postlist.cs

微软的.NET论坛的源代码（COOL!!!）

using System;
using System.Data;
using System.Data.SqlClient;
using System.Collections;
using System.Collections.Specialized;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using AspNetForums;
using AspNetForums.Controls.Moderation;
using AspNetForums.Components;
using System.ComponentModel;

namespace AspNetForums.Controls {

    /// <summary>
    /// This Web control displays a thread in a flat display.  The developer must pass in
    /// either a PostID.  If a PostID is passed in, the thread that that Post belongs
    /// to is constructed.
    /// </summary>
    [
        ParseChildren(true)
    ]
    public class PostList : DataList {

        User user;
        String siteStyle;

        // *********************************************************************
        //  CreateChildControls
        //
        /// <summary>
        /// This event handler adds the children controls and is resonsible
        /// for determining the template type used for the control.
        /// </summary>
        /// 
        // ********************************************************************/ 
        protected override void CreateChildControls() {

            // Do we have a user?
            if (HttpContext.Current.Request.IsAuthenticated) {
                user = Users.GetUserInfo(HttpContext.Current.User.Identity.Name, true);
            }

            // Set the siteStyle for the page
            if (user != null)
                siteStyle = user.SiteStyle;
            else
                siteStyle = Globals.SiteStyle;

            // Apply Template
            ApplyTemplates();

            // Viewstate is disabled
            EnableViewState = false;

        }

        // *********************************************************************
        //  HandleDataBindingForPostCell
        //
        /// <summary>
        /// Databinds the post cell
        /// </summary>
        /// <remarks>
        /// Used only if a user defined template is not provided.
        /// </remarks>
        /// 
        // ********************************************************************/
        private void HandleDataBindingForPostCell(Object sender, EventArgs e) {
            Table table;
            TableRow tr;
            TableCell td;
            Label label;
            string dateFormat; 
            DateTime postDateTime;
            User postUser;

            // Get the sender
            TableCell postInfo = (TableCell) sender;
            DataListItem container = (DataListItem) postInfo.NamingContainer;
            Post post = (Post) container.DataItem;

            // Get the user that created the post
            postUser = Users.GetUserInfo(post.Username, false);

            // Create the table
            table = new Table();
            table.CellPadding = 3;
            table.CellSpacing = 0;
            table.Width = Unit.Percentage(100);
            
            // Row 1
            tr = new TableRow();
            td = new TableCell();
            td.CssClass = "forumRowHighlight";

            // Add in Subject
            label = new Label();
            label.CssClass = "normalTextSmallBold";
            label.Text = post.Subject + "<a name=\"" + post.PostID + "\"/>";
            td.Controls.Add(label);

            td.Controls.Add(new LiteralControl("<br>"));

            // Add in 'Posted: '
            label = new Label();
            label.CssClass = "normalTextSmaller";
            label.Text = " Posted: ";
            td.Controls.Add(label);

            // Get the postDateTime
            postDateTime = post.PostDate;

            // Personalize
            if (user != null) {
                dateFormat = user.DateFormat;
                postDateTime = Users.AdjustForTimezone(postDateTime, user);
            } else {
                dateFormat = Globals.DateFormat;
            }

            // Add in PostDateTime
            label = new Label();
            label.CssClass = "normalTextSmaller";
            label.Text = postDateTime.ToString(dateFormat + " " + Globals.TimeFormat);
            td.Controls.Add(label);

            // Add row 1
            tr.Controls.Add(td);
            table.Controls.Add(tr);

            // Row 2 (body)
            tr = new TableRow();
            td = new TableCell();

            // Add Body
            label = new Label();
            label.CssClass = "normalTextSmall";
            label.Text = Globals.FormatPostBody(post.Body);
            td.Controls.Add(label);

            // Add row 2
            tr.Controls.Add(td);
            table.Controls.Add(tr);

            // Row 3 (Signature)
            tr = new TableRow();
            td = new TableCell();
            label = new Label();
            label.CssClass = "normalTextSmaller";

            if (postUser.Signature != "") {
                label.Text = Globals.FormatSignature(postUser.Signature);
            }
            td.Controls.Add(label);
            tr.Controls.Add(td);
            table.Controls.Add(tr);

            // Add whitespace
            tr = new TableRow();
            td = new TableCell();
            td.Height = 2;
            tr.Controls.Add(td);
            table.Controls.Add(tr);

            // Add buttons for user options
            tr = new TableRow();
            td = new TableCell();
            
