I have a file at a URI that I would like to read using StreamReader. Obviously, this causes a problem since File.OpenText does not support URI paths. The file is a txt file
Is there a specific requirement to use StreamReader? Unless there is, you can use the WebClient class:
var webClient = new WebClient();
string readHtml = webClient.DownloadString("your_file_path_url");
You could try using the HttpWebRequestClass, or WebClient. Here's the slightly complicated web request example. It's advantage over WebClient is it gives you more control over how the request is made:
HttpWebRequest httpRequest = (HttpWebRequest) WebRequest.Create(lcUrl);
httpRequest.Timeout = 10000; // 10 secs
httpRequest.UserAgent = "Code Sample Web Client";
HttpWebResponse webResponse = (HttpWebResponse) httpRequest.GetResponse();
StreamReader responseStream = new StreamReader(webResponse.GetResponseStream());
string content = responseStream.ReadToEnd();
If you are behind a proxy don't forget to set your credentials:
WebRequest request=WebRequest.Create(url);
request.Timeout=30*60*1000;
request.UseDefaultCredentials=true;
request.Proxy.Credentials=request.Credentials;
WebResponse response=(WebResponse)request.GetResponse();
using (Stream s=response.GetResponseStream())
...