.net post form in code behind

Question

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.<

Answer 1

This might help you.

string URI = "http://www.myurl.com/post.php";
string myParamters = "param1=value1&param2=value2";

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

Answer 2

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

Answer 3

This is simples example. postData depends of form

String postData = "Name=" + Username +
              "&Password=" + Password +
              "&Retype=" + Password +
              "&Email=" + HttpUtility.UrlEncode(EmailAddress) +
              "&RealName=" + String.Format("{0}+{1}", FirstName.Replace(" ", "+"), LastName.Replace(" ", "+"));

Now create request and post data:

HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(url);
request.Method = WebRequestMethods.Http.Post;
request.ContentLength = postData.Length;
request.ContentType = "application/x-www-form-urlencoded";
request.KeepAlive = false;

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();

You can use Fiddler in order to catch how postData looks.

Answer 4

Try like this.

using (WebClient client = new WebClient())
   {

       byte[] response = client.UploadValues("http://dork.com/service", new NameValueCollection()
       {
           { "home", "Cosby" },
           { "favorite+flavor", "flies" }
       });
   }

You will need these includes:

using System;
using System.Collections.Specialized;
using System.Net;

If you're insistent on using a static method/class:

public static class Http
{
    public static byte[] Post(string uri, NameValueCollection pairs)
    {
        byte[] response = null;
        using (WebClient client = new WebClient())
        {
            response = client.UploadValues(uri, pairs);
        }
        return response;
    }
}

Then simply:

Http.Post("http://dork.com/service", new NameValueCollection() {
    { "home", "Cosby" },
    { "favorite+flavor", "flies" }
});