Invalid URI: The format of the URI could not be determined.

HttpContext.Current.Request.ApplicationPath should get the current application path to which you can add the relative path at run time

Dim uri As New System.Uri(HttpContext.Current.Request.ApplicationPath & "/" & url)

returns the same error

url = "mypage.html"

I am still not exactly sure what you are trying to do, but maybe this will work:

   Dim uri As New Uri("file://" & Request.MapPath("mypage.htm"))

Bob

I am getting html from a page

the page is passed via querystring on the calling funciton and i dont want to pass a full absolute web path.

I just want to pass "Thepage.htm" because it lies in the same directory as the .net page

    Public Function getPageHTML(ByVal url As String) As String

        If System.Uri.IsWellFormedUriString(url, UriKind.Relative) Then
            Dim uri As New System.Uri(HttpContext.Current.Request.ApplicationPath & "/" & url)

            Dim request As HttpWebRequest = WebRequest.Create(uri)

            'Set some reasonable limits on resources used by this request
            request.MaximumAutomaticRedirections = 4
            request.MaximumResponseHeadersLength = 4
            'Set credentials to use for this request.
            request.Credentials = CredentialCache.DefaultCredentials
            Dim response As HttpWebResponse = request.GetResponse()


            'Get the stream associated with the response.
            Dim receiveStream As Stream = response.GetResponseStream()

            'Pipes the stream to a higher level stream reader with the required encoding format.
            Dim readStream As StreamReader = New StreamReader(receiveStream, Encoding.UTF8)

            Dim strResponse As String = readStream.ReadToEnd()
            response.Close()
            readStream.Close()

            Return strResponse
        Else
            Return Nothing
        End If


    End Function

Did you try this?

    Dim uri As New Uri("file://" & Server.MapPath("mypage.htm"))

Bob

that gives the error
Unable to cast object of type 'System.Net.FileWebRequest' to type 'System.Net.HttpWebRequest'.

that worked! Thanks!

Have similar issue on our Verio-Hosted site. Used to work - using below function to retrieve html-text (of an aspx page to email content as a summary/confirmation)

  Protected Function HttpContent(ByVal url As String) As String
    Dim objRequest As WebRequest = System.Net.HttpWebRequest.Create(url)    
    Dim sr As New StreamReader(objRequest.GetResponse().GetResponseStream())
    Dim result As String = sr.ReadToEnd()
    sr.Close()
    Return result
  End Function

Believe security or service pack updates have altered default-behaviour on
    System.Net.HttpWebRequest.Create(url) - call / same-or similar to the above referenced URI -webrequest create...

I changed our code to adapt above solution - unfortunately the usage of the fully qualified path is prohibit on Verio's share webserver and usage results in an Internal-Server-500 error. without the path same result as in my original function - Invalid URI: The format of the URI could not be determined

Does anyone have any other advice?