Error: Could not load type 'upload.aspx'.

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.NET3.0

.NET

Hi,

I am trying to create a web page to upload an image. I will copy the code below

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using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;

namespace netimageupload
{
	/// <summary>
	/// Summary description for WebForm1.
	/// </summary>
	public class WebForm1 : System.Web.UI.Page
	{
		protected System.Web.UI.HtmlControls.HtmlInputFile filUpload;
		protected System.Web.UI.WebControls.Image imgPicture;
		protected System.Web.UI.WebControls.Label lblOutput;
		protected System.Web.UI.WebControls.Button btnUpload;
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			// Put user code to initialize the page here
		}

		#region Web Form Designer generated code
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: This call is required by the ASP.NET Web Form Designer.
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// Required method for Designer support - do not modify
		/// the contents of this method with the code editor.
		/// </summary>
		private void InitializeComponent()
		{    
			this.btnUpload.Click += new System.EventHandler(this.btnUpload_Click);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void btnUpload_Click(object sender, System.EventArgs e)
		{
			// Initialize variables
			string sSavePath;
			string sThumbExtension;
			int intThumbWidth;
			int intThumbHeight;

			// Set constant values
			sSavePath = "images/";
			sThumbExtension = "_thumb";
			intThumbWidth = 160;
			intThumbHeight = 120;

			// If file field isn’t empty
			if (filUpload.PostedFile != null)
			{
				// Check file size (mustn’t be 0)
				HttpPostedFile myFile = filUpload.PostedFile;
				int nFileLen = myFile.ContentLength;
				if (nFileLen == 0)
				{
					lblOutput.Text = "There wasn't any file uploaded.";
					return;
				}

				// Check file extension (must be JPG)
				if (System.IO.Path.GetExtension(myFile.FileName).ToLower() != ".jpg")
				{
					lblOutput.Text = "The file must have an extension of JPG";
					return;
				}

				// Read file into a data stream
				byte[] myData = new Byte[nFileLen];
				myFile.InputStream.Read(myData,0,nFileLen);

				// Make sure a duplicate file doesn’t exist.  If it does, keep on appending an incremental numeric until it is unique
				string sFilename = System.IO.Path.GetFileName(myFile.FileName);
				int file_append = 0;
				while (System.IO.File.Exists(Server.MapPath(sSavePath + sFilename)))
				{
					file_append++;
					sFilename = System.IO.Path.GetFileNameWithoutExtension(myFile.FileName) + file_append.ToString() + ".jpg";
				}

				// Save the stream to disk
				System.IO.FileStream newFile = new System.IO.FileStream(Server.MapPath(sSavePath + sFilename), System.IO.FileMode.Create);
				newFile.Write(myData,0, myData.Length);
				newFile.Close();

				// Check whether the file is really a JPEG by opening it
				System.Drawing.Image.GetThumbnailImageAbort myCallBack = new System.Drawing.Image.GetThumbnailImageAbort(ThumbnailCallback);
				Bitmap myBitmap;
				try
				{
					myBitmap = new Bitmap(Server.MapPath(sSavePath + sFilename));

					// If jpg file is a jpeg, create a thumbnail filename that is unique.
					file_append = 0;
					string sThumbFile = System.IO.Path.GetFileNameWithoutExtension(myFile.FileName) + sThumbExtension + ".jpg";
					while (System.IO.File.Exists(Server.MapPath(sSavePath + sThumbFile)))
					{
						file_append++;
						sThumbFile = System.IO.Path.GetFileNameWithoutExtension(myFile.FileName) + file_append.ToString() + sThumbExtension + ".jpg";
					}

					// Save thumbnail and output it onto the webpage
					System.Drawing.Image myThumbnail = myBitmap.GetThumbnailImage(intThumbWidth, intThumbHeight, myCallBack, IntPtr.Zero);
					myThumbnail.Save (Server.MapPath(sSavePath + sThumbFile));
					imgPicture.ImageUrl = sSavePath + sThumbFile;

					// Displaying success information
					lblOutput.Text = "File uploaded successfully!";

					// Destroy objects
					myThumbnail.Dispose();
					myBitmap.Dispose();
				}
				catch (ArgumentException errArgument)
				{
					// The file wasn't a valid jpg file
					lblOutput.Text = "The file wasn't a valid jpg file.";
					System.IO.File.Delete(Server.MapPath(sSavePath + sFilename));
				}
			}
		}

		public bool ThumbnailCallback()
		{
			return false;
		}
	}
}

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While building the web site i am getting an error messae "Could not load type upload.aspx>
I got this code from Code Project.

Please help.....

[edit]Code block added - OriginalGriff[/edit]