How do I convert use of MSXML2.SERVERXMLHTTP from Classic ASP to C# in ASHX

For years we have been using the following vb code in a Classic ASP page to retrieve data from a software product.
To boost performance and get away from Classic ASP, I need to ASHX C# equivalent of the following

//set h = CreateObject("MSXML2.SERVERXMLHTTP")
//h.open"POST", "http://localhost/isapi/webapi.dll" //this is a software provided dll that accepts xml objects and returns xml response objects
//h.setOption(2) = 4096
//h.send(doc)
//response.Write("<br><textarea rows=\"20\" cols=\"60\">" + h.responseText + "</textarea>");
//for each response in h.responseXml.selectnodes("//Response")
//response.Write("<br><textarea rows=\"20\" cols=\"60\">" + response.xml + "</textarea>");
//next
runner.txt

ASPASP.NETVB ScriptC#

Last Comment

Ryan Chong

8/22/2022 - Mon

Big Monty

11/10/2017

here's an example taken from here:

using System;
using MSXML2;  // Need to add a reference to C:\Windows\System32\msxml3.dll
 
namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Start");
 
            ServerXMLHTTP srv = new ServerXMLHTTP();
            srv.open("GET", @"http://www.hamiltonitblog.com", false,null,null);
            srv.send("");
 
            Console.WriteLine(srv.responseText);
 
            Console.ReadKey();
        }
    }
}

Open in new window

Keith McElroy

11/10/2017

ASKER

I found and tried this before posting.
The ashx page tolerates the using MSXML2 but when I introduce ServerXMLHTTP srv = new ServerXMLHTTP();
the page errs. Screenshot of source https://www.screencast.com/t/TFVovTqJ

This example is using GET. My example uses POST and I believe that along with the other parameters are mandatory
for the software provided dll to consume this request.

Need more help specific to the example.

Thanks!

Big Monty

11/10/2017

the attached image doesnt show the error you're getting. Please copy and paste it here.

Your help has saved me hundreds of hours of internet surfing.

fblack61

Keith McElroy

11/10/2017

ASKER

<!DOCTYPE html>

<html xmlns="http://www.w3.org/1999/xhtml">
<head><title>

</title></head>
<body>
<form method="post" action="./DefaultRedirectErrorPage.aspx?aspxerrorpath=%2fFinance%2fxml%2fstyle%2fcustom%2fsjsf%2fTOWEBFRM%2frunner%2frunner.ashx" id="form1">
<div class="aspNetHidden">
<input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="VgIBDmu9oT6Y/7u89GwgU8wHga8mHvyXH6yfTWXMquBaHJ7OivahUHGVMe/MG/qDQ+bqbC5zS69JgC0CwCTy2T3pk2rnyIZjNlM5bdPqHIm3Izs/" />
</div>

<div class="aspNetHidden">

<input type="hidden" name="__VIEWSTATEGENERATOR" id="__VIEWSTATEGENERATOR" value="EAED47BF" />
<input type="hidden" name="__VIEWSTATEENCRYPTED" id="__VIEWSTATEENCRYPTED" value="" />
</div>
<div>

</div>
</form>
</body>
</html>

ASKER CERTIFIED SOLUTION

Ryan Chong

11/10/2017

THIS SOLUTION ONLY AVAILABLE TO MEMBERS.

View this solution by signing up for a free trial.

Members can start a 7-Day free trial and enjoy unlimited access to the platform.

See Pricing Options

Start Free Trial

GET A PERSONALIZED SOLUTION

Ask your own question & get feedback from real experts

Find out why thousands trust the EE community with their toughest problems.