How do I authenticate a WebClient request

Question

I am making a call to a page on my site using webclient  I m trying to get the result of the webpage put into a pdf so I am trying to get a string representation of the rendered page  The problem is that the request is not authenticated so all I get is a login screen  I have sent the UseDefaultCredentials property to true but I still get the same result  Below is a portion of my code    WebClient webClient   new WebClient     webClient Encoding   Encoding UTF8    webClient UseDefaultCredentials   true   return Encoding UTF8 GetString webClient UploadValues link   POST  form

User · Answer

You need to give the WebClient object the credentials   Something like this      WebClient client   new WebClient     client Credentials   new NetworkCredential  username    password

User · Answer

What kind of authentication are you using  If it s Forms authentication  then at best  you ll have to find the  ASPXAUTH cookie and pass it in the WebClient request   At worst  it won t work

User · Answer

Public Function getWeb ByRef sURL As String  As String     Dim myWebClient As New System Net WebClient        Try         Dim myCredentialCache As New System Net CredentialCache           Dim myURI As New Uri sURL          myCredentialCache Add myURI   ntlm   System Net CredentialCache DefaultNetworkCredentials          myWebClient Encoding   System Text Encoding UTF8         myWebClient Credentials   myCredentialCache         Return myWebClient DownloadString myURI      Catch ex As Exception         Return  Exception    amp  ex ToString       End Try End Function

User · Answer

This helped me to call API that was using cookie authentication  I have passed authorization in header like this  request Headers Set  quot Authorization quot   Utility Helper ReadCookie  quot AuthCookie quot       complete code     utility method to read the cookie value          public static string ReadCookie string cookieName                        var cookies   HttpContext Current Request Cookies              var cookie   cookies Get cookieName               if  cookie    null                  return cookie Value              return null                using statements where you are creating your webclient using System Web Script Serialization  using System Net  using System IO      WebClient   var requestUrl    quot  lt API url gt  quot   var postRequest   new ClassRoom   name    quot kushal seth quot      using  var webClient   new WebClient            JavaScriptSerializer serializer   new JavaScriptSerializer          byte   requestData   Encoding ASCII GetBytes serializer Serialize postRequest          HttpWebRequest request   WebRequest Create requestUrl  as HttpWebRequest        request Method    quot POST quot         request ContentType    quot application json quot                                 request ContentLength   requestData Length        request ContentType    quot application json quot         request Expect    quot application json quot         request Headers Set  quot Authorization quot   Utility Helper ReadCookie  quot AuthCookie quot           request GetRequestStream   Write requestData  0  requestData Length          using  var response    HttpWebResponse request GetResponse               var reader   new StreamReader response GetResponseStream              var objText   reader ReadToEnd       objText will have the value

[c#] How do I authenticate a WebClient request?

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