Home/ Questions/Q 8212573
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-06-07T10:48:10+00:00

I wanna make a post form in code behind. I have simple html post

  • 0

I wanna make a post form in code behind. I have simple html post is working but when I try make it WebRequest I can’t make it work.

Thanks for you time in advance.

this is working > 

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
    <title>Untitled Page</title>
</head>
<body>
<form action="http://www.pay-pos.com/test.php" method="post">
<textarea name="datafromuser">
<CC5Request><Name>Mert</Name><Password>123</Password><ClientId>1058</ClientId><IPAddress>213.456.654.456</IPAddress><Adress>asdsa</Adress><OrderId>123</OrderId><Type>Auth</Type>
<Number>4522115422659661</Number><ExpiresAy>01</ExpiresAy><ExpiresYil>13</ExpiresYil><Cvv2Val>123</Cvv2Val><Total>10</Total><Taksit></Taksit><Kdv>18</Kdv><BankaID>1</BankaID>
<TcKimlik>12345678912</TcKimlik></CC5Request>
</textarea>
<input type="submit" value="aaa" />
</form>
</body>
</html>

This isn’t working >

String ali = "<CC5Request><Name>Mert</Name><Password>123</Password><ClientId>xxxx</ClientId><IPAddress>213</IPAddress><Adress>asdsa</Adress>" +
                        "<OrderId>123</OrderId><Type>Auth</Type><Number>1234567891234567</Number><ExpiresAy>01</ExpiresAy><ExpiresYil>13</ExpiresYil><Cvv2Val>123</Cvv2Val>" +
                        "<Total>10</Total><Taksit></Taksit><Kdv>xx</Kdv><BankaID>1</BankaID><TcKimlik>12345678912</TcKimlik></CC5Request>";
                    WebRequest req = WebRequest.Create("http://www.pay-pos.com/test.php?datafromuser=" + ali);
                    req.Credentials = CredentialCache.DefaultCredentials;
                    req.Method = "POST";
                    HttpWebResponse loWebResponse = (HttpWebResponse)req.GetResponse();
                    Encoding enc = Encoding.GetEncoding(1254); 

                    StreamReader loResponseStream =

                       new StreamReader(loWebResponse.GetResponseStream(), enc);

                    string lcHtml = loResponseStream.ReadToEnd();
                    loWebResponse.Close();
                    loResponseStream.Close();

EDIT: EXPERIMENT 1

String postData = "Name=Mert" +
              "&Password=123" +
              "&ClientId=1058" +
              "&IPAddress=213.456.654.456" +
              "&Adress=asdsa" +
              "&OrderId=123" +
              "&Type=Auth" +
              "&Number=4522115422659661" +
              "&ExpiresAy=01" +
              "&ExpiresYil=13" +
              "&Cvv2Val=123" +
              "&Total=10" +
              "&Taksit=1" +
              "&Kdv=18" +
              "&BankaID=1" +
              "&TcKimlik=12345678912";

            string URI = "http://www.pay-pos.com/test.php";

            WebClient wc = new WebClient();
            wc.Headers["Content-type"] = "application/x-www-form-urlencoded";
            string HtmlResult = wc.UploadString(URI, postData);

EXPERIMENT 2 

 HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create("http://www.pay-pos.com/test.php");
        request.Method = WebRequestMethods.Http.Post;
        request.ContentLength = postData.Length;
        request.ContentType = "application/x-www-form-urlencoded";
        request.KeepAlive = false; //also tried true as well

        StreamWriter writer = new StreamWriter(request.GetRequestStream());
        writer.Write(postData);
        writer.Close();
        HttpWebResponse response = (HttpWebResponse)request.GetResponse();
        StreamReader reader = new StreamReader(response.GetResponseStream());
        String responseString = reader.ReadToEnd();

        response.Close();

EXPERIMENT 3 !!!WORKING!!!

String ali = "datafromuser=<CC5Request><Name>Mert</Name><Password>123</Password><ClientId>1058</ClientId><IPAddress>213.456.654.456</IPAddress><Adress>asdsa</Adress><OrderId>123</OrderId><Type>Auth</Type>" +
"<Number>4522115422659661</Number><ExpiresAy>01</ExpiresAy><ExpiresYil>13</ExpiresYil><Cvv2Val>123</Cvv2Val><Total>10</Total><Taksit></Taksit><Kdv>18</Kdv><BankaID>1</BankaID>"+
"<TcKimlik>12345678912</TcKimlik></CC5Request>";

            byte[] byteArray = System.Text.Encoding.UTF8.GetBytes(ali);

            WebRequest req = WebRequest.Create("http://www.pay-pos.com/test.php");

            req.ContentType = "application/x-www-form-urlencoded"; 
            req.ContentLength = byteArray.Length;
            req.Method = "POST"; 

            Stream dataStream = req.GetRequestStream(); 
            dataStream.Write(byteArray, 0, byteArray.Length); 
            dataStream.Close();

            HttpWebResponse response = (HttpWebResponse)req.GetResponse();
            StreamReader reader = new StreamReader(response.GetResponseStream());
            String responseString = reader.ReadToEnd();

            response.Close();
Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    The first thing I see wrong is that you’re trying to use a query string to post the form data. Your “form data” should be like so:

     String ali = "datafromuser=<CC5Request><Name>Mert</Name><Password>123</Password><ClientId>xxxx</ClientId><IPAddress>213</IPAddress><Adress>asdsa</Adress>" +
                            "<OrderId>123</OrderId><Type>Auth</Type><Number>1234567891234567</Number><ExpiresAy>01</ExpiresAy><ExpiresYil>13</ExpiresYil><Cvv2Val>123</Cvv2Val>" +
                            "<Total>10</Total><Taksit></Taksit><Kdv>xx</Kdv><BankaID>1</BankaID><TcKimlik>12345678912</TcKimlik></CC5Request>";

    Next, you need to get the bytes[] from your form data.

    byte[] byteArray = Encoding.UTF8.GetBytes(ali);

    Set some headers:

    req.ContentType = "application/x-www-form-urlencoded"; 
req.ContentLength = byteArray.Length;
req.Method = "POST";

    Now write your data to the request stream.

    Stream dataStream = req.GetRequestStream(); 
dataStream.Write(byteArray, 0, byteArray.Length); 
dataStream.Close();

    Finally… get your response. Also note, anything that implements IDisposable should be wrapped in a using statement, i.e. Stream and WebResponse.

    Also note that the submit button is not part of your form post data. It’s possible the server is expecting it.

    Edit: Here’s a complete example from Microsoft that guides you step by step.

    http://msdn.microsoft.com/en-us/library/debx8sh9.aspx

    • 0