editbook.cs

一个ASP.NET下的中文内容管理和社区系统

namespace ASPNET.StarterKit.Communities.Books {

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


    //*********************************************************************
    //
    // EditBook Class
    //
    // Represents the Edit Book page. Enables users to edit books.
    //
    //*********************************************************************

    public class EditBook : ContentEditPage {
    
        string _skinFileName = "Books_AddBook.ascx";
        string _sectionContent = "ASPNET.StarterKit.Communities.Books.BookSection";
 

		TextBox txtBookTitle;
        TopicPicker dropTopics;
		TextBox txtBookAuthor;
		TextBox txtBookISBN;
		TextBox txtBookPrice;
		TextBox txtBookPurchaseLink;
		TextBox txtBookBriefDescription;
		HtmlTextBox txtBookFullDescription;
		HtmlInputFile txtImageFile;
		DisplayBookImage imgBookImage;
		TextBox txtBookPublicationDate;
		TextBox txtBookPublisher;
		TextBox txtBookPublisherLink;




        //*********************************************************************
        //
        // ContentPageID Property
        //
        // Stores the ID of the content being edited in View State
        //
        //*********************************************************************

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



        //*********************************************************************
        //
        // ImageID Property
        //
        // Represents the Image ID of the book being edited.
        //
        //*********************************************************************

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



        //*********************************************************************
        //
        // SkinLoadBook
        //
        // The skin load event happens after a page skin has been loaded.
        // Here, we grab the necessary controls from the page skin.
        //
        //*********************************************************************
        void SkinLoadBook(Object s, SkinLoadEventArgs e) {
  
   			// Find the Form so that we can change the EncType of the post.
			HtmlForm form = (HtmlForm)Page.FindControl("PageForm");
			form.Enctype="multipart/form-data";

			// Find Book Title
			txtBookTitle = (TextBox)GetControl(e.Skin, "txtBookTitle" );
 
            // Find Topic Picker
            dropTopics = (TopicPicker)GetControl(e.Skin, "dropTopics");
            
			// Find Author
			txtBookAuthor = (TextBox)GetControl(e.Skin, "txtBookAuthor" );

			// Find ISBN
			txtBookISBN = (TextBox)GetControl(e.Skin, "txtBookISBN" );
            
			// Find Price
			txtBookPrice = (TextBox)GetControl(e.Skin, "txtBookPrice" );

			// Find Purchase Link
			txtBookPurchaseLink = (TextBox)GetControl(e.Skin, "txtBookPurchaseLink" );
            
			//Find Brief Description
			txtBookBriefDescription = (TextBox)GetControl(e.Skin, "txtBookBriefDescription" );
 
			// Find Full Description
			txtBookFullDescription= (HtmlTextBox)GetControl(e.Skin, "txtBookFullDescription" );

            // Find the image upload button
			txtImageFile = (HtmlInputFile)GetControl(e.Skin, "txtImageFile");

			// Find the Book image 
			imgBookImage = (DisplayBookImage)GetControl(e.Skin, "imgBookImage");
			
			// Find the Publication Date
			txtBookPublicationDate = (TextBox)GetControl(e.Skin, "txtBookPublicationDate");
			
			// Find the Publisher
			txtBookPublisher = (TextBox)GetControl(e.Skin, "txtBookPublisher");
			
			// Find the Publisher Link
			txtBookPublisherLink = (TextBox)GetControl(e.Skin, "txtBookPublisherLink");
        }
        



        //*********************************************************************
        //
        // OnLoad Method
        //
        // Assign previous content values to edit form.
        //
        //*********************************************************************

        override protected void OnLoad(EventArgs e) {
            string imagePath;
            
            if (!Page.IsPostBack) {
                 // Get the ContentPageID from QueryString
                 ContentPageID = Int32.Parse(Page.Request.QueryString["id"]);
                 
			     // Get the book info
			     BookInfo _bookInfo = (BookInfo)BookUtility.GetBookInfo(objUserInfo.Username, ContentPageID);

                 // Store the original Image ID
                 ImageID = _bookInfo.ImageID;

                 // Populate the controls
                 EnsureChildControls();
 
                 // Assign value to topics
                 dropTopics.SelectedTopicID = _bookInfo.TopicID;
                 
			     txtBookTitle.Text = _bookInfo.Title;
			     txtBookAuthor.Text = _bookInfo.BookAuthor;
			     txtBookISBN.Text = _bookInfo.ISBN;
                 txtBookPurchaseLink.Text = _bookInfo.PurchaseLink;
                 txtBookPrice.Text = _bookInfo.Price.ToString("n2");
			     txtBookBriefDescription.Text = _bookInfo.BriefDescription;
			     txtBookFullDescription.Text = _bookInfo.FullDescription;
                 txtBookPublicationDate.Text = _bookInfo.PublicationDate.ToString("d");
                 txtBookPublisher.Text = _bookInfo.Publisher;
                 txtBookPublisherLink.Text = _bookInfo.PublisherLink;
			     if (_bookInfo.ImageID != -1) {
			        imgBookImage.Visible = true;
			        imagePath = ImageUtility.BuildImagePath(_bookInfo.ImageID, _bookInfo.ImageName);
                    imgBookImage.ImageUrl = CommunityGlobals.CalculatePath(imagePath);
			     }
			     else
			        imgBookImage.Visible = false;
            }
        }




        //*********************************************************************
        //
        // SubmitBook Method
        //
        // This method is raised by clicking the Edit button in the Edit 
        // form.
        //
        //*********************************************************************

		private void SubmitBook(Object s, EventArgs e) {
			if (Page.IsValid) {
				// Get Topic
			    int topicID = -1;
			    if (objSectionInfo.EnableTopics)
			        topicID = Int32.Parse(dropTopics.SelectedItem.Value);    

				
				// Edit the book
				BookUtility.EditBook
					(
					objUserInfo.Username,
					objSectionInfo.ID,
					ContentPageID,
					txtBookTitle.Text,
					txtBookBriefDescription.Text,
					txtBookFullDescription.Text,
					txtBookAuthor.Text,
					txtBookISBN.Text,
					txtBookPurchaseLink.Text,
					Decimal.Parse(txtBookPrice.Text),
					DateTime.Parse(txtBookPublicationDate.Text),
					txtBookPublisher.Text,
					txtBookPublisherLink.Text,
					topicID
					);

                // Update Image
                if (ImageID == -1)
                    ImageUtility.AddSectionImage(ContentPageID, txtImageFile.PostedFile);
                else
    		        ImageUtility.UpdateSectionImage(ImageID, txtImageFile.PostedFile);
                    
				
				// Redirect back to Book Page
				Context.Response.Redirect(CommunityGlobals.CalculatePath(String.Format("{0}.aspx", ContentPageID)));    
			}
		}
    

        //*********************************************************************
        //
        // EditBook Constructor
        //
        // Calls the base SkinnedCommunityControl constructor
        // and assigns the default page skin. Also checks whether
        // current user has permissions to edit.
        //
        //*********************************************************************

        public EditBook() : base() {
            // Assign a default skin file name
            SkinFileName = _skinFileName;
            
            // Specify Section Content
            SectionContent = _sectionContent;
            
            // Wire-up event handlers
            this.SkinLoad += new SkinLoadEventHandler(SkinLoadBook);
            this.Submit += new SubmitEventHandler(SubmitBook);
        }





    }
}