantToDelete)

                {

                    this.DeleteBasicProtocolRecursively(container, bps.Id, bps.Id);

                    container.BasicProtocolStructures.DeleteObject(bps);

                }

            }

            return ModelContext.SaveChanges();

        }