searchresultsview.cs

本系统是在asp版《在线文件管理器》的基础上设计制作

//------------------------------------------------------------------------------
// <copyright company="Telligent Systems">
//     Copyright (c) Telligent Systems Corporation.  All rights reserved.
// </copyright> 
//------------------------------------------------------------------------------

using System;
using System.Collections;
using System.Text;
using System.Web;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using CommunityServer.Components;
using CommunityServer.Controls;
using CommunityServer.Discussions.Components;

namespace CommunityServer.Discussions.Controls 
{

    // *********************************************************************
    //  SearchView
    //
    /// <summary>
    /// This server control is used to display search options and search results
    /// </summary>
    /// 
    // ********************************************************************/
    public class SearchResultsView : TemplatedWebControl 
    {

        #region Constructor and Member Variables
        CSContext csContext = CSContext.Current;
        string skinFilename = "View-SearchResults.ascx";
        string searchQuery;
        //string[] searchForums;
        //string[] searchUsers;
		Label searchFor;
        TextBox searchTextTop;
        TextBox searchTextBottom;
        Button searchButtonTop;
        Button searchButtonBottom;
        Repeater searchRepeater;
        CurrentPage resultTotal;
        Literal searchDuration;
        Pager pager;
    	HtmlGenericControl validatorTop;
		HtmlGenericControl validatorBottom;
		StatusMessage formStatus;
		Panel searchResultsDisplay;

        // *********************************************************************
        //  SearchView
        //
        /// <summary>
        /// The constructor simply checks for a ForumID value passed in via the
        /// HTTP POST or GET.
        /// properties.
        /// </summary>
        /// 
        // ********************************************************************/
        public SearchResultsView() 
        {

            // Assign a default template name
            this.ExternalSkinFileName = skinFilename;

            //searchForums = ForumsToSearchDecode ( csContext.Context.Request.QueryString["f"] ) ;

        }

		/// <summary>
		/// If not a page back, calls DataBind()
		/// </summary>
		/// <param name="e"></param>
		protected override void OnLoad(EventArgs e) 
		{
			if ( !Page.IsPostBack ) 
			{
				this.DataBind();
			}
			base.OnLoad (e);
		}

        #endregion

        public static string[] ForumsToSearchDecode (string stringToDecode) 
        {
            Hashtable forums = Forums.GetForums(CSContext.Current, false, true);
            UTF8Encoding decoder = new UTF8Encoding();
            string[] filteredForumsToSearch = null;
            ArrayList verifiedForumList = new ArrayList();

            // Convert the parameters from a base64 encoded string and then
            // into a string[]
            //
            if (stringToDecode != string.Empty) 
            {

                // Attempt to decode the string
                try 
                {
                    byte[] forumList = Convert.FromBase64String( stringToDecode );
                    filteredForumsToSearch = decoder.GetString( forumList ).Split(',');
                } 
                catch 
                {
                    filteredForumsToSearch = null;
                }
            }

            // Get a verified list of only the forums the user has access to
            // if our forum string[] is null we get all the forums the user
            // has access to; otherwise the list is checked to ensure we only
            // get forums the user is allowed to see
            //
            if (filteredForumsToSearch == null) 
            {
                foreach (Forum f in forums.Values) 
                {
					if(f.ForumType != ForumType.Deleted && f.ForumType != ForumType.Reporting && f.IsSearchable)
						verifiedForumList.Add(f.SectionID.ToString());
                }
            } 
            else 
            {
                foreach (string forumid in filteredForumsToSearch) 
                {
                    if (forums[ int.Parse(forumid) ] != null) 
                        verifiedForumList.Add(forumid);
                }
            }

            return (string[]) verifiedForumList.ToArray(typeof(string));
        }

        #region Render
        // *********************************************************************
        //  AttachChildControls
        //
        /// <summary>
        /// Initializes the user control loaded in CreateChildControls. Initialization
        /// consists of finding well known control names and wiring up any necessary events.
        /// </summary>
        /// 
        // ********************************************************************/ 
        protected override void AttachChildControls() 
        {

			if (!Page.IsPostBack) {
				searchQuery = csContext.Context.Request.QueryString["q"];
				//searchUsers = CommunityServer.Search.UsersToDecode (csContext.Context.Request.QueryString["u"] );
			}

            // Find all the controls
            //
			searchFor				= (Label) FindControl("ForumDescription");
            searchTextTop           = (TextBox) FindControl("SearchTextTop");
            searchTextBottom        = (TextBox) FindControl("SearchTextBottom");
            searchButtonTop         = FindControl("SearchButtonTop") as Button;
            searchButtonBottom      = FindControl("SearchButtonBottom") as Button;
            searchButtonTop.Text    = ResourceManager.GetString("Search");
            searchButtonBottom.Text = ResourceManager.GetString("Search");
            searchRepeater          = FindControl("SearchRepeater") as Repeater;
            pager                   = (Pager) FindControl("Pager");
            resultTotal             = (CurrentPage) FindControl("TotalResults");
            resultTotal.TextFormat  = ResourceManager.GetString("SearchResults_TotalResults");
            searchDuration          = (Literal) FindControl("SearchDuration");
            searchDuration.Text     = ResourceManager.GetString("SearchResults_SearchDuration");
			formStatus				= FindControl("formStatus") as StatusMessage;
			validatorTop			= (HtmlGenericControl) FindControl("SearchBoxValidatorTop");
			validatorBottom			= (HtmlGenericControl) FindControl("SearchBoxValidatorBottom");
			searchResultsDisplay	= FindControl("SearchResultsDisplay") as Panel;

