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ASP.NET Post to another website

Posted on 2011-03-13
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Last Modified: 2012-05-11
I am trying to create a screen scrape app that will post a parameter to this site http://dsbs.sba.gov/dsbs/search/dsp_dsbs.cfm and then write the response to my screen. Here is the app that I tried to complete but it is saying that session cookies are not enabled. Any help would be appreciated.
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As EventArgs) Handles Button1.Click
        Dim poststring As String = [String].Format("CageCD={0}", "26895")
        ResponseResult.Text = "<hr/>" & GetResponseString("http://dsbs.sba.gov/dsbs/search/dsp_dsbs.cfm", poststring)
    End Sub
    Public Function GetResponseString(ByVal url As String, ByVal poststring As String) As [String]
        Dim httpRequest As HttpWebRequest = DirectCast(WebRequest.Create("http://dsbs.sba.gov/dsbs/search/dsp_dsbs.cfm"), HttpWebRequest)

        httpRequest.Method = "POST"
        httpRequest.ContentType = "application/x-www-form-urlencoded"

        Dim bytedata As Byte() = Encoding.UTF8.GetBytes(poststring)
        httpRequest.ContentLength = bytedata.Length

        Dim requestStream As Stream = httpRequest.GetRequestStream()
        requestStream.Write(bytedata, 0, bytedata.Length)
        requestStream.Close()


        Dim httpWebResponse As HttpWebResponse = DirectCast(httpRequest.GetResponse(), HttpWebResponse)
        Dim responseStream As Stream = httpWebResponse.GetResponseStream()

        Dim sb As New StringBuilder()

        Using reader As New StreamReader(responseStream, System.Text.Encoding.UTF8)
            Dim line As String
            While (InlineAssignHelper(line, reader.ReadLine())) IsNot Nothing
                sb.Append(line)
            End While
        End Using

        Return sb.ToString()

    End Function
    Private Shared Function InlineAssignHelper(Of T)(ByRef target As T, ByVal value As T) As T
        target = value
        Return value
    End Function

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Question by:jimseiwert
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