Check if a file URI is HTML or not in the WebClient class

Question

I am downloading a file with the WebClient class, but sometimes the file returns as HTML (I can't do anything about this) What I would like to do is check whether the content is HTML or not using the WebClient class, my code is as follows:

client.DownloadFile(downloadURL, "downloadedfile.zip");

Answer 1

One solution might be to use UrlMon:

• Using .NET, how can you find the mime type of a file based on the file signature not the extension

Another might WebResponse.ContentType:

• http://msdn.microsoft.com/en-us/library/system.net.webresponse.contenttype%28v=vs.71%29.aspx

I believe the latter is simply part of the WebClient response headers:

• http://msdn.microsoft.com/en-us/library/system.net.webclient.responseheaders.aspx

Try whichever looks most promising, and let us know what you find!