			((Label) FindControl("ForumName")).Text = ResourceManager.GetString("SearchViewSimple_Title");
			

            // Set up the OnItemCommand for the DataList
            //
            searchRepeater.ItemCommand += new RepeaterCommandEventHandler(Display_Item);
            searchRepeater.ItemDataBound += new RepeaterItemEventHandler( SearchRepeater_ItemDataBound );
            searchButtonTop.Click += new EventHandler(Search_Click);
            searchButtonBottom.Click += new EventHandler(Search_Click);


            // Set the pager size
            //
            pager.PageSize = CSContext.Current.SiteSettings.SearchPostsPerPage;

            // Set the values in our textboxes
            //
            searchTextTop.Text = searchQuery;
            searchTextBottom.Text = searchQuery;
        }
        #endregion

		public void Search_Click (Object sender, EventArgs e) 
		{
			bool isSearchTextInTopTextBox = true;

			// Which search text is being used?
			//
			if ( ((Button) sender).ID != "SearchButtonTop" )
				isSearchTextInTopTextBox = false;

			// Set the text to the correct values
			//
			if (isSearchTextInTopTextBox)
			{
				if(searchTextTop.Text.Trim() == string.Empty)
				{
					validatorTop.Visible = true;
					return;
				}
				else
				{
					validatorTop.Visible = false;
					searchTextBottom.Text = searchTextTop.Text;
				}
			}
			else
			{
				if(searchTextBottom.Text.Trim() == string.Empty)
				{
					validatorBottom.Visible = true;
					return;
				}
				else
				{
					validatorBottom.Visible = false;
					searchTextTop.Text = searchTextBottom.Text;
				}
			}
			
			HttpContext.Current.Response.Redirect(Globals.GetSiteUrls().SearchForText(searchTextTop.Text));
        }

        public override void DataBind() 
        {
			base.DataBind();

            SearchResultSet searchResult = null;
            int resultCountUpper, resultCountLower;

			// Set the "search for" text
			//
			searchFor.Text = string.Format(ResourceManager.GetString("SearchViewSimple_SearchFor"), Globals.HtmlEncode(searchTextTop.Text));

            // Get the search results
            // 

            SearchQuery query = new SearchQuery();
            query.PageIndex = pager.PageIndex;
            query.PageSize = pager.PageSize;
            query.UserID = CSContext.Current.User.UserID;
            query.SectionsToSearch = ForumsToSearchDecode ( csContext.Context.Request.QueryString["f"] );
            query.UsersToSearch = CommunityServer.Search.UsersToDecode (csContext.Context.Request.QueryString["u"]);
            query.SearchTerms = searchTextTop.Text;
            ForumSearch search = new ForumSearch();

			try {
				searchResult = search.GetSearchResults(query);
			} catch {
				searchResultsDisplay.Visible = false;
				formStatus.Visible = true;
				formStatus.Success = false;
				formStatus.ResourceName = "SearchView_NoResults";

				return;
			}

            // Set the TotalRecords in the pager
            //    
            pager.TotalRecords = searchResult.TotalRecords;

            // Databind
            //
            searchRepeater.DataSource = searchResult.Posts;
            searchRepeater.DataBind();

            resultCountLower = 1 + (pager.PageIndex * pager.PageSize);

            // Set the upper bounds of the search results text
            //
            if (pager.TotalRecords > pager.PageSize) 
                resultCountUpper = pager.PageSize + (pager.PageSize * pager.PageIndex);
            else
                resultCountUpper = searchResult.TotalRecords;

			// Setup the result total
			resultTotal.PageIndex = pager.PageIndex;
			resultTotal.TotalPages = pager.CalculateTotalPages();
			resultTotal.TotalRecords = pager.TotalRecords;

			if (searchResult.SearchDuration < 1)
				searchDuration.Text = string.Format(searchDuration.Text, "< 1");
			else
				searchDuration.Text = string.Format(searchDuration.Text, searchResult.SearchDuration);

        }

        public void Display_Item (Object sender, RepeaterCommandEventArgs e) 
        {

            HttpContext.Current.Response.Write( e.CommandArgument );
            DataBind();

        }
		
        /// <summary>
        /// Added to handle Username displaying
        /// </summary>
        protected void SearchRepeater_ItemDataBound (Object Sender, RepeaterItemEventArgs e) {
            ForumPost post = e.Item.DataItem as ForumPost;
            if (post == null)
                return;
            
            bool isAnonymousPostingEnabled = post.IsAnonymousPost && 
                CSContext.Current.SiteSettings.EnableUserPostingAsAnonymous &&
                post.Forum.EnableAnonymousPostingForUsers;

            switch (e.Item.ItemType) {
                case  ListItemType.Item:
                case  ListItemType.AlternatingItem:
                    Label userName = e.Item.FindControl( "UsernameLink" ) as Label;
                    if (userName != null) {
                        userName.Text = Formatter.FormatUsername( post.User.UserID, post.User.Username, isAnonymousPostingEnabled, false ); 
                    }
                    break;
            }
        }
    }
}