Bind List To DDL (Dificulty)

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private void BindLocationsDDL() 
        { 
            try 
            { 
                ddlLocations.AppendDataBoundItems = true; 
                //ddlLocations.AutoPostBack = true; 
                ddlLocations.Items.Clear(); 
                ddlLocations.Items.Add(new ListItem("---Select Location---", "-1")); 
                //SPSecurity.RunWithElevatedPrivileges(delegate() 
                //{ 
                using (SPSite objSite = new SPSite(SPContext.Current.Site.Url)) 
                { 
                    using (SPWeb objWeb = objSite.OpenWeb()) 
                    { 
                        if (!string.IsNullOrEmpty(strLocation)) 
                        { 
                            SPList objLocationList = objWeb.Lists[strLocation]; 
                            DataTable dtLocations = new DataTable(); 
                            if (objLocationList.Items.Count > 0) 
                            { 
                                dtLocations = objLocationList.Items.GetDataTable(); 
                                ddlLocations.DataSource = dtLocations; 
                                ddlLocations.DataTextField = "LocationName"; 
                                ddlLocations.DataValueField = "ID"; 
                                ddlLocations.DataBind(); 
                            } 
                            else 
                            { 
                                lblerror.Visible = true; 
                                lblerror.Text += "There is no Locations in " + strLocation + " list"; 
                            } 
  
                        } 
                        else 
                        { 
                            lblerror.Visible = true; 
                            lblerror.Text += "There is no list for Locations"; 
                        } 
                    } 
                } 
                // }); 
            } 
            catch (Exception ex) 
            { 
  
                lblerror.Visible = true; lblerror.ForeColor = Color.Red; lblerror.Text += "Error : " + ex.Message; 
            } 
        }

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