            // Add the reply button
            if (!post.IsLocked) {
                // Reply button
                HyperLink replyButton = new HyperLink();
                replyButton.Text = "<img border=0 src=" + Globals.ApplicationVRoot + "/skins/" + Globals.Skin + "/images/newpost.gif" + ">";
                replyButton.NavigateUrl = Globals.UrlReplyToPost + post.PostID + "&mode=flat";
                td.Controls.Add(replyButton);
            }

            if ((user != null) && (user.Username.ToLower() == post.Username.ToLower()) && (user.IsTrusted)) {
                // Edit button
                HyperLink editButton = new HyperLink();
                editButton.Text = "<img border=0 src=" + Globals.ApplicationVRoot + "/skins/" + Globals.Skin + "/images/editpost.gif" + ">";
                editButton.NavigateUrl = Globals.UrlUserEditPost + post.PostID;
                td.Controls.Add(editButton);
            }

            // Anything to add to the table control?
            if (td.Controls.Count > 0) {
                tr.Controls.Add(td);
                table.Controls.Add(tr);
            }

            // Is the current user a moderator?
            if ((user != null) && (user.IsModerator)) {
                tr = new TableRow();
                td = new TableCell();

                // Find the moderation menu
                ModerationMenu moderationMenu = new ModerationMenu();
                moderationMenu.PostID = post.PostID;
                moderationMenu.ThreadID = post.ThreadID;
                moderationMenu.UsernamePostedBy = post.Username;
                moderationMenu.SkinFilename = "Moderation/Skin-ModeratePost.ascx";

                td.Controls.Add(moderationMenu);
                tr.Controls.Add(td);
                table.Controls.Add(tr);

            }

            postInfo.Controls.Add(table);
        }

        // *********************************************************************
        //  HandleDataBindingForAuthorCell
        //
        /// <summary>
        /// Databinds the name of the author.
        /// </summary>
        /// <remarks>
        /// Used only if a user defined template is not provided.
        /// </remarks>
        /// 
        // ********************************************************************/
        private void HandleDataBindingForAuthorCell(Object sender, EventArgs e) {	

            TableCell userInfo = (TableCell) sender;
            DataListItem container = (DataListItem) userInfo.NamingContainer;
            Post post = (Post) container.DataItem;
            User user;
            HyperLink link;
            Label label;
            Image image;
            Uri url;

            // Get the user object - note, we are using
            // the cache under the covers, so this doesn't
            // result in a db lookup for each request
            user = Users.GetUserInfo(post.Username, false);

            // Build user info table
            Table table = new Table();
            TableRow tr;
            TableCell td;

            // Author
            tr = new TableRow();
            td = new TableCell();
            label = new Label();
            label.CssClass = "normalTextSmallBold";
            label.Text = user.Username;
            td.Controls.Add(label);
            tr.Controls.Add(td);
            table.Controls.Add(tr);

            // About
            tr = new TableRow();
            td = new TableCell();
            link = new HyperLink();
            link.CssClass = "normalTextSmaller";
            link.NavigateUrl = Globals.UrlUserProfile + user.Username;
            link.Text = "Profile";
            td.Controls.Add(link);

            // whitespace
            td.Controls.Add(new LiteralControl("<br>"));

            // Web Site
            if (user.Url != "") {
                url = new Uri(user.Url);
                link = new HyperLink();
                link.CssClass = "normalTextSmaller";
                link.NavigateUrl = user.Url;
                link.Text = url.Host;
                link.Target = "_new";
                td.Controls.Add(link);
            }
            tr.Controls.Add(td);
            table.Controls.Add(tr);

            // Do we have any Icon for the user?
            if ((user.HasIcon) && (user.ShowIcon)) {
                tr = new TableRow();
                td = new TableCell();
                image = new Image();
                image.Width = 80;
                image.Height = 80;
                image.ImageUrl = user.ImageUrl;
                td.Controls.Add(image);
                tr.Controls.Add(td);
                table.Controls.Add(tr);
            }

            // Top 25 user?
            if (Users.IsTop25User(user.Username)) {
                tr = new TableRow();
                td = new TableCell();
                image = new Image();
                image.ImageUrl = Globals.ApplicationVRoot + "/skins/" + siteStyle + "/images/users_top25.gif";
                image.AlternateText = "Top 25 Poster";
                td.Controls.Add(image);
                tr.Controls.Add(td);
                table.Controls.Add(tr);

            // Top 50 user?
            } else if (Users.IsTop50User(user.Username)) {
                tr = new TableRow();
                td = new TableCell();
                image = new Image();
                image.ImageUrl = Globals.ApplicationVRoot + "/skins/" + siteStyle + "/images/users_top50.gif";
                image.AlternateText = "Top 50 Poster";
                td.Controls.Add(image);
                tr.Controls.Add(td);
                table.Controls.Add(tr);

            } else if (Users.IsTop100User(user.Username)) {
                tr = new TableRow();
                td = new TableCell();
                image = new Image();
                image.ImageUrl = Globals.ApplicationVRoot + "/skins/" + siteStyle + "/images/users_top100.gif";
                image.AlternateText = "Top 100 Poster";
                td.Controls.Add(image);
                tr.Controls.Add(td);
                table.Controls.Add(tr);