Http Client Protocol Issues (and other fun stuff I support)

This took me a couple of minutes to find so I thought I would share this here. I downloaded ProcMon (process monitor) and could view the help file. It would open but the right pane had a message: "Navigation to the webpage was canceled" The left pane...

I see some horrible solutions for this out on the web. Most involve setting the proxy for the entire machine and then toggling it back off. Here is a class that will allow you to set it ONLY FOR THE PROCESS that the control is hosted in. You could call...

This error message is caused because the process is not being able to validate the Server Certificate supplied by the Server during an HTTPS (SSL) request. The very first troubleshooting step should be to see if the server supplied certificate and every...

Please send me a message or leave a comment to let me know if this Post helped you! When you try to make an HTTP request in an application that is built on the .NET Framework, you may receive one or more of the following error messages or Exceptions...

Strange. I found in my personal website the Child menus were not showing when I hovered over the root menu item. There is nothing special about the menus. They are standard asp:menu items created when I dragged the menu tool from the navigation tools...

The following vb Script can fail with an "Access is denied" error message: Dim aRequest Set aRequest = CreateObject ("Microsoft.XMLHTTP") aRequest.Open "POST"," http://www.contoso.com/PostAccepter.aspx",False aRequest.setRequestHeader "Content-Type...

Your get one of these errors when running Internet Explorer: Stop running this script? A script on this page is causing Internet Explorer to run slowly. If it continues to run, your computer might become unresponsive. "A script on this page is causing...

Creating a WCF Client in Visual Studio 2010, I struggled with this error. I was running as the currently logged on user and the service was as well so this made no sense to me. I found that this entry in the client app.config was the culprit: <identity>...

There seems to be no simple end-to-end walkthrough for creating a simple HttpListener based SSL Listener that includes how to configure the computer by generating and installing a Certificate for this listener. Basic concepts covered: Write the...

This was an interesting error that I had to hunt down. When specifying a proxy server in .NET like this: WebProxy("https://someproxyserver") you will get this error. You will get this error for whatever scheme that you enter before the "://" characters...

There are two different structures you can query in order to retrieve server certificate information. You must do some sort of request to complete the SSL server certificate exchange, and then you can retrieve this information. Here is an example of that...

The following code worked fine on IIS 6 but when used on IIS it failed: System.DirectoryServices. DirectoryEntry iisServer; iisServer = new System.DirectoryServices. DirectoryEntry ( "IIS://jsanders4/W3SVC/1" ); System.DirectoryServices. DirectoryEntry...

To understand these settings you need to understand how the HttpWebRequest class relates to the ServicePointManager and ServicePoint classes. When you make a request with the HttpWebRequest class, the ServicePointManager provides a ServicePoint object...

Understanding Problems with MS10-049, KB 980436 and IETF RFC5746 Microsoft released a Security update MS10-049: Vulnerabilities in SChannel could allow remote code execution. This update patches vulnerabilities in SChannel (TLS) that can be exploited...

A little know fact is that the .NET framework will use the stored credentials in the Credential Manager when accessing a network resource if the credentials exist for that particular resource (host). I intend to clear up how this functionality works for...

I was anxious to see what real memory usage would look like on my low end netbook. It was better than Windows 7! Less than 500M. One problem I had was the native resolution of my netbook is1024X600 and the will not load Windows Store applications at that...

Moved to our new blog here: http://blogs.msdn.com/b/wsdevsol/archive/2012/10/04/walkthrough-creating-an-iis-server-to-use-with-wns-push-notifications-and-windows-store-apps.aspx

You may get an error similar to this when running your WinHttp application: Error: The server name or address could not be resolved Code: 80072EE7 Source: WinHttp.WinHttpRequest The familiar ProxyCfg application allows you to set the proxy settings...

There are two settings for WinHttp Proxy settings for a 64 Bit OS. One applies to the 64 bit environment and one for the 32 bit environment. You can use netsh for Windows 2008, Windows 7 and later OSes and proxycfg.exe for earlier OSes. If you are confused...

WinhttpTracecfg.exe for Vista does not exist, so how can you get a WinHttp trace in Vista and above? WinHttpTraceCfg.exe has been replaced in Vista and above with the netsh winhttp command. see this blog: http://blogs.msdn.com/wndp/archive/2007/03...

Quickie post... If you have a default printer selected on your system, then this HTML page with jscript should print without showing the printer selection dialog (I will embellish this post later if I have time): <! DOCTYPE html PUBLIC "-...

Problem Taking a System.Net Trace (see My Favorite System.Net Tracing File ) you will see that the HttpWebRequest is trying to use a .INS file. System.Net Verbose: 0 : [0371] WebRequest::Create( http://myserver/ie/update/windows/IEConfig.INS ) ...

Prashant from my team found this interesting issue. I will blog it here until the KB comes out on this. Problem ====== WebService server responds back with a HTTP 400 error when using PreAuthenticate on the WebServiceProxy class. This results in a...

By design the WebBrowser Control does not close the parent Form when WebBrowser Control is closed. Here is one way you can accomplish this. The WebBrowser will send a WM_NOTIFYPARENT notification that can be captured and an event raised that a host...

I have an old (circa 2007) Dell Inspirion 1521 laptop and wanted to get a better Video driver installed for Windows 8. I found a Vista 64 bit driver on the Dell site that seems to work very well (compared to the generic drivers): http://www.dell.com/support...