Zayko in the Net

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Adding a custom Http header to WCF request (C#)

23. November 2010 15:48 / Vitaly Zayko / / Comments (0)

I was looking for a snippet to add a custom header to WCF service request. Why? For example, to add authentication header to add Basic Authentication support. (Yes – WCF supports Basic Authorization by itself but didn’t find how to use it without SSL).

Here is the shortest way.

Use this snippet on your client side:

 using  (MyServ.ServiceClient  proxy = new  MyServ.ServiceClient ())
 {
     using  (new  System.ServiceModel.OperationContextScope (proxy.InnerChannel))
     {
         MessageHeader  head = MessageHeader .CreateHeader("Authorization" , "http://mynamespace.com/v1" , data);
         OperationContext .Current.OutgoingMessageHeaders.Add(head);
     }
 }

And just in case, here is how to retrieve this information from Http header on the server side:

 string  auth = OperationContext .Current.
     IncomingMessageHeaders.
     GetHeader<string >("Authorization" , "http://mynamespace.com/v1" );

More about OperationContextScope Class here.

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Flash a window in .NET (C#)

5. November 2010 08:48 / Vitaly Zayko / / Comments (0)

For a reason .NET lacks FlushWindowEx function so glad we can PInvoke it.

Declare FlushWindowEx and its dependencies:

 [StructLayout (LayoutKind .Sequential)]
 public  struct  FLASHWINFO
  {
     public  UInt32  cbSize;
     public  IntPtr  hwnd;
     public  Int32  dwFlags;
     public  UInt32  uCount;
     public  Int32  dwTimeout;
 }
 
 [Flags ]
 public  enum  FlashMode
  {
     FLASHW_STOP = 0,
     FLASHW_CAPTION = 1,
     FLASHW_TRAY = 2,
     FLASHW_ALL = (FLASHW_CAPTION | FLASHW_TRAY),
     FLASHW_TIMER = 4,
     FLASHW_TIMERNOFG = 12
 }
 
 [DllImport ("user32.dll" )]
 static  extern  Int32  FlashWindowEx(ref  FLASHWINFO  pwfi);

then just call it like this:

 FLASHWINFO  fw = new  FLASHWINFO ();
 fw.cbSize = Convert .ToUInt32(Marshal .SizeOf(typeof (FLASHWINFO )));
 fw.hwnd = this .Handle;
 fw.dwFlags = (Int32 )FlashMode .FLASHW_ALL;
 fw.uCount = 5;
 FlashWindowEx(ref  fw);

 

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