editdownload.cs

一个ASP.NET下的中文内容管理和社区系统

namespace ASPNET.StarterKit.Communities.Downloads {

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


    //*********************************************************************
    //
    // EditDowload Class
    //
    // Represents the Edit Download page. Enables users to edit files.
    //
    //*********************************************************************

    public class EditDownload : ContentEditPage {
    
        string _skinFileName = "Downloads_AddDownload.ascx";
        string _sectionContent = "ASPNET.StarterKit.Communities.Downloads.DownloadsSection";
        
 
 		HtmlInputFile txtDownloadFile;
        TextBox txtDownloadTitle;
        TextBox txtDownloadBriefDescription;
        HtmlTextBox txtDownloadFullDescription;
        TopicPicker dropTopics;
        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; }
        }




 
        //*********************************************************************
        //
        // SkinLoadDownload
        //
        // The skin load event happens after a page skin has been loaded.
        // Here, we grab the necessary controls from the page skin.
        //
        //*********************************************************************
        void SkinLoadDownload(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 Download Title
			txtDownloadTitle = (TextBox)GetControl(e.Skin, "txtDownloadTitle" );
           
            // Find Topics Panel and DropDownList
            dropTopics = (TopicPicker)GetControl(e.Skin, "dropTopics");            
            
			//Find Brief Description
			txtDownloadBriefDescription = (TextBox)GetControl(e.Skin, "txtDownloadBriefDescription" );
            

			//Find Full Description
			txtDownloadFullDescription= (HtmlTextBox)GetControl(e.Skin, "txtDownloadFullDescription" );

            // Find the download upload button
			txtDownloadFile = (HtmlInputFile)GetControl(e.Skin, "txtDownloadFile");
			
			// 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) {
            if (!Page.IsPostBack) {
                 // Get the ContentPageID from QueryString
                 ContentPageID = Int32.Parse(Page.Request.QueryString["id"]);
                 
			     // Get the download info
			     DownloadInfo _downloadInfo = (DownloadInfo)DownloadsUtility.GetDownloadInfo(objUserInfo.Username, ContentPageID);

                 EnsureChildControls();

                 // Assign value to topics
                 dropTopics.SelectedTopicID = _downloadInfo.TopicID;

                 // Assign other form values
                 txtDownloadTitle.Text = _downloadInfo.Title;
                 txtDownloadBriefDescription.Text = _downloadInfo.BriefDescription;
                 txtDownloadFullDescription.Text = _downloadInfo.FullDescription;
            }

        }



        //*********************************************************************
        //
        // SubmitDownload Method
        //
        // This method is raised by clicking the Edit button in the Edit 
        // form. It adds the file to the database.
        //
        //*********************************************************************
    	private void SubmitDownload(Object s, EventArgs e) {
			if (Page.IsValid) {
			        
			    // Get Topic
			    int topicID = -1;
			    if (objSectionInfo.EnableTopics)
			        topicID = Int32.Parse(dropTopics.SelectedItem.Value);    
			    
			    
			    // Get the file data
			    HttpPostedFile theFile = txtDownloadFile.PostedFile;
			    int fileSize = theFile.ContentLength;
			    byte[] fileBytes = new byte[fileSize];
			    System.IO.Stream myStream = theFile.InputStream;
			    myStream.Read(fileBytes,0,fileSize);


			    // Get file name
			    // The filename returns the entire client path. 
			    // Filter for both Windows and Unix file paths.
			    Regex fileNameRE = new Regex("\\\\|/");
			    string[] fileNameSplit = fileNameRE.Split(theFile.FileName);
			    string _fileName = fileNameSplit[fileNameSplit.GetUpperBound(0)];

				// Edit the file
				DownloadsUtility.EditDownload
					(
					objUserInfo.Username,
					objSectionInfo.ID,
					ContentPageID,
					txtDownloadTitle.Text,
					txtDownloadBriefDescription.Text,
					txtDownloadFullDescription.Text,
					topicID,
					_fileName,
					fileBytes
					);

				// Redirect back to Download Page
				Context.Response.Redirect(CommunityGlobals.CalculatePath(String.Format("{0}.aspx", ContentPageID)));    
			}
        }  	
    	
  
        //*********************************************************************
        //
        // EditDownload Constructor
        //
        // Calls the base SkinnedCommunityControl constructor
        // and assigns the default page skin. 
        //
        //*********************************************************************

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





    }
}