XML的读写

            XDocument doc = XDocument.Load(GetXMLFile());
            doc.Root.RemoveAll();
            //添加地灾类型
            XElement Types = new XElement("Types");
            List<DisasterType> types = GetDisasterTypes();
            foreach (DisasterType item in types)
            {
                XElement Type = new XElement("Type");
                XElement Name = new XElement("Name", item.NAME);
                Type.SetAttributeValue("CODE", item.CODE);
                Type.Add(Name);
                Types.AddFirst(Type);
            }
            doc.Root.Add(Types);
            //添加地灾稳定性
            XElement Stabilities = new XElement("Stabilities");
            List<Stability> stabilities = GetStabilities();
            foreach (Stability item in stabilities)
            {
                XElement Type = new XElement("Type");
                XElement Name = new XElement("Name", item.NAME);
                Type.SetAttributeValue("CODE", item.CODE);
                Type.Add(Name);
                Stabilities.AddFirst(Type);
            }
            doc.Root.Add(Stabilities);
            //添加地灾危害性
            XElement Harmfuls = new XElement("Harmfuls");
            List<Harmful> harmfuls = GetHarmfuls();
            foreach (Harmful item in harmfuls)
            {
                XElement Type = new XElement("Type");
                XElement Name = new XElement("Name", item.NAME);
                Type.SetAttributeValue("CODE", item.CODE);
                Type.Add(Name);
                Harmfuls.AddFirst(Type);
            }
            doc.Root.Add(Harmfuls);
            //添加潜在风险
            XElement Risks = new XElement("Risks");
            List<Risk> risks = GetRisks();
            foreach (Risk item in risks)
            {
                XElement Type = new XElement("Type");
                XElement Name = new XElement("Name", item.NAME);
                Type.SetAttributeValue("CODE", item.CODE);
                Type.Add(Name);
                Risks.AddFirst(Type);
            }
            doc.Root.Add(Risks);
            //添加地灾防治方法
            XElement Measure_Rs = new XElement("Measure_Rs");
            List<Measure_R> measure_Rs = GetMeasure_Rs();
            foreach (Measure_R item in measure_Rs)
            {
                XElement Type = new XElement("Type");
                XElement Name = new XElement("Name", item.NAME);
                Type.SetAttributeValue("CODE", item.CODE);
                Type.Add(Name);
                Measure_Rs.AddFirst(Type);
            }
            doc.Root.Add(Measure_Rs);
            //添加联系人
            XElement Contacts = new XElement("Contacts");
            List<Contact> contacts = GetContacts();
            foreach (Contact item in contacts)
            {
                XElement Type = new XElement("Type");
                XElement Name = new XElement("Name", item.NAME);
                Type.SetAttributeValue("CODE", item.CODE);
                Type.Add(Name);
                Contacts.AddFirst(Type);
            }
            doc.Root.Add(Contacts);
            doc.Save(GetXMLFile());