itembookpublisher.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;
    using System.Web.UI;
    using System.Web.UI.WebControls;
    using System.ComponentModel;
	using ASPNET.StarterKit.Communities.Books;



    //*********************************************************************
    //
    // ItemBookPublisher Class
    //
    // Represents a book publisher displayed in a template
    //
    //*********************************************************************

	public class ItemBookPublisher : WebControl {



        //*********************************************************************
        //
        // ItemBookPublisher Constructor
        //
        // Set the default css class
        //
        //*********************************************************************
		public ItemBookPublisher() : base() {
			CssClass = "itemBookPublisher";
			EnableViewState = false;
		}
		

        //*********************************************************************
        //
        // Publisher Property
        //
        // The publisher of the book
        //
        //*********************************************************************
        public string Publisher {
            get {
                if (ViewState["Publisher"] == null)
                    return String.Empty;
                else
                    return (string)ViewState["Publisher"];
                }
            set { ViewState["Publisher"] = value; }
        }		



        //*********************************************************************
        //
        // PublisherLink Property
        //
        // The publisher of the book
        //
        //*********************************************************************
        public string PublisherLink {
            get {
                if (ViewState["PublisherLink"] == null)
                    return String.Empty;
                else
                    return (string)ViewState["PublisherLink"];
                }
            set { ViewState["PublisherLink"] = value; }
        }		

		

        //*********************************************************************
        //
        // OnDataBinding Method
        //
        // Grab the author from the container's DataItem property
        //
        //*********************************************************************
        override protected void OnDataBinding(EventArgs e) {
            ContentItem item;

            if (NamingContainer is ContentItem)
                item = (ContentItem)NamingContainer;
            else
                item = (ContentItem)NamingContainer.NamingContainer;


            BookInfo objBookInfo = (BookInfo)item.DataItem;
            Publisher = objBookInfo.Publisher;
            PublisherLink = objBookInfo.PublisherLink;
        }


		

        //*********************************************************************
        //
        // TagKey Property
        //
        // Only display a link if publisherLink has value
        //
        //*********************************************************************

        override protected HtmlTextWriterTag TagKey {
            get {
                if (PublisherLink == String.Empty)
                    return HtmlTextWriterTag.Span;
                else
                    return HtmlTextWriterTag.A;
            }
        }


        //*********************************************************************
        //
        // AddAttributesToRender Method
        //
        // Add the HRef that links to the publisher
        //
        //*********************************************************************
        protected override void AddAttributesToRender(HtmlTextWriter writer) {
            if (PublisherLink != String.Empty) {
                writer.AddAttribute(HtmlTextWriterAttribute.Href, PublisherLink);
                writer.AddAttribute(HtmlTextWriterAttribute.Target, "_blank");
                base.AddAttributesToRender(writer);
            }
        }        


        //*********************************************************************
        //
        // RenderContents method
        //
        // Display the link label
        //
        //*********************************************************************
        override protected void RenderContents(HtmlTextWriter writer) {
            writer.Write(HttpUtility.HtmlEncode((string)ViewState["Publisher"]));    
        }


    }
}