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POST form data from dnn

12/17/2010 7:17 PM

Gus Beare

www.carawaydesign.com
Joined: 1/16/2006

Posts: 178

POST form data from dnn

Hi

I'm trying to build a module to send some parameters AND redirect the user to a payment gateway. The gateway requires POST parameters.
I can't find an easy way to accomplish this in DNN. I think it would be very simple with HTML. But I'm on the learning curve with c# and can't find a simple solution. Ideally I want to build a user control that I can use elsewhere. I have no problem with the control but can't work out a POST with redirect.

Can anyone offer some pointers or code examples?

thanks
Gus

"if the only tool you have is a hammer you tend to see every problem as a nail" http://www.carawaydesign.com

12/18/2010 11:49 AM

Gus Beare

www.carawaydesign.com
Joined: 1/16/2006

Posts: 178

Re: POST form data from dnn Modified By Gus Beare on 12/18/2010 11:51:35 AM

I found some example code which I modified and finally got to work, from here:
http://www.codeproject.com/KB/aspnet/ASP_NETRedirectAndPost.aspx?msg=3703198#xx3703198xx

But I ran into a problem with this error:

"The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>)."

After much struggling I found out that in the DNN Default.aspx there is some code:

<%= HtmlAttributeList %>>

which I removed and the error went away.

Does anyone know what this line above does and if it's needed or not? How do others solve the problem of POST with redirect from DNN?

thanks Gus

"if the only tool you have is a hammer you tend to see every problem as a nail" http://www.carawaydesign.com

12/19/2010 6:15 PM

Store Integrator

Joined: 11/27/2007

Posts: 238

Re: POST form data from dnn

Hi,

You cannot change the controls once the server has served your page. Once you do a remote post you have the client (browser) redirected to the gateway. In the url you have actually no critical data. This data is in the form itself and thus more secure than if a url would be intercepted. You can code something like below and have it executed on any control. It will end the response to the server and then redirect to the payment gateway.

J.

        /// <summary>
        /// Post the current values to the specified URL. The values will be written as hidden fields.
        /// </summary>
        public void Post()
        {
            //Build the used form.
            HttpContext.Current.Response.Clear();
            HttpContext.Current.Response.Write("<html><Head></Head>");
            HttpContext.Current.Response.Write(string.Format("<body onload=\"document.{0}.submit()\">", mFormName));
            HttpContext.Current.Response.Write(string.Format("<form name=\"{0}\" method=\"{1}\" action=\"{2}\" >", mFormName, mMethod, mUrl));

            for (int i = 0; i < mInputs.Keys.Count; i++)
            {
                HttpContext.Current.Response.Write(string.Format("<input name=\"{0}\" type=\"hidden\" value=\"{1}\">", mInputs.Keys[i], mInputs[mInputs.Keys[i]]));
            }
            HttpContext.Current.Response.Write("</form>");
            HttpContext.Current.Response.Write("</body></html>");
            HttpContext.Current.Response.End();
        }

1/11/2011 8:02 AM

Gus Beare

www.carawaydesign.com
Joined: 1/16/2006

Posts: 178

Re: POST form data from dnn

thanks for the help

I was under the cosh to deliver so I never got back to respond. Sorry about that.

I solved the problem when using the example in this article:

http://www.vbdotnetheaven.com/Uploadfile/desaijm/ASPNetPostURL11112005054933AM/ASPNetPostURL.aspx

"if the only tool you have is a hammer you tend to see every problem as a nail" http://www.carawaydesign.com

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POST form data from dnn

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