webboxlist.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 ASPNET.StarterKit.Communities.Services;
    using System.Web.Security;
    using System.Collections;



    //*********************************************************************
    //
    // WebBoxList Class
    //
    // Displays a list of Web box controls. 
    //
    //*********************************************************************

    public class WebBoxList : SkinnedCommunityControl {
    
        string _skinFileName = "WebBoxes_WebBoxList.ascx";

        DataList dlstWebBoxes;


        //*********************************************************************
        //
        // WebBoxList Constructor
        //
        // Calls the base SkinnedCommunityControl constructor
        // and assigns the default page skin.
        //
        //*********************************************************************

		public WebBoxList() : base() {
            // Assign a default skin file name
            if (SkinFileName == null)
                SkinFileName = _skinFileName;
        }

        
        //*********************************************************************
        //
        // SkinType Property
        //
        // Specifies the skins directory where this page's skin file is located.
        //
        //*********************************************************************
        
        override protected string SkinType {
            get { return "ControlSkins"; }
        }



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

        override protected void InitializeSkin(Control skin) {
            // Find Web Boxes repeater
            dlstWebBoxes = (DataList)GetControl(skin, "dlstWebBoxes");
            dlstWebBoxes.ItemDataBound += new DataListItemEventHandler(Boxes_ItemDataBound);
        } 


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

        override protected void OnLoad(EventArgs e) {
            EnsureChildControls();
            if (objSectionInfo.WebBoxes.Length > 0) {
                dlstWebBoxes.DataSource = CalculateWebBoxes(objSectionInfo.WebBoxes);
                dlstWebBoxes.DataBind();
            }            
        }


        //*********************************************************************
        //
        // Boxes_ItemDataBound Method
        //
        // Assigns values to the controls contained in the item and 
        // alternating item templates of the Repeater used to display
        // the list of Web boxes.
        //
        //*********************************************************************
        
        void Boxes_ItemDataBound(Object s, DataListItemEventArgs e) {
            // Don't do any binding in header or footer
            if (e.Item.ItemType == ListItemType.Item || e.Item.ItemType == ListItemType.AlternatingItem) {
                // Get the box name 
                string boxName = (string)e.Item.DataItem;

                // Find the place holder
                PlaceHolder placeHolder = (PlaceHolder)GetControl(e.Item, "plhWebBox");

                try {
                    // Load the control
                    Control box = Page.LoadControl(WebBoxUtility.GetWebBoxPath(boxName));
                
                    // Add control to PlaceHolder
                    placeHolder.Controls.Add(box);
                } catch (Exception ex) {
                    ActivityUtility.RecordError("Could not find Web Box", ex);
                
                }
            }
        }
        
        
        //*********************************************************************
        //
        // CalculateWebBoxes Method
        //
        // Determines which Web boxes to display based on the 
        // WebBoxDisplayMode property.
        //
        //*********************************************************************

        private ArrayList CalculateWebBoxes(string[] webBoxes) {
            int intItem = 0;
            ArrayList colArrayList = new ArrayList(webBoxes);
            
            // show all
            if (objSectionInfo.WebBoxDisplayMode == 0)
                return colArrayList;

            // Calculate number of boxes to display
            int displayCount = Math.Min(objSectionInfo.WebBoxDisplayMode, colArrayList.Count);

            
            // Get correct number of WebBoxes
            Random objRan = new Random();
            ArrayList colNewArrayList = new ArrayList();
            for (int i=0;i<displayCount;i++) {
                intItem = objRan.Next(colArrayList.Count);    
                colNewArrayList.Add(colArrayList[intItem]);
                colArrayList.RemoveAt(intItem);
            }     
        
            return colNewArrayList;
        }



    }
}