asp.net怎么选择数据库表、字段生成XML文档

我现在能生成一个表的XML
  但是我要是点击LEFT JOIN  或者 RIGHT JOIN 的时候  继续选择另一个表和字段 生成XML
就想页面的数据重新加载一下   求大神解决啊  
   或者有个项目列子最好啊

public class ClientUIConfigSetting

{

    public ClientUIConfigSetting()

    {

        this.ClientUITypeSetCollection = new List<ClientUIType>();

    }

    public bool HasRemarks { get; set; }

}



--调用，转换成XML

edm.ClientUIConfigSetting = XmlUtility.ObjectToXml(dataModel.ClientUIConfigSetting, true, typeof(ClientUIConfigSetting));

edm.AllowAdHocInput = dataModel.AllowAdHocInput;

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Text;

using System.Reflection;

using System.Xml;

using System.Xml.Serialization;

using System.IO;

using GlacierICR.Common.WorkDataTypes;



namespace GlacierICR.DAL

{

    public static class XmlUtility

    {

        public static string ObjectToXml(object obj, bool toBeIndented, Type type)

        {

            if (obj == null)

            {

                throw new ArgumentNullException("obj");

            }



            UTF8Encoding encoding = new UTF8Encoding(false);

            XmlSerializer serializer = new XmlSerializer(type);

            MemoryStream stream = new MemoryStream();

            XmlTextWriter writer = new XmlTextWriter(stream, encoding);

            writer.Formatting = (toBeIndented ? Formatting.Indented : Formatting.None);

            serializer.Serialize(writer, obj);

            string xml = encoding.GetString(stream.ToArray());

            writer.Close();

            return xml;

        }



        public static object XmlToObject(string xml, Type type)

        {

            if (xml == null)

            {

                throw new ArgumentNullException("xml");

            }

            object o = null;

            XmlSerializer serializer = new XmlSerializer(type);

            StringReader strReader = new StringReader(xml);

            XmlReader reader = new XmlTextReader(strReader);

            try

            {

                o = serializer.Deserialize(reader);

            }

            catch (InvalidOperationException e)

            {

                throw e;

            }

            catch (Exception e)

            {

                throw e;

            }

            finally

            {

                reader.Close();

            }

            return o;

        }



    }

}