Control to Display Binary Images in ASP.NET

First you need to add reference to the RbmControls.dll, then place the code below in the system.web section in your web.config

 <httpHandlers>
   <add verb="GET" path="__RbmImageHandler.rbm"
   type="RbmControls.RbmImageHandler" />
  </httpHandlers>

Then in the page you want to use the Control Register it by using

<%@ Register Assembly="RbmControls" Namespace="RbmControls" TagPrefix="Rbm" %>

you could either bind the control directly in the ImageContent Property, Also specify whether to display the image as a thumbnail. and specify an image to display when the ImageContent is empty
an alternative is to do that by code

RbmBinaryImage1.ImageContent = FileUpload1.FileBytes;

The RbmBinaryImage Class Inherits from System.Web.UI.WebControls.Image and the functionality of storing and rendering a binary image to it also it adds the ability to generate a thumbnail based on a specified size and caching your image.

The Imagecontent Property Retrieves and store the image bytes in the ViewState also if the DisplayThumbnail property is set to true then it retrieves the thumbnail of the image

public byte[] ImageContent
        {
            get
            {
                byte[] imageBytes = ViewState["ImageContent"] as byte[];
                if (!DisplayThumbnail)
                    return (imageBytes == null) ? null : imageBytes;
                else if (imageBytes != null)
                {
                    byte[] bytes = CreateThumb();
                    return bytes;
                }
                else
                    return null;
            }
            set
            {
                ViewState["ImageContent"] = value;
            }
        }

The OnPreRender Method is used to set the ImageUrl Based on the Property Settings of the Image Control

protected override void OnPreRender(EventArgs e)
        {
            base.OnPreRender(e);
            if (DesignMode)
                return;
            if (ImageContent != null)
            {
                if(string.IsNullOrEmpty(CacheKey))
                    CacheKey = "Rbm" + System.DateTime.Now.Ticks;
                ImageUrl = String.Format("~/__RbmImageHandler.rbm?MimeType={0}&EnableCaching={1}&ImageContent={2}",
                    MimeType, EnableCachinge ? "1" : "0", CacheKey);
                if(this.Context.Cache[CacheKey] == null)
                    this.Context.Cache[CacheKey] = ImageContent;
            }
            else if (ImageUrl == "" || ImageUrl == null)
            {
                ImageUrl = EmptyImageUrl;
            }
        }

In the RbmImageHandler Class in implements the IHttpHandler Interface and override the ProcessRequest method to display the image

public void ProcessRequest(HttpContext context)
        {

            #region Caching Properties
            string cacheKey = context.Request["ImageContent"];
            if (String.IsNullOrEmpty(cacheKey))
                return;
            bool enableCaching = false;
            if (!String.IsNullOrEmpty(context.Request["EnableCaching"]))
                Boolean.TryParse(context.Request["EnableCaching"], out enableCaching);
            #endregion

            #region Image Properties
            string mimeType = context.Request["MimeType"];
            if (string.IsNullOrEmpty(mimeType))
                mimeType = "image/jpeg";
            byte []imageData = context.Cache[cacheKey] as byte[];
            #endregion

            if (!enableCaching)
                context.Cache.Remove(cacheKey);
            context.Response.ContentType = mimeType;
            context.Response.OutputStream.Write(imageData, 0, imageData.Length);
        }