웹에서 이미지 파일 다운로드 하는 방법

출처 : http://www.codeproject.com/KB/tips/cs_imagedownload.aspx

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Net;
using System.Text;

public class DownloadImage {
  private string imageUrl;
  private Bitmap bitmap;
  public DownloadImage(string imageUrl) {
    this.imageUrl = imageUrl;
  }
  public void Download() {
    try {
      WebClient client = new WebClient();
      Stream stream = client.OpenRead(imageUrl);
      bitmap = new Bitmap(stream);
    }
    catch (Exception e) {
      Console.WriteLine(e.Message);
    }
  }
  public Bitmap GetImage() {
    return bitmap;
  }
  public void SaveImage(string filename, ImageFormat format) {
    if (bitmap != null) {
      bitmap.Save(filename, format);
    }
  }
}