i want to upload file using asp.net

<%@ Page Language="C#" MasterPageFile="~/phoenix.master" AutoEventWireup="true" CodeFile="RegisterationForm.aspx.cs" Inherits="RegisterationForm" Title="Phoenix Technology" %>

<asp:Content ID="Content1" ContentPlaceHolderID="head" Runat="Server">

    <style type="text/css">

        .style2
        {
            width: 497px;
            margin-left: 200px;
        }
        .style3
        {
            height: 2px;
            width: 42%;
        }
        .style4
        {
            width: 497px;
            margin-left: 200px;
            height: 2px;
        }
        .style8
        {
            width: 497px;
            margin-left: 200px;
            height: 31px;
        }
        .style5
        {
            height: 16px;
            width: 42%;
        }
        .style6
        {
            width: 497px;
            margin-left: 200px;
            height: 16px;
        }
        .style1
        {
            height: 58px;
        }
        .style9
        {
            width: 42%;
        }
        .style10
        {
            width: 42%;
            height: 41px;
        }
        .style11
        {
            width: 497px;
            margin-left: 200px;
            height: 41px;
        }
        .banner_img
        {
            height: 946px;
        }
        .style12
        {
            width: 42%;
            height: 51px;
        }
        .style13
        {
            width: 497px;
            margin-left: 200px;
            height: 51px;
        }
        .style14
        {
            width: 42%;
            height: 66px;
        }
        .style15
        {
            width: 497px;
            margin-left: 200px;
            height: 66px;
        }
        </style>

<asp:Content ID="Content2" runat="server" 
    contentplaceholderid="ContentPlaceHolder4">
        <div id="body" style="height: 1117px">
        <script language="javascript" >
            function validate() {
                var name = document.getElementById("<%=txt_name.ClientID %>")
                var email = document.getElementById("<%=txt_email.ClientID%>")
                var country = document.getElementById("<%=txt_country.ClientID%>")
                var address = document.getElementById("<%=txt_address.ClientID%>")
                var state = document.getElementById("<%=txt_state.ClientID%>")
                var city = document.getElementById("<%=txt_city.ClientID%>")
                var area = document.getElementById("<%=DropDownList1.ClientID%>")
                var yearofexperience = document.getElementById("<%=txt_yoe.ClientID%>")
                var mobile = document.getElementById("<%=txt_mobile.ClientID%>")
                var upload = document.getElementById("<%=uploadResume.ClientID%>")

                if (name.value == "") {
                    alert("Name cannot be blank");
                    name.focus();
                    return false;
                }

                if (email.value == "") {
                    alert("Email id cannot be blank");
                    email.focus();
                    return false;
                }
                if (area.value == "") {
                    alert("should be mandatory");
                    area.focus();
                    return false;
                }
                if (yearofexperience.value == "") {
                    alert("should be mandatory");
                    yearofexperience.focus();
                    return false;
                }
                if (mobile.value == "") {

                    alert("should not be null");
                    mobile.focus();
                    return false;
                }

//                if (mobile.value == String) {
//                    alert("Enter only number");
//                    mobile.focus();
//                    return false;
//                }
                //            if (mobile.nodeValue<10)
                //            {
                //            alert("Enter only 10 digit number");
                //            mobile.focus();
                //            return false;
                //             
                //             }
                if (city.value == "") {
                    alert("should be mandatory");
                    city.focus();
                    return false;
                }
                if (state.value == "") {
                    alert("should be mandatory");
                    state.focus();
                    return false;
                }
                if (country.value == "") {
                    alert("should be mandatory");
                    country.focus();
                    return false;
                }
                if (address.value == "") {
                    alert("should be mandatory");
                    address.focus();
                    return false;
                }
                if(upload.value="No file selected.")
                {
                    alert("upload the resume");
                    upload.focus();
                    return false;              
                }

                var emailPat = /^([A-Za-z0-9_\-\.])+\@([A-Za-z0-9_\-\.])+\.([A-Za-z]{2,4})$/;
                var emailid = email.value;
                var matchArray = emailid.match(emailPat);
                if (matchArray == null) {
                    alert("Your email address seems incorrect. Please try again.");
                    email.focus();
                    return false;
                }
//                if (addinfo.value == "") {
//                    alert("Additional Information cannot be blank");
//                    addinfo.focus();
//                    return false;
//                }
            }
       
function resume_onclick() {

}

function upload_onclick() {

}

</script>

            <div class="updown">
                <div class="banner_menu">
                    <div class="both">
                    </div>
                </div>
            </div>
            <div class="banner_slide">
                <div class="banner_img">
                
