simple file upload

protected void Page_Load(object sender, EventArgs e)
{
if (!IsPostBack)
{
OleDbConnection con = new OleDbConnection(ConfigurationManager.ConnectionStrings["dbconnection"].ToString());
//Open the database connection
con.Open();
OleDbCommand cmd = new OleDbCommand("select * from imagespath", con);
OleDbDataAdapter da = new OleDbDataAdapter(cmd);
DataSet ds = new DataSet();
da.Fill(ds);
gvImages.DataSource = ds;
gvImages.DataBind();
}
}
protected void btnSubmit_Click(object sender, EventArgs e)
{
//Get Filename from fileupload control
string filename = Path.GetFileName(fileuploadimages.PostedFile.FileName);
//Save images into Images folder
fileuploadimages.SaveAs(Server.MapPath("Images/"+filename));
//Getting dbconnection from web.config connectionstring
OleDbConnection con = new OleDbConnection(ConfigurationManager.ConnectionStrings["dbconnection"].ToString());
//Open the database connection
con.Open();
//Query to insert images path and name into database
OleDbCommand cmd = new OleDbCommand("Insert into ImagesPath(ImageName,ImagePath) values('" + filename + "','Images/" + filename + "')", con);
//Passing parameters to query
//cmd.Parameters.AddWithValue("@ImageName", filename);
//cmd.Parameters.AddWithValue("@ImagePath", "Images/" + filename);
cmd.ExecuteNonQuery();
//Close dbconnection
con.Close();
Response.Redirect("~/Default.aspx");
}