Silverlight Database Deep Zoom

// 
// This source code is licensed for commercial and non-commercial use under the 
// Code Project Open License (CPOL) 1.02  http://www.codeproject.com/info/cpol10.aspx
// Developer: Joerg Lang (lang.joerg@gmail.com)
//  
using System;
using System.Collections.Generic;
using System.Data;
using System.Drawing;

namespace DbDzComposer
{
    /// <summary>
    /// This abstract class defines the interfaces a concrete class must define to save to a database
    /// </summary>
    public abstract class IDzDbPersistance
    {
        /// <summary>
        /// Gets or sets the db connection.
        /// </summary>
        /// <value>The db connection.</value>
        public abstract IDbConnection DbConnection { get; set; }

        /// <summary>
        /// Saves some basic information about the image.
        /// </summary>
        /// <param name="imageName">Name of the image.</param>
        /// <param name="width">The widht.</param>
        /// <param name="height">The height.</param>
        /// <param name="tileSize">Size of the tile.</param>
        /// <param name="overlap">The overlap.</param>
        /// <param name="mimeType">The mime type of the tiles</param>
        /// <param name="thumbnail">A Thumbnail preview</param>
        /// <returns></returns>
        public abstract int SaveImageInfo(string imageName, int width, int height, int tileSize, int overlap,
                                          string mimeType, Bitmap thumbnail);

        /// <summary>
        /// Gets a list with the information about the images.
        /// </summary>
        /// <param name="fromUri">The Uri from which the call is made.</param>
        /// <returns></returns>
        public abstract List<ImageInfo> GetImageInfo(Uri fromUri);

        /// <summary>
        /// Saves one image tile to a image that was created before using the SaveImageInfo method.
        /// </summary>
        /// <param name="imageId">The image id.</param>
        /// <param name="level">The level.</param>
        /// <param name="x">The x.</param>
        /// <param name="y">The y.</param>
        /// <param name="bitmap">The bitmap.</param>
        public abstract void SaveImageTile(int imageId, int level, int x, int y, Bitmap bitmap);

        /// <summary>
        /// Gets the image tile requested by the level, and the x and y coordinates for a specific image.
        /// </summary>
        /// <param name="imageId">The image id.</param>
        /// <param name="level">The level.</param>
        /// <param name="x">The x.</param>
        /// <param name="y">The y.</param>
        /// <returns></returns>
        public abstract Bitmap GetImageTile(int imageId, int level, int x, int y);

        /// <summary>
        /// Gets the thumbnail for a specifig image
        /// </summary>
        /// <param name="imageId">The image id.</param>
        /// <returns></returns>
        public abstract Bitmap GetThumbnail(int imageId);
    }

    /// <summary>
    /// A simple class that allows us to return the information about an image 
    /// </summary>
    public class ImageInfo
    {
        public int ImageId { get; set; }
        public string ImageName { get; set; }
        public int Width { get; set; }
        public int Height { get; set; }
        public int TileSize { get; set; }
        public int Overlap { get; set; }
        public string MimeType { get; set; }
        public string ThumbnailUrl { get; set; }
    }
}