CommentControl.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Windows.Forms;

namespace CommentControls
{
    [System.ComponentModel.DefaultEvent("ReplyToMe")]
    public partial class CommentControl : UserControl
    {
        private string id; 
        private string poster; 
        private string title; 
        private string text; 
        private DateTime date;
        private int commentLevel;

        private static int nestingIndentation = 15; 

        public event CommentControlEventHandler ReplyToMe;
        public event CommentControlEventHandler DeleteMe;
        public event CommentControlEventHandler EditMe;

        public CommentControl()
        {
            InitializeComponent();
        }

        public CommentControl(string id, string poster, string title, string text, DateTime date, int commentLevel)
        {
            InitializeComponent();

            this.id = id;
            this.poster = poster;
            this.title = title;
            this.text = text;
            this.date = date;
            this.commentLevel = commentLevel;
            lblInfo.Text = title + "by " + poster;
            lblTime.Text = Convert.ToString(date);
            txtComment.Text = text;
            panContainer.Padding = new Padding(commentLevel * nestingIndentation, 0, 0, 0);
        }

        [
            TypeConverter(typeof(CommentControl)),
            Category("Appearance"),
            Description("Wether the user is allowed to reply to this comment")
        ]
        public bool CanReply
        {
            get { return lnkReply.Visible; }
            set { lnkReply.Visible = value; }
        }

        [
            TypeConverter(typeof(CommentControl)),
            Category("Appearance"),
            Description("Wether the user is allowed to edit and delete this comment")
        ]
        public bool CanEdit
        {
            get { return lnkEdit.Visible; }
            set { lnkEdit.Visible = value; lnkDelete.Visible = value; }
        }

        [
            TypeConverter(typeof(CommentControl)),
            Category("Appearance"),
            Description("The ID of the comment")
        ]
        public string ID
        {
            get { return id; }
            set { id = value; }
        }

        [
            TypeConverter(typeof(CommentControl)),
            Category("Appearance"),
            Description("The title of the comment")
        ]
        public string Title
        {
            get { return title; }
            set
            {
                title = value;
                lblInfo.Text = value + " by " + this.poster;
            }
        }

        [
            TypeConverter(typeof(CommentControl)),
            Category("Appearance"),
            Description("Who created the comment")
        ]
        public string Poster
        {
            get { return poster; }
            set
            {
                poster = value;
                lblInfo.Text = this.title + " by " + value;
            }
        }

        [
            TypeConverter(typeof(CommentControl)),
            Category("Appearance"),
            Description("The text of the comment")
        ]
        public string Comment
        {
            get { return text; }
            set {
                text = value;
                txtComment.Text = value;
            }
        }

        [
            TypeConverter(typeof(CommentControl)),
            Category("Appearance"),
            Description("When was the comment created?")
        ]
        public DateTime Date
        {
            get { return date; }
            set
            {
                date = value;
                lblTime.Text = Convert.ToString(value);
            }
        }

        [
            TypeConverter(typeof(CommentControl)),
            Category("Appearance"),
            Description("How deeply is the comment nested?")
        ]
        public int CommentLevel
        {
            get { return commentLevel; }
            set
            {
                commentLevel = value;
                panContainer.Padding = new Padding(value * nestingIndentation, 0, 0, 0);
            }
        }

        private void lnkReply_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            CommentControlEventArgs args = new CommentControlEventArgs(CommentControlEventArgs.CommentControlEventType.Reply);
            if (ReplyToMe != null)
                ReplyToMe(this, args);
        }

        private void lnkDelete_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            CommentControlEventArgs args = new CommentControlEventArgs(CommentControlEventArgs.CommentControlEventType.Delete);
            if (DeleteMe != null)
                DeleteMe(this, args);
        }

        private void lnkEdit_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            CommentControlEventArgs args = new CommentControlEventArgs(CommentControlEventArgs.CommentControlEventType.Edit);
            if (EditMe != null)
                EditMe(this, args);
        }
    }

    public class CommentControlEventArgs : EventArgs
    {
        public enum CommentControlEventType
        {
            Reply,
            Edit,
            Delete
        }

        private CommentControlEventType eventType;

        public CommentControlEventType EventType
        {
            get { return eventType; }
            set { eventType = value; }
        }

        public CommentControlEventArgs(CommentControlEventType et)
        {
            eventType = et;
        }
    }

    public delegate void CommentControlEventHandler(
      object sender, CommentControlEventArgs e);
}

---