modify

web/admin/activity/index.aspx.cs

@@ -14,12 +14,13 @@ using static TreeView;
 public partial class admin_activity_index : MyWeb.config
 {
     private Model.ezEntities _db = new Model.ezEntities();
+    public string IsPreOrder = "false";
     protected void Page_Load(object sender, EventArgs e)
     {
 
         if (!IsPostBack)
         {
-
+            IsPreOrder = ConfigurationManager.AppSettings["IsPreOrder"];
             BuildKind();
 
         }