post image or without image with data using asp.net?

ok

code:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Data;
using System.Data.SqlClient;
using System.Configuration;
using System.Drawing;

public partial class Upload : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
string query = "select StateId, StateName from State";
BindDropDownList(ddlState, query, "StateName", "StateId", "Select State");
ddlCity.Enabled = false;
ddlCity.Items.Insert(0, new ListItem("Select City", "0"));
}
Label1.Text = System.DateTime.Now.ToString();
}
private void Clear()
{
txtTitle.Text = txtDescription.Text = txtPrice.Text = txtContactName.Text = txtContactEmail.Text = txtContactMobile.Text = "";
txtTitle.Focus();
}
private void BindDropDownList(DropDownList ddl, string query, string text, string value, string defaultText)
{
string conString = ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString;
SqlCommand cmd = new SqlCommand(query);
using (SqlConnection con = new SqlConnection(conString))
{
using (SqlDataAdapter sda = new SqlDataAdapter())
{
cmd.Connection = con;
con.Open();
ddl.DataSource = cmd.ExecuteReader();
ddl.DataTextField = text;
ddl.DataValueField = value;
ddl.DataBind();
con.Close();
}
}
ddl.Items.Insert(0, new ListItem(defaultText, "0"));
}
protected void btnPostAd_Click(object sender, EventArgs e)
{
string strimage = @"~\ProductImage\" + FileUpload1.FileName;
FileUpload1.PostedFile.SaveAs(Server.MapPath(strimage));
SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["ConnectionString"].ConnectionString);
String strInsert = "insert into ProductsDetails(Categories,CategoriesType,Title,Description,Price,State,City,ContactName,Email,Mobile,Image,DateAdded) values('" + lblMobile.Text + "','" + ddlCategoryType.Text + "','" + txtTitle.Text + "','" + txtDescription.Text + "','" + txtPrice.Text + "','" + ddlState.SelectedItem.Text + "','" + ddlCity.SelectedItem.Text + "','" + txtContactName.Text + "','" + txtContactEmail.Text + "','" + txtContactMobile.Text + "','" + strimage + "','" + Label1.Text + "')";

SqlCommand cmd = new SqlCommand(strInsert, con);
try
{
con.Open();
cmd.ExecuteNonQuery();
lblDisplay.Text = "Your Add has been Posted Successfully";
}
catch (SqlException ex)
{
string errorMessage = "Error in entering competition";
errorMessage += ex.Message;
throw new Exception(errorMessage);
}
finally
{
con.Close();
}
Clear();
}
protected void ddlState_SelectedIndexChanged(object sender, EventArgs e)
{
ddlCity.Enabled = false;
ddlCity.Items.Clear();
ddlCity.Items.Insert(0, new ListItem("Select City", "0"));
int StateID = int.Parse(ddlState.SelectedItem.Value);
if (StateID > 0)
{
string query = string.Format("select CityId, CityName from cities where StateId = {0}", StateID);
BindDropDownList(ddlCity, query, "CityName", "CityId", "Select cities");
ddlCity.Enabled = true;
}
}
}

here postdata working properly
but i want current i have image ok post data properly but dont have image how post data here please reply me

ok

ok now how i can do this process

image storing ok i want optional means i have image upload properly and i dont have image not upload and storing properly i want

please reply me