Form Method post convert code behind.

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ASP.NET

.NET

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Hi guys I have a problem.

Now, I try to implement payment module within my project.

So they send samples for implements like this.

<%

      String hashstr = clientId + oid + amount + okUrl + failUrl + islemtipi + taksit + rnd + storekey;
      System.Security.Cryptography.SHA1 sha = new System.Security.Cryptography.SHA1CryptoServiceProvider();
      byte[] hashbytes = System.Text.Encoding.GetEncoding("ISO-8859-9").GetBytes(hashstr);
      byte[] inputbytes = sha.ComputeHash(hashbytes);

      String hash = Convert.ToBase64String(inputbytes);


  %>
  <form action="xxxxx" method="POST">
         <input type="hidden" name="clientid" value="<%=clientId%>">
              <input type="hidden" name="amount" value="<%=amount%>">

              <input type="hidden" name="oid" value="<%=oid%>">
              <input type="hidden" name="okUrl" value="<%=okUrl%>" >
              <input type="hidden" name="failUrl" value="<%=failUrl%>" >
              <input type="hidden" name="rnd" value="<%=rnd%>" >
              <input type="hidden" name="hash" value="<%=hash%>" >

              <input type="hidden" name="storetype" value="3d_pay_hosting" >
      <input type="submit" name="submit" value="Send">
  </form>

So this code run very well when I press the button my page direct to bank page and than in there customer charges the money after that it return my okUrl.

But my problem I have to use this code in page which under the master page and there are many button in this web page. How can I perform this scenario very well.

Some code samples that I search on the internet says you have to use WebRequest like this.

StringBuilder builderValues = new StringBuilder();
             builderValues.Append("&okUrl=" + "http://xxx.com/Payment/" + oid);

           builderValues.Append("&failUrl=" + "http://xxx.com/Failed/" + oid);

           builderValues.Append("&storetype=3d_pay_hosting");
           ASCIIEncoding encoding = new ASCIIEncoding();
           string postData = builderValues.ToString();
           // Prepare web request...
           byte[] data = new ASCIIEncoding().GetBytes(postData);
           HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create("xxx");
           httpWebRequest.Method = "POST";
           httpWebRequest.ContentType = "application/x-www-form-urlencoded";
           httpWebRequest.ContentLength = data.Length;
           Stream dataStream = httpWebRequest.GetRequestStream();
           dataStream.Write(data, 0, data.Length);
           HttpWebResponse response = (HttpWebResponse)httpWebRequest.GetResponse();
           StreamReader reader = new StreamReader(response.GetResponseStream());
           String responseString = reader.ReadToEnd();
           dataStream.Close();

But that time my page would not redirect to bank page for charges cost.

Can you give some help or suggestion please.

Thanks.