topic.cs

ASP开发网站的 关于网站的设计和说明 还有SQL的程序 数据库

namespace ASPNET.StarterKit.Communities {

    using System;
    using System.Web.UI;
    using System.Web.UI.WebControls;
    using ASPNET.StarterKit.Communities;


    //*********************************************************************
    //
    // Topic Class
    //
    // Represents the topic page. This class 
    // displays a list of article listings.
    //
    //  _skinFileName = the name of the skin to use for this section
    //
    //  _getContentItems = the name of the method that retrieves the list of content items 
    //
    //*********************************************************************

    public class Topic : ContentListPage {
    
        string _skinFileName = "Topics_Topic.ascx";

        GetContentItemsDelegate _getContentItems = new GetContentItemsDelegate(TopicUtility.GetTopicContent);

        Image imgTopicImage;
        Label lblTopicTitle;
        Label lblTopicDescription;        

        private TopicInfo objTopicInfo;


        //*********************************************************************
        //
        // TopicID Property
        //
        // Stores the ID of the current topic in view state
        //
        //*********************************************************************

        int TopicID {
            get { return (int)ViewState["TopicID"]; }
            set { ViewState["TopicID"] = value; }
        }


        //*********************************************************************
        //
        // InitializeSkin Method
        //
        // Retrieves all the controls from the Page Skin
        //
        //*********************************************************************


        void SkinLoadTopic(Object s, SkinLoadEventArgs e) {
            // Find Topic Image
            imgTopicImage = (Image)GetControl(e.Skin, "TopicImage");
            
            // Find Topic Title
            lblTopicTitle = (Label)GetControl(e.Skin, "TopicTitle");
        
            // Find Topic Description
            lblTopicDescription = (Label)GetControl(e.Skin, "TopicDescription");
        } 
        


        //*********************************************************************
        //
        // OnInit Method
        //
        // Here we check whether a topic was passed in a query string.
        //
        //*********************************************************************
        protected override void OnInit(EventArgs e) {
            
            if (!Page.IsPostBack) {
                
                // If no topic, go home
                if (Context.Request.QueryString["Topic"] == null)
                    Context.Response.Redirect("~/Default.aspx");
            }
        }




        //*********************************************************************
        //
        // OnLoad Method
        //
        // Handles the Page Load event in order to initialize the current page
        // by assigning values to the controls.
        //
        //*********************************************************************

        protected override void OnLoad(EventArgs e) {
        
            if (!Page.IsPostBack) {
                
                string _topicName = Context.Request.QueryString["Topic"];
  
                // Get TopicInfo
                objTopicInfo = TopicUtility.GetTopicFromName(_topicName);
  
 
                // Store topicID in view state
                TopicID = objTopicInfo.ID;

                // Get total records
                TotalRecords = TopicUtility.GetTotalRecords(TopicID);
               
              
                // Create the controls
                EnsureChildControls();                      

                // Display Topic Image
                if (objTopicInfo.Image != String.Empty)
                    imgTopicImage.ImageUrl = Page.ResolveUrl(objTopicInfo.Image);
                else
                    imgTopicImage.Visible = false;
                
                // Display Topic Title
                lblTopicTitle.Text = objTopicInfo.Name;
                
                // Display Topic Description
                lblTopicDescription.Text = objTopicInfo.Description;
            }
        }


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





        //*********************************************************************
        //
        // Topic Constructor
        //
        // Assigns skin and contentItems method to base ContentListPage class
        //
        //*********************************************************************

        public Topic() : base() {
            SkinFileName = _skinFileName;
            GetContentItems = _getContentItems;

            // Wire-up event handlers
            this.SkinLoad += new SkinLoadEventHandler(SkinLoadTopic);
        }








    }
}