                                      
                                                                                                                                                   
                        <asp:Label ID="lbl_date" runat="server">                         
                        
                    <br />
                    <br />
                    
                    <table align="center" cellpadding="5">
                                style="width: 812px; margin-removed 0px">
                                <tr>
                                    <asp:Label ID="Label1" runat="server" Text="Registration " 
                        Font-Bold="True" Font-Size="XX-Large" ForeColor="Black" 
                        Font-Names="raavi">
                                <asp:Label ID="Label2" runat="server" Text="Form" 
                        Font-Size="XX-Large" Font-Bold="True" ForeColor="#C60000" 
                        Font-Names="raavi">
                                </tr>
                        <tr>
                            <td class="style10">
                                style="font-family: 'raavi'; font-size: large; font-weight: normal; font-style: normal; font-variant: normal; text-transform: none; color: #5F5F5F" align="justify">
                                Name</td>
                            <td class="style11">
                                <asp:TextBox ID="txt_name" runat="server" Width="184px">
                                      
                            </td>
                        </tr>
                        <tr>
                            <td class="style12">
                                style="font-family: 'raavi'; font-size: large; font-weight: normal; font-style: normal; font-variant: normal; text-transform: none; color: #5F5F5F" 
                                align="justify">
                                Qualification</td>
                            <td class="style13">
                                <asp:DropDownList ID="droplst_qulification" runat="server" AutoPostBack="False" 
                                    Height="30px" Width="182px">
                                    <asp:ListItem>
                                    <asp:ListItem>B.E(Computer Science Engineering)
                                    <asp:ListItem>B.E(Information Technology)
                                    <asp:ListItem>B.E(Electronics and Communication)
                                    <asp:ListItem>B.E(Electricals and Electronics)
                                    <asp:ListItem>B.E(Mechanical Engineering)
                                    <asp:ListItem>MBA
                                    <asp:ListItem>MCA
                                    <asp:ListItem>B.Sc
                                    <asp:ListItem>M.Sc
                                    <asp:ListItem>BBA
                                    <asp:ListItem>Diploma
                                    <asp:ListItem>Others..
                                    <asp:ListItem>
                                
                                       
                            </td>
                        </tr>
                        <tr>
                            <td class="style14">
                                style="font-family: 'raavi'; font-size: large; font-weight: normal; font-style: normal; font-variant: normal; text-transform: none; color: #5F5F5F" 
                                align="justify">
                                Area of Interest
                            <td class="style15">
                                
                                <asp:DropDownList ID="DropDownList1" runat="server" AutoPostBack="False" 
                                    Height="30px" Width="171px">
                                    <asp:ListItem>
                                    <asp:ListItem>C
                                    <asp:ListItem>C++
                                    <asp:ListItem>JAVA
                                    <asp:ListItem>.NET
                                    <asp:ListItem>PHP
                                    <asp:ListItem>VOICE
                                    <asp:ListItem>NON-VOICE
                                    <asp:ListItem>MAINFRAME
                                    <asp:ListItem>Others...
                                             
                            </td>
                        </td></tr>
                     
                        <tr>
                            <td class="style9" style="font-family: 'raavi'; font-size: large; font-weight: normal; font-style: normal; font-variant: normal; text-transform: none; color: #5F5F5F" align="justify">
                                Years of Experience </td>
                            <td class="style2">
                                <asp:TextBox ID="txt_yoe" runat="server" MaxLength="2" Width="24px">
                                                                                      
                            </td>
                        </tr>
                        <tr>
                            <td class="style3" style="font-family: 'raavi'; font-size: large; font-weight: normal; font-style: normal; font-variant: normal; text-transform: none; color: #5F5F5F" align="justify">
                                Mobile</td>
                            <td class="style4">
                                <asp:TextBox ID="txt_mbno" runat="server" Height="23px" MaxLength="3" 
                                    ReadOnly="True" style="margin-top: 0px" Width="56px">+91
                                  <asp:TextBox ID="txt_mobile" runat="server" MaxLength="10" Width="117px" >      
                            </td>
                        </tr>
                        <tr>
                            <td class="style9" style="font-family: 'raavi'; font-size: large; font-weight: normal; font-style: normal; font-variant: normal; text-transform: none; color: #5F5F5F" align="justify">
                                                                              E-mail ID</td>
                            <td class="style8">
                                <asp:TextBox ID="txt_email" runat="server" Width="184px">
                                   
