Visual webpart dropdown values dont get populated

Hi I have a visual webpart dropdown menu which populates all the folders name of the document library. When I run the webpart in debug mode, it populates all the folders correctly. After I deploy the webpart, If I drag and drop from the webpart gallery, the dropdown value does not get populated(just display emtpy dropdown). What am I doing wrong? Below is the code

Do I have to include doc library code inside the initializeControl()?

protected override void OnInit(EventArgs e)
        {
            base.OnInit(e);
            InitializeControl();
        }

        protected void Page_Load(object sender, EventArgs e)
        {
            if (!Page.IsPostBack)
            {
                Guid webId = SPContext.Current.Web.ID;
                Guid SiteId = SPContext.Current.Site.ID;
                SPSecurity.RunWithElevatedPrivileges(delegate()
                {
                    using (SPSite oSite = new SPSite(SiteId))
                    {
                        using (SPWeb site = oSite.OpenWeb(webId))
                        {
                            GetDocLibraryFolder(site, "SharePointDocLibrary");
                        }
                    }

                });
            }
        }

        private void GetDocLibraryFolder(SPWeb oWeb, string Docl)
        {
            SPList doclibs = oWeb.Lists[Docl];
            DropDownList1.Items.Add("");
            foreach (SPListItem myItemfolder in doclibs.Folders)
            {
                if (mycondition == value)
                {
                    DropDownList1.Items.Add(myItemfolder.Name);
                }
            }
           
        }

Many thanks in advance for suggestion or rearrange the code.