asp.net web page request post parameters

Question

With the code below I can request a page with post parameters. But the page requested couldn't get the parameters. I put two textboxes to the requested page and send parameters to this page. What is wrong with this code?

private string PostForm(string _targetUrl, string _parameter1, string _parameter2)
{

    WebRequest request = WebRequest.Create(_targetUrl);

    request.Method = "POST";

    request.ContentType = "application/x-www-form-urlencoded";

    string postContent = string.Format("Textbox1={0}&Textbox2={1}", _parameter1, _parameter2);

    byte[] postContentBytes = Encoding.ASCII.GetBytes(postContent);

    request.ContentLength = postContentBytes.Length;

    Stream writer = request.GetRequestStream();

    writer.Write(postContentBytes, 0, postContentBytes.Length);

    writer.Close();

    HttpWebResponse testResponse = (HttpWebResponse)request.GetResponse();

    if (!testResponse.StatusDescription.Equals("OK", StringComparison.InvariantCultureIgnoreCase))
    {
        Response.Write("Error");
    }

    StreamReader sr = new StreamReader(testResponse.GetResponseStream());
    string returnvalue = sr.ReadToEnd();

    return returnvalue;
}

How can I post the requested page's form? For sample I didn't put a button to the page. Should I put a submit button and call it? If yes how? — Oktay
– Oktay, Commented Oct 30, 2012 at 10:32
I can read parameters with Request.Form["Textbox1"]. But the page can't set textbox value as soon as page requested. — Oktay
– Oktay, Commented Oct 30, 2012 at 10:44

Francois · Accepted Answer · 2012-10-30 10:22:29Z

1

Make sure that "name" of textbox inputs on the target page are Textbox1 and Textbox2.

answered Oct 30, 2012 at 10:22

Francois

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3 Comments

Oktay Over a year ago

<html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server">     <title></title> </head> <body>     <form id="form1" runat="server">     <div>     <asp:textbox ID="Textbox1" runat="server"></asp:textbox>     <asp:textbox ID="Textbox2" runat="server"></asp:textbox> </asp:Button>      </div>     </form> </body> </html>

Francois Over a year ago

You want the page to display with values in textbox inputs? You can't do like this (viewstates, aspnet validation...). But I don't understand what you want to do...

Oktay Over a year ago

It is a sample form. I want to send parameters to an external url and submit that form.

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