inventory.cs

微软的行业应用解决方案示例

using System;
using System.IO;

namespace HardwareDistributor.Business
{
    public class Inventory : DataObject
    {
        #region Constants
        public const string BIN_COLUMN = "Bin";
        public const string DISTRIBUTIONCENTER_COLUMN = "DistributionCenter";
        public const string INSTOCK_COLUMN = "InStock";
        public const string INVENTORYID_COLUMN = "InventoryId";
        public const string NAME_COLUMN = "Name";
        public const string PICTURE_COLUMN = "Picture";
        public const string PRICE_COLUMN = "Price";
        #endregion


        #region Fields
        private Nullable<int> _bin = null;
        private Nullable<int> _distributionCenter = null;
        private Nullable<int> _inStock = null;
        private Nullable<int> _inventoryId = null;
        private string _name = string.Empty;
        private byte[] _picture = null;
        private Nullable<decimal> _price = null;
        #endregion


        #region Constructor(s) & Dispose
        /// <summary>
        /// Create a new Inventory item
        /// </summary>
        public Inventory() : base()
        {
        }


        /// <summary>
        /// Create an unmodified Inventory item
        /// </summary>
        /// <param name="inventoryId">Id of the inventory item</param>
        /// <param name="inventoryName">Name of the inventory item</param>
        /// <param name="picture">Picture of the inventory item</param>
        /// <param name="price">Price of the inventory item</param>
        /// <param name="inStock">
        /// Quantity of the inventory item in stock
        /// </param>
        /// <param name="distributionCenter">
        /// Distribution center where the inventory item is stored
        /// </param>
        /// <param name="bin">bin where the inventory item is stored</param>
        public Inventory(Nullable<int> inventoryId, 
                         string inventoryName, 
                         byte[] picture, 
                         Nullable<decimal> price, 
                         Nullable<int> inStock, 
                         Nullable<int> distributionCenter, 
                         Nullable<int> bin) : base()
        {
            _bin = bin;
            _distributionCenter = distributionCenter;
            _inStock = inStock;
            _inventoryId = inventoryId;
            _name = inventoryName;
            _picture = picture;
            _price = price;
            _objectState= ObjectState.Unchanged;
        }
        #endregion


        #region Properties
        /// <summary>
        /// Id of warehouse bin where Inventory items are found
        /// </summary>
        public Nullable<int> Bin
        {
            get
            {
                return _bin;
            }
            set
            {
                // If needed put additional editing before the change value.
                _bin = ChangeValue<Nullable<int>>(_bin, value, BIN_COLUMN);
            }
        }
        /// <summary>
        /// Id of Distribution Center
        /// </summary>
        public Nullable<int> DistributionCenter
        {
            get
            {
                return _distributionCenter;
            }
            set
            {
                // If needed put additional editing before the change value.
                _distributionCenter = ChangeValue<Nullable<int>>(_distributionCenter, 
                                                                 value, 
                                                                 DISTRIBUTIONCENTER_COLUMN);
            }
        }


        /// <summary>
        /// Number of Inventory Items in stock
        /// </summary>
        public Nullable<int> InStock
        {
            get
            {
                return _inStock;
            }
            set
            {
                // If needed put additional editing before the change value.
                _inStock = ChangeValue<Nullable<int>>(_inStock, value, 
                                                      INSTOCK_COLUMN);
            }
        }

        /// <summary>
        /// Unique Inventory Id
        /// </summary>
        public Nullable<int> InventoryId
        {
            get
            {
                return _inventoryId;
            }
            set
            {
                _inventoryId = ChangeKey<Nullable<int>>(_inventoryId, value,
                                                               INVENTORYID_COLUMN);
            }
        }

        /// <summary>
        /// Name of the Inventory Item
        /// </summary>
        public string InventoryName
        {
            get
            {
                return _name;
            }
            set
            {
                // If needed put additional editing before the change value.
                _name = ChangeValue<string>(_name, value, NAME_COLUMN);
            }
        }


        /// <summary>
        /// Byte Array to hold the Inventory image
        /// </summary>
        public byte[] Picture
        {
            get
            {
                return _picture;
            }
            set
            {
                // If needed put additional editing before the change value.
                _picture = ChangeValue<byte[]>(_picture, value, PICTURE_COLUMN);
            }
        }

        /// <summary>
        /// Returns the Picture byte array as a MemoryStream that can be 
        /// displayed in a PictureBox
        /// </summary>
        public MemoryStream PictureAsStream
        {
            get
            {
                MemoryStream _ms = new MemoryStream(Picture);
                return _ms;
            }
        }

        /// <summary>
        /// Price of the Inventory item
        /// </summary>
        public Nullable<decimal> Price
        {
            get
            {
                return _price;
            }
            set
            {
                // If needed put additional editing before the change value.
                _price = ChangeValue<Nullable<decimal>>(_price, value, PRICE_COLUMN);
            }
        }
        #endregion

    }
}