缩略图控件代码

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Design;
using System.ComponentModel;
using System.IO;
using System.Text;

#endregion

namespace Bright.WebControls
{
    /// <summary>
    /// Thumbnail Image Viewer Control缩略图Viewer控件
    /// </summary>
    [ToolboxData("<{0}:ThumbViewer runat=\"server\" ImageUrl=\"\" Title=\"\" Width=\"100\" Height=\"100\" />")]
    [ToolboxBitmap(typeof(System.Web.UI.WebControls.Image))]
    public class ThumbViewer : System.Web.UI.WebControls.Image
    {        
        #region Properties & Fields

        #region Urls

        private string _srcImageUrl;

        [        
        Category("Appearance"),
        Description("The URL of the image."),
        DefaultValue(""),        
        Bindable(true)
        ]
        public override string ImageUrl
        {
            get
            {
                return ViewState["ImageUrl"] == null ?
                    string.Empty : ViewState["ImageUrl"].ToString();
            }
            set
            {
                ViewState["ImageUrl"] = value;
            }
        }

        [        
        Category("Appearance"),   
        Description("The URL of the thumb image."),
        DefaultValue(""),
        Bindable(true), 
        Editor("System.Web.UI.Design.ImageUrlEditor, System.Design, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a", typeof(UITypeEditor))
        ]
        public virtual string ThumbUrl