I wrote a program to retrieve price list everyday and the code I used is something like below:
Dim URL as string = "https://technet.rapaport.com/HTTP/Prices/CSV2_Round.aspx
Dim webRequest As System.Net.WebRequest = System.Net.WebRequest.Create(URL)
webRequest.Method = "POST"
webRequest.ContentType = "application/x-www-form-urlencoded"
Dim reqStream As Stream = webRequest.GetRequestStream()
Dim postData As String = "username=xxx&password=xxx"
Dim postArray As Byte() = Encoding.ASCII.GetBytes(postData)
reqStream.Write(postArray, 0, postArray.Length)
I can get the most updated price list by using the above code. However, for some reason, I need to get back the price list of some days ago, e.g. price list of 2010/10/31. So is that a way to get back the previous price list ?