The appropriate headers needs to be set.
try
{
string html;
using (WebClient client = new WebClient())
{
client.Headers.Add("Accept-Language", " en-US");
client.Headers.Add("Accept", " text/html, application/xhtml+xml, */*");
client.Headers.Add("User-Agent", "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)");
html = client.DownloadString("http://www.coleparmer.co.uk/Product/Turb_Std_Hach_2100q_Kit/WZ-99900-47");
}
}
catch (WebException ex)
{
if (ex.Status == WebExceptionStatus.ProtocolError && ex.Response != null)
{
var resp = (HttpWebResponse)ex.Response;
if (resp.StatusCode == HttpStatusCode.NotFound) // HTTP 404
{
//Handle it
}
}
//Handle it
}
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…