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Tip/Trick

Resolving PostBackUrl and button_Click Events

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4.55/5 (4 votes)
21 Jun 2011CPOL 20.4K   2   4
How to execute code in the current page AFTER navigating to a new page.

I'm working on a web site that contains a button. Originally, this button had an event handler that performed some processing and then called Response.WriteFile, which in turn caