Retrieving subsites under the topsite to a spgridview using SharePoint Default WebServices

using System;
using System.Data;
using System.Configuration;
using System.Collections;
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 Webs;
using System.Xml;
public partial class Default11 : System.Web.UI.Page
{
DataSet dset = new DataSet();
//DataSet dset1 = new DataSet();
//DataTable dt = new DataTable();
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
//Prasad.Lists listService = new Prasad.Lists();
Webs.Webs web_Service = new Webs.Webs();
web_Service.UseDefaultCredentials=true;
web_Service.Url = "http://vlnrm:100/_vti_bin/webs.asmx";
System.Xml.XmlNode nodeListItems = web_Service.GetWebCollection();
DataSet ds = getData(nodeListItems);
DataTable dt = ds.Tables["Web"];
GridView1.DataSource = dt;
GridView1.DataBind();
Response.Write(""); Response.Write(""); Response.Write(""); Response.Write(""); for (int i = 0; i < dt.Rows.Count; i++) { string strTitle = dt.Rows[i]["Title"].ToString(); string strUrl = dt.Rows[i]["Url"].ToString(); Response.Write(""); Response.Write(""); Response.Write(""); } Response.Write("

"); Response.Write("Subsites List"); Response.Write("

"); Response.Write(""+strTitle+""); Response.Write("

");
}
}
public DataSet getData(XmlNode xmlnodeinput)
{
if (xmlnodeinput != null)
{
XmlTextReader xtr = new XmlTextReader(xmlnodeinput.OuterXml, XmlNodeType.Element, null);
//dataset = new DataSet();
dset.ReadXml(xtr);
}
return dset;
}
/*public DataSet getData1(XmlNode xmlnodeinput)
{
if (xmlnodeinput != null)
{
XmlTextReader xtr = new XmlTextReader(xmlnodeinput.OuterXml, XmlNodeType.Element, null);
//dataset = new DataSet();
dset1.ReadXml(xtr);
}
return dset1;
}*/

}