                            </td>
                        </tr>
                        <tr>
                            <td class="style5" style="font-family: 'raavi'; font-size: large; font-weight: normal; font-style: normal; font-variant: normal; text-transform: none; color: #5F5F5F" align="justify">
                                 Address</td>
                            <td class="style6">
                                <asp:TextBox ID="txt_address" runat="server" Height="90px" TextMode="MultiLine" 
                                    Width="184px">
                                 </td>
                        </tr>
                        <tr>
                            <td class="style9" style="font-family: 'raavi'; font-size: large; font-weight: normal; font-style: normal; font-variant: normal; text-transform: none; color: #5F5F5F" align="justify">
                                Country</td>
                            <td class="style2">
                                <asp:TextBox ID="txt_country" runat="server" Width="184px">
                            </td>
                        </tr>
                        <tr>
                            <td class="style9" style="font-family: 'raavi'; font-size: large; font-weight: normal; font-style: normal; font-variant: normal; text-transform: none; color: #5F5F5F" align="justify">
                                City</td>
                            <td class="style2">
                                <asp:TextBox ID="txt_city" runat="server" Width="184px">
                            </td>
                        </tr>
                        <tr>
                            <td class="style9" style="font-family: 'raavi'; font-size: large; font-weight: normal; font-style: normal; font-variant: normal; text-transform: none; color: #5F5F5F" align="justify">
                                State</td>
                            <td class="style2">
                                <asp:TextBox ID="txt_state" runat="server" Width="184px">
                            </td>
                        </tr>
                        <tr>
                            <td class="style9" style="font-family: 'raavi'; font-size: large; font-weight: normal; font-style: normal; font-variant: normal; text-transform: none; color: #5F5F5F" align="justify">
                                Upload Resume</td>
                            <td class="style2">
                                 <asp:FileUpload ID="uploadResume" runat="server" Height="29px" 
                                    Width="218px" />
         
                                <td>
                                     </td>
            </td></tr>
            <tr>
                <td>
                     
                </td>
                <td>
                     
                </td>
            </tr>
            <tr>
                <td>
                     </td>

                        </tr>
                        <tr>
                            <td align="center" class="style1" colspan="2">
                                <asp:Button ID="Button1" runat="server" onclick="Button1_Click" 
                                    OnClientClick="return validate();" Text="Submit" Height="36px" />
                                <br />
                                <br />
                            </td>
                        </tr>
                    </table>
                </div>
            </div>
        </div>

using System;
using System.Collections;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Xml.Linq;
using System.Xml;
using System.IO;


public partial class RegisterationForm : System.Web.UI.Page
{

    protected void Page_Load(object sender, EventArgs e)
    {
        lbl_date.Visible = false;
    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        lbl_date.Text = DateTime.Today.ToShortDateString();

        XmlDocument xmldoc = new XmlDocument();
        xmldoc.Load(Server.MapPath("formxml.xml"));
        XmlElement parentelement = xmldoc.CreateElement("registeration");
        XmlElement Date = xmldoc.CreateElement("Date");
        Date.InnerText = lbl_date.Text;

        XmlElement Name = xmldoc.CreateElement("Name");
        Name.InnerText = txt_name.Text;
        XmlElement Qualification = xmldoc.CreateElement("Qualification");
        Qualification.InnerText = droplst_qulification.Text;
        XmlElement areaofinterest = xmldoc.CreateElement("areaofinterest");
        areaofinterest.InnerText = DropDownList1.Text;
        XmlElement yearofexperience = xmldoc.CreateElement("yearofexperience");
        yearofexperience.InnerText = txt_yoe.Text;
        XmlElement Mobile = xmldoc.CreateElement("Mobile");
        Mobile.InnerText = txt_mobile.Text;
        XmlElement EmailID = xmldoc.CreateElement("EmailID");
        EmailID.InnerText = txt_email.Text;
        XmlElement Address = xmldoc.CreateElement("Address");
        Address.InnerText = txt_address.Text;
        XmlElement Country = xmldoc.CreateElement("Country");
        Country.InnerText = txt_country.Text;
        XmlElement City = xmldoc.CreateElement("City");
        City.InnerText = txt_city.Text;
        XmlElement state = xmldoc.CreateElement("state");
        state.InnerText = txt_state.Text;
        string pathname ="C:\\Documents and Settings\\Sweet Pc\\Desktop\\WebSite12\\uploadResume\\";
        string filename = uploadResume.FileName;
        string fullpath = pathname + filename;
        XmlElement Resume = xmldoc.CreateElement("Resume");
        Resume.InnerText = fullpath;

