如何让WebServer返回指定XML内容

　　通过创立WEBServer代理可以当作本地类应用，但能不能返回指定的XML呢？比如通过checkpass服务检测帐号和密码之后要返回该用户拥有的权限列表。怎么实现呢？

　　ASP.NET Web服务支撑在公共语言运行时中支撑的所有基础数据类型,包含String,integer,Long等等。除了简略的基础数据类型之外，还支撑基础数据类型的数组。

　　但是，更有趣的是支撑用户定义的类和结构体。基础上，任何可由ＸＳＤ模式代表的类型都是可以作为ASP.NET的参数或返回类型。

　　通过一个星期的摸索，解决了这个标题，并学习了如何读取和输出XML文档；数据库把持；WebServer的创立和引用。下面就部分源码供初学习者参考，不足之此请指正。

/*CheckLogin服务*/

using System;
using System.Web;
using System.Collections;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.Configuration;
using System.Data;
using System.Data.SqlClient;
using mysql.SQL;
using myfunc.Common;

///

/// CheckLogin 的摘要阐明
///

[WebService(Namespace = "http://localhost/")]
[WebServiceBinding(COnformsTo= WsiProfiles.BasicProfile1_1)]
public class CheckLogin : System.Web.Services.WebService {

    public CheckLogin () {

        //假如应用设计的组件，请取消注释以下行
        //InitializeComponent();
    }

    //[WebMethod(Description = "Login", EnableSession = true)]
    [WebMethod]
    public checkuser Login(string sUserCode, string sPassword)
    {
        checkuser objcheckuser= new checkuser();
        string sCheckLogin = ConfigurationManager.AppSettings["strCheckLogin"];
        SqlShell objShell = new SqlShell();
        SqlCommand objCommand = new SqlCommand(sCheckLogin);
        objCommand.CommandType = CommandType.Text;
        objCommand.Parameters.AddWithValue("@sUserCode", sUserCode);
        objCommand.Parameters.AddWithValue("@sPassword", sPassword);
        DataTable objDataTable = objShell.executeDataSet(ref objCommand).Tables[0];
        objcheckuser.logined = (objDataTable.Rows.Count > 0);
        if (objcheckuser.logined)
        {
            //帐号和密码准确,反回帐号信息
            DataRow objDataRow = objDataTable.Rows[0];
            objcheckuser.userid = objDataRow["UserID"].ToString().Trim(); ;
            objcheckuser.pass = objDataRow["Pass"].ToString().Trim();
            objcheckuser.username = objDataRow["UserName"].ToString().Trim();

            //检查Allow字段是否为空
            if (objDataRow.IsNull("Allow")) { objcheckuser.allow = ""; }
            else { objcheckuser.allow = objDataRow["Allow"].ToString().Trim(); }

            menulist objmenulist = new menulist(objDataRow["UserID"].ToString().Trim());
            objcheckuser.menuxml = objmenulist.buf;//返回菜单列表的XML字符串
                 

        }
        return objcheckuser;

    }

    public class checkuser
    {
        public bool logined;
        public string userid;
        public string pass;
        public string username;
        public string allow;
        public string menuxml;//返回菜单列表的XML字符串

    }

}

/*CheckLogin服务结束*/

 

/*menulist 类开端*/

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Xml;
using Singcn.SQL;
using System.Data.SqlClient;
using System.IO;
using System.Text;

namespace myfunc.Common
{
    ///

    /// PubFunc 的摘要阐明
    ///

    public class menulist
    {
        public XmlWriterSettings settings = new XmlWriterSettings();
        public XmlWriter writer = null;
        public string buf = "";
        public SqlShell objShell;
        public SqlCommand objCommand;
        public DataTable objDataTable;

        public menulist(string userid)
        {
            objShell = new SqlShell();
            objCommand = new SqlCommand("select * from qxdmb order by jb,px,qxdm");
            objCommand.CommandType = CommandType.Text;
            objDataTable = objShell.executeDataSet(ref objCommand).Tables[0];

            StringWriter writerstr = new StringWriter();
            settings.Indent = true;
            settings.Encoding = Encoding.GetEncoding("utf-8");
            try
            {
                writer = XmlWriter.Create(writerstr, settings);

                writer.WriteStartDocument();
                writer.WriteStartElement("DSTreeRoot");
                writer.WriteAttributeString("text", "后台治理系统-[" userid "]");