private void LoadCategories()
{
//转换目录信息列表至树形节点列表
List <RecursiveCategoryData> listRecursive = LocalUtils.ConvertCategoryListToRecursiveList(PortalCategoryList);
RecursiveCategoryItem m_recursiveCategoryRoot;
m_recursiveCategoryRoot = RecursiveHelper.ConvertListToRecursiveItem(listRecursive);
RecursiveHelper.ConvertRecursiveItemToAspNetTree(ref tvCategory, m_recursiveCategoryRoot);
List <CategoryInfo> list = CategoryController.ListByPortals(PortalId);
for (int i = 0; i < list.Count; i++)
{
list[i].Name = Utils.FormatLevelName(list[i].Name, list[i].Level, "..");
}
List <RecursiveCategoryData> listRecursiveData = new List <RecursiveCategoryData>();
listRecursiveData = LocalUtils.ConvertCategoryListToRecursiveList(list);
RecursiveCategoryItem orderedItems = RecursiveHelper.ConvertListToRecursiveItem(listRecursiveData);
ArrayList listCategory = orderedItems.GetListOrdered();
RecursiveCategoryItem a = new RecursiveCategoryItem();
a.Id = -1;
a.Name = Localization.GetString("SelectCategory.Text", this.LocalResourceFile);
listCategory.Add(a);
ddlCategory.DataSource = listCategory;
ddlCategory.DataBind();
ddlCategory.SelectedValue = "-1";
}