The following function can be used to perform a HTTP POST in Razor (C#). To use it simply, call the PostWebRequest(...) function with the appropriate parameters.

@functions{
  // Function to help post HTTP request to web service
  private string PostWebRequest(String url, String data, int timeout)
  {
var buffer = System.Text.Encoding.UTF8.GetBytes(data);
System.Net.HttpWebRequest webRequest = (System.Net.HttpWebRequest)System.Net.WebRequest.Create(url);
    webRequest.Timeout = timeout;
    webRequest.Method = "POST";
    webRequest.ContentType = "application/x-www-form-urlencoded";
    webRequest.ContentLength = buffer.Length;


    var requestStream = webRequest.GetRequestStream();
    requestStream.Write(buffer, 0, buffer.Length);
    requestStream.Flush();
    requestStream.Close();

System.Net.HttpWebResponse webResponse = (System.Net.HttpWebResponse)webRequest.GetResponse();
    var streamReader = new System.IO.StreamReader(webResponse.GetResponseStream());
    return streamReader.ReadToEnd();
   
  }

}

@{
  PostWebRequest("http://myurl.com/page.aspx", "d1=val1&d2=val2", 30000);
}