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Which code segment should you use?

You are implementing a method named ProcessFile that retrieves data files from web servers and
FTP servers. The ProcessFile () method has the following method signature:
Public void ProcessFile(Guid dataFileld, string dataFileUri)
Each time the ProcessFile() method is called, it must retrieve a unique data file and then save the
data file to disk.
You need to complete the implementation of the ProcessFile() method. Which code segment should
you use?

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A.
Option A

B.
Option B

C.
Option C

D.
Option D

Explanation:
* WebRequest.Create Method (Uri)
Initializes a new WebRequest instance for the specified URI scheme.
* Example:
1. To request data from a host server
Create a WebRequest instance by calling Create with the URI of the resource.
C#
WebRequest request = WebRequest.Create(“http://www.contoso.com/”);
2. Set any property values that you need in the WebRequest. For example, to enable authentication,
set the Credentials property to an instance of the NetworkCredential class.
C#
request.Credentials = CredentialCache.DefaultCredentials;
3. To send the request to the server, call GetResponse. The actual type of the returned
WebResponse object is determined by the scheme of the requested URI.
C#
WebResponse response = request.GetResponse();
4. To get the stream containing response data sent by the server, use the GetResponseStream
method of the WebResponse.
C#
Stream dataStream = response.GetResponseStream ();

5 Comments on “Which code segment should you use?

  1. ivannathan says:

    D – works and correct answer
    ——
    A – closes stream before it was read. Exception.
    B – FileWebRequest.Create returns WebRequest type and casting to FileWebRequest returns null
    C – StreamWriter accepts path or stream to write into while ResponseStream doesn’t allow to write in it




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