editphoto.cs

一个ASP.NET下的中文内容管理和社区系统

namespace ASPNET.StarterKit.Communities.PhotoGallery {

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


    //*********************************************************************
    //
    // EditPhoto Class
    //
    // Represents the Edit Photo page. Enables users to edit existing photos.
    //
    //*********************************************************************

    public class EditPhoto : ContentEditPage {
    
        string _skinFileName = "PhotoGallery_AddPhoto.ascx";
        string _sectionContent = "ASPNET.StarterKit.Communities.PhotoGallery.PhotoGallerySection";
        
 
 		HtmlInputFile txtPhotoFile;
		TextBox txtPhotoTitle;
		TextBox txtPhotoBriefDescription;
        HtmlTextBox txtPhotoFullDescription;
		TopicPicker dropTopics;
        DisplayPhotoImage imgPhoto;
        UploadValidator valUpload;


        //*********************************************************************
        //
        // 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; }
        }







        //*********************************************************************
        //
        // SkinLoadPhoto
        //
        // The skin load event happens after a page skin has been loaded.
        // Here, we grab the necessary controls from the page skin.
        //
        //*********************************************************************
        void SkinLoadPhoto(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 TopicPicker control
            dropTopics = (TopicPicker)GetControl(e.Skin, "dropTopics");
				
			// find the  controls
			txtPhotoFile = (HtmlInputFile) GetControl (e.Skin, "txtPhotoFile");
			txtPhotoTitle = (TextBox) GetControl(e.Skin,"txtPhotoTitle");
			txtPhotoBriefDescription = (TextBox) GetControl (e.Skin, "txtPhotoBriefDescription");
            txtPhotoFullDescription = (HtmlTextBox)GetControl(e.Skin, "txtPhotoFullDescription");
            
            // Find image preview
            imgPhoto = (DisplayPhotoImage)GetControl(e.Skin, "imgPhoto");
            
            			
			// Get the Upload validator (and hide it)
            valUpload = (UploadValidator)GetControl(e.Skin, "valUpload");
            valUpload.Visible = false;
        }
        


		
        //*********************************************************************
        //
        // OnLoad Method
        //
        // Assigns values to the controls from the page skin.
        //
        //*********************************************************************

        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 photo info
			     PhotoInfo _photoInfo = (PhotoInfo)PhotoUtility.GetPhoto(objUserInfo.Username, ContentPageID);

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

                 // Populate the controls
                 EnsureChildControls();
 
                 // assign topic
                 dropTopics.SelectedTopicID = _photoInfo.TopicID;

			     txtPhotoTitle.Text = _photoInfo.Title;
			     txtPhotoBriefDescription.Text = _photoInfo.BriefDescription;
			     txtPhotoFullDescription.Text = _photoInfo.FullDescription;
	
			     imagePath = ImageUtility.BuildImagePath(_photoInfo.ImageID, _photoInfo.ImageName);
                 imgPhoto.ImageUrl = CommunityGlobals.CalculatePath(imagePath);
            }
        }


        //*********************************************************************
        //
        // SubmitPhoto Method
        //
        // This method is raised by clicking the Add button in the Edit 
        // Photo form. It adds the event to the database.
        //
        //*********************************************************************
    	private void SubmitPhoto(Object s, EventArgs e) {
			if (Page.IsValid) {
			    // Get Topic
			    int _topicID = -1;
			    if (objSectionInfo.EnableTopics)
			        _topicID = Int32.Parse(dropTopics.SelectedItem.Value);    
			        
			        
				// Edit the Photo
				    PhotoUtility.EditPhoto
					   (
					   objUserInfo.Username,
					   objSectionInfo.ID,
					   ContentPageID,
					   txtPhotoTitle.Text,
					   txtPhotoBriefDescription.Text,
					   txtPhotoFullDescription.Text,
					   _topicID
					   );
			         
    
                    // Update image
  		            ImageUtility.UpdateSectionImage(ImageID, txtPhotoFile.PostedFile);
 			    
		
				// Redirect back to Book Page
				Context.Response.Redirect(CommunityGlobals.CalculatePath(String.Format("{0}.aspx", ContentPageID)));    
    		}
		}



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

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





    }
}