post data through httpWebRequest

var request = WebRequest.Create("http://foo"); request.Method = "POST"; request.ContentType = "application/x-www-form-urlencoded"; using (var writer = new StreamWriter(request.GetRequestStream())) { writer.Write("field=value"); } 

You could et those names by XPath e.g. and user them like:

byte[] data = new ASCIIEncoding().GetBytes("textBoxName1=blabla"); HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create("http://localhost/myservlet"); httpWebRequest.Method = "POST"; httpWebRequest.ContentType = "application/x-www-form-urlencoded"; httpWebRequest.ContentLength = data.Length; Stream myStream = httpWebRequest.GetRequestStream(); myStream.Write(data,0,data.Length); myStream.Close(); 

It looks like you will have to get the page with a HttpWebRequest and parse the content of the corresponding HttpWebResponse to find out the names of text boxes. Then you submit the values to the page by using another HttpWebRequest.

So basically, what you need to do is the following:

1. Issue a HttpWebRequest with GET method to the URL where the page with text boxes is located
2. Get the response stream of the HttpWebResponse
3. Parse the page contained in the response stream and get the names of text boxes. You can use HTML Agility Pack for this purpose.
4. Issue a HttpWebRequest with POST method, with content type set to "application/x-www-form-urlencoded" and key-value pairs as the content.

First part of your problem: Maybe the HTML tree is stable. Then you can find your way to the textbox of your interrest with XPath. Use XmlReader, XDocument and Linq to go throught it.

I use this function to post data. But the url you pass has to be formatted as such for example

http://example.com/login.php?userid=myid&password=somepassword

Private Function GetHtmlFromUrl(ByVal url As String) As String If url.ToString() = vbNullString Then Throw New ArgumentNullException("url", "Parameter is null or empty") End If Dim html As String = vbNullString Dim request As HttpWebRequest = WebRequest.Create(url) request.ContentType = "Content-Type: application/x-www-form-urlencoded" request.Method = "POST" Try Dim response As HttpWebResponse = request.GetResponse() Dim reader As StreamReader = New StreamReader(response.GetResponseStream()) html = Trim$(reader.ReadToEnd) GetHtmlFromUrl = html Catch ex As WebException GetHtmlFromUrl = ex.Message End Try End Function