I am trying to use WebClient to download a file from web using a WinForms application. However, I really only want to download HTML file. Any other type I will want to ignore.
I checked the WebResponse.ContentType, but its value is always null.
Anyone have any idea what could be the cause?
I'm not sure the cause, but perhaps you hadn't downloaded anything yet. This is the lazy way to get the content type of a remote file/page (I haven't checked if this is efficient on the wire. For all I know, it may download huge chunks of content)
Stream connection = new MemoryStream(""); // Just a placeholder
WebClient wc = new WebClient();
string contentType;
try
{
connection = wc.OpenRead(current.Url);
contentType = wc.ResponseHeaders["content-type"];
}
catch (Exception)
{
// 404 or what have you
}
finally
{
connection.Close();
}