contentlistpage.cs

一个ASP.NET下的中文内容管理和社区系统

namespace ASPNET.StarterKit.Communities {
    using System;
    using System.Web.UI;
    using System.Web.UI.WebControls;
    using System.Collections;


    public delegate ArrayList GetContentItemsDelegate(string username, int sectionID, int pageSize, int pageIndex, string sortOrder);



    //*********************************************************************
    //
    // ContentListPage Class
    //
    // The base class for all the content list pages. 
    // e.g., Article Section, Book Section, Events Section page
    //
    //*********************************************************************
    public abstract class ContentListPage : SkinnedCommunityControl {


       
        public GetContentItemsDelegate GetContentItems;
        public event SkinLoadEventHandler SkinLoad; 


        protected ContentList objContentList;
        protected Sorter objSorter = null;




        //*********************************************************************
        //
        // TotalRecords Property
        //
        // Represents the total records that the ContentList will display.
        // This information is used by the ContentList pager.
        //
        //*********************************************************************

        public int TotalRecords {
            get { 
                if (ViewState["TotalRecords"] == null)
                    return -1;
                 else
                    return (int)ViewState["TotalRecords"];
                }
            set { ViewState["TotalRecords"] = value; }
        }







        //*********************************************************************
        //
        // SortOrder Property
        //
        // Represents the sort order of the records when sorting is enabled.
        // Notice that it defaults to "Default" which is ContentPage_SortOrder
        //
        //*********************************************************************

        public string SortOrder {
            get {
                EnsureChildControls();
                if (objSorter != null)
                    return objSorter.SelectedSortOrder;
                else
                    return "Default";
            }
        }


        //*********************************************************************
        //
        // SkinType Property
        //
        // The SkinType will always be ContentSkins
        //
        //*********************************************************************
        override protected string SkinType {
            get { return "ContentSkins"; }
        }



   
    
        //*********************************************************************
        //
        // InitializeSkin Method
        //
        // This method finds the ContentList control and uses the 
        // GetContentItems method to display values
        //
        //*********************************************************************
         override protected void InitializeSkin(Control skin) {
            objContentList = (ContentList)GetControl(skin, "ContentList" );

            // Add sorting
            objSorter = (Sorter)GetOptionalControl(skin, "Sorter");
            if (objSorter != null)
                objSorter.OrderChanged += new EventHandler(ContentList_OrderChanged);


            if (!Page.IsPostBack) {
                    if (TotalRecords == -1)
                        TotalRecords = ContentPageUtility.GetTotalRecords(objSectionInfo.ID);
            }
            objContentList.TotalRecords = TotalRecords;


           // Call Skin Load event 
           OnSkinLoad(this, new SkinLoadEventArgs(skin));
        }





        //*********************************************************************
        //
        // OnSkinLoad Method
        //
        // Raises the SkinLoad event if anyone is listening
        //
        //*********************************************************************

        protected virtual void OnSkinLoad(Object s, SkinLoadEventArgs e){
            if (SkinLoad != null)
                SkinLoad(s, e);
        }


        //*********************************************************************
        //
        // OnPreRender Method
        //
        // We bind on each page request to avoid view state
        //
        //*********************************************************************
        protected override void OnPreRender(EventArgs e) {
            BindContent();
        
        }




        //*********************************************************************
        //
        // ContentList_OrderChanged Method
        //
        // When user selects a new sort order, rebind.
        //
        //*********************************************************************
        
        protected void ContentList_OrderChanged(Object s, EventArgs e) {
            objContentList.CurrentPage = 1;
        }



        //*********************************************************************
        //
        // BindContent Method
        //
        // Binds the data source to the ContentList control. Notice that
        // this method can be overriden in a derived class.
        //
        //*********************************************************************

        protected virtual void BindContent() {
            objContentList.DataSource = GetContentItems(objUserInfo.Username, objSectionInfo.ID, objSectionInfo.RecordsPerPage, objContentList.CurrentPage, SortOrder);
            objContentList.DataBind();
        }


        


    }
}