how do i upload files on database

SqlConnection cn=new SqlConnection("put_conn_str");
String query = @"INSERT INTO ImagesStore (OriginalPath,ImageDarta) Values (@path,@data)";
SqlCommand cmd=new SqlCommand(query,cn);

//read file
byte []barray=System.IO.File.ReadAllBytes(dlg.FileName);

//extract the filename only from the selected path
string filename=System.IO.Path.GetFileName(dlg.FileName);

// create sql parameters

cmd.Parameters.Add("@path",SqlDbType.VarChar,100).Value=filename;
cmd.Parameters.Add("@data",SqlDbType.Image,barray.Length).Value=barray;

cn.Open();
cmd.ExecuteNonQuery();
cn.Close();