        parentelement.AppendChild(Date);
        parentelement.AppendChild(Name);
        parentelement.AppendChild(Qualification);
        parentelement.AppendChild(areaofinterest);
        parentelement.AppendChild(yearofexperience);
        parentelement.AppendChild(Mobile);
        parentelement.AppendChild(EmailID);
        parentelement.AppendChild(Address);
        parentelement.AppendChild(Country);
        parentelement.AppendChild(City);
        parentelement.AppendChild(state);
        parentelement.AppendChild(Resume);

        xmldoc.DocumentElement.AppendChild(parentelement);
        xmldoc.Save(Server.MapPath("formxml.xml"));
        uploadResume.SaveAs(Server.MapPath("uploadResume\\" + uploadResume.FileName));

        txt_name.Text = "";
        droplst_qulification.Text = "";
        DropDownList1.Text = "";
        txt_yoe.Text = "";
        txt_mobile.Text = "";
        txt_email.Text = "";
        txt_address.Text = "";
        txt_country.Text = "";
        txt_city.Text = "";
        txt_state.Text = "";
    }}

<registeration>
  <date>
  </date>
  <name>
  </name>
  <qualification>
  </qualification>
  <areaofinterest>
  </areaofinterest>
  <yearofexperience>
  </yearofexperience>
  <mobile>
  </mobile>
  <emailid>
  </emailid>
  <address>
  </address>
  <country>
  </country>
  <city>
  </city>
  <state>
  </state>
  <resume>
  </resume>
  <registeration>
    <date>8/1/2013</date>
    <name>Rajesh</name>
    <qualification>B.E(Computer Science Engineering)</qualification>
    <areaofinterest>C</areaofinterest>
    <yearofexperience>7</yearofexperience>
    <mobile>576</mobile>
    <emailid>hsdof</emailid>
    <address>sflvjl</address>
    <country>sjf</country>
    <city>jflsvg</city>
    <state>jdpsvj</state>
    <resume> C:\Documents and Settings\Administrator\Desktop\older\phoenix\uploadresume\Rajesh Resume (2).doc</resume>
  </registeration>
  <registeration>
    <date>8/1/2013</date>
    <name>rt</name>
    <qualification>B.E(Computer Science Engineering)</qualification>
    <areaofinterest>C++</areaofinterest>
    <yearofexperience>t</yearofexperience>
    <mobile>tryr</mobile>
    <emailid>fghf</emailid>
    <address>gfh</address>
    <country>fgh</country>
    <city>fghmk</city>
    <state>gfh</state>
    <resume> C:\Documents and Settings\Administrator\Desktop\older\phoenix\uploadresumeRajesh Resume (2).doc</resume>
  </registeration>
  <registeration>
    <date>8/1/2013</date>
    <name>post</name>
    <qualification>B.E(Computer Science Engineering)</qualification>
    <areaofinterest>C++</areaofinterest>
    <yearofexperience>7</yearofexperience>
    <mobile>8888888888</mobile>
    <emailid>8</emailid>
    <address>88</address>
    <country>nhu</country>
    <city>hu</city>
    <state>hu</state>
    <resume>C:\Documents and Settings\Sweet Pc\Desktop\WebSite12\uploadResume\Rajesh Resume (2).doc</resume>
  </registeration>
  <registeration>
    <date>8/7/2013</date>
    <name>ram</name>
    <qualification>B.E(Electronics and Communication)</qualification>
    <areaofinterest>JAVA</areaofinterest>
    <yearofexperience>2</yearofexperience>
    <mobile>56786785</mobile>
    <emailid>redfg</emailid>
    <address>erg</address>
    <country>efdgh</country>
    <city>refgd</city>
    <state>dfsg</state>
    <resume>C:\Documents and Settings\Sweet Pc\Desktop\WebSite12\uploadResume\SIVARAJ.doc</resume>
  </registeration>
  <registeration>
    <date>8/7/2013</date>
    <name>rewr</name>
    <qualification>B.E(Computer Science Engineering)</qualification>
    <areaofinterest>C</areaofinterest>
    <yearofexperience>4</yearofexperience>
    <mobile>567457</mobile>
    <emailid>rgfh</emailid>
    <address>fgsnb</address>
    <country>dgshn</country>
    <city>dsgfh</city>
    <state>dfsh</state>
    <resume>C:\Documents and Settings\Sweet Pc\Desktop\WebSite12\uploadResume\SIVARAJ.doc</resume>
  </registeration>
</registeration>