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标题: 急，求助一个问题 [打印本页]

作者: /可爱WEBMAN 时间: 2012-3-28 04:47
标题: 急，求助一个问题
报错：
值不能为 null。
参数名: relativeUrl
调试均无错误
protected void Page_Init(object sender, EventArgs e)
      {
            InitMenu();
      }
      private void InitMenu()
      {
         IList<menu> menus = new List<menu>();
         menus = MenuService.GetMenuTree();
         ExtAspNet.Tree tree = new ExtAspNet.Tree();
         Region2.Items.Add(tree);
         tree.ShowBorder = false;
         tree.ShowHeader = false;
         tree.AutoScroll = true;
         tree.EnableArrows = true;
         ResolveMenuTree(menus, 0, tree.Nodes);
      }
      /// <summary> /// 生成菜单树 /// </summary>
      /// <param name="menus"></param>
      /// <param name="parentMenuId"></param>
      /// <param name="nodes"></param>
      /// <returns>当前节点的子节点个数</returns>
      ///
      private int ResolveMenuTree(IList<menu> menus, int parentMenuId, ExtAspNet.TreeNodeCollection nodes)
      {
         int count = 0;
         foreach (menu menu in menus)
         {
            if (menu.pk_parentmenu == parentMenuId)
            {
                  ExtAspNet.TreeNode node = new ExtAspNet.TreeNode();
                  nodes.Add(node);
                  node.Text = menu.menuname;
                  node.IconUrl = menu.imageurl;
                  if (!String.IsNullOrEmpty(menu.navifateurl))
                  {
                     node.NavigateUrl = menu.navifateurl;
                     node.Target = "main";
                  }
                  int childCount = ResolveMenuTree(menus, menu.pk_menu, node.Nodes);
                  if (childCount == 0)
                  {
                     node.Leaf = true;
                  }
                  count++;
            }
         }
         return count;
      }

堆栈跟踪:

[ArgumentNullException: 值不能为 null。参数名: relativeUrl] System.Web.UI.Control.ResolveUrl(String relativeUrl) +2813231 ExtAspNet.IconHelper.GetResolvedIconUrl(Icon icon, String iconUrl) +91 ExtAspNet.ControlBase.GetResolvedIconUrl(Icon icon, String iconUrl) +35 ExtAspNet.Tree.GetNodesJSONArray(TreeNodeCollection nodes) +741 ExtAspNet.Tree.get_X_Nodes() +25[TargetInvocationException: 调用的目标发生了异常。] System.RuntimeMethodHandle._InvokeMethodFast(IRuntimeMethodInfo method, Object target, Object[] arguments, SignatureStruct& sig, MethodAttributes methodAttributes, RuntimeType typeOwner) +0 System.RuntimeMethodHandle.InvokeMethodFast(IRuntimeMethodInfo method, Object target, Object[] arguments, Signature sig, MethodAttributes methodAttributes, RuntimeType typeOwner) +72 System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks) +335 System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) +28 System.Reflection.RuntimePropertyInfo.GetValue(Object obj, BindingFlags invokeAttr, Binder binder, Object[] index, CultureInfo culture) +63 System.Reflection.RuntimePropertyInfo.GetValue(Object obj, Object[] index) +19 ExtAspNet.ControlBase.GetPropertyJSONValue(String prop) +77 ExtAspNet.XState.CalculateModifiedProperties() +147 ExtAspNet.ControlBase.OnPreRender(EventArgs e) +106 System.Web.UI.Control.PreRenderRecursiveInternal() +103 System.Web.UI.Control.PreRenderRecursiveInternal() +175 System.Web.UI.Control.PreRenderRecursiveInternal() +175 System.Web.UI.Control.PreRenderRecursiveInternal() +175 System.Web.UI.Control.PreRenderRecursiveInternal() +175 System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2496

作者: 水若寒冰 时间: 2012-3-28 13:36
本帖最后由水若寒冰于 2012-3-28 13:40 编辑

你调试肯定没仔细看，relativeurl不能为空。你就找下呗

作者: 第一滴冰雨 时间: 2012-3-28 13:40
什么意思，有点没看明白。

作者: 水若寒冰 时间: 2012-3-28 13:43
你能确定你得node.IconUrl = menu.imageurl;每个都有值吗

作者: 水若寒冰 时间: 2012-3-28 13:44
另外你看这个foreach (menu menu in menus)，两个menu如何区分

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