In c# ASP.Net is simple ... you need to know the virtual path of that image ... bellow is a method that i used to save my barcode images that i ganerate into a web browser
public void GetPhoto(string filePath)
{
WebClient fileReader = new WebClient();
fileReader.DownloadFile(filePath, Server.MapPath(string.Format("Image/someImage_{0}.jpg",txtBarCodeText.Text)));
byte[] photo = null;
string stream = Server.MapPath(string.Format("Image/someImage_{0}.jpg",txtBarCodeText.Text));
TextBox1.Text = stream.ToString();
}
filePath need to look like this... http://www.website.com/image.jpg
you can right click on web picture you want to get and look to properties to see it's path
Gook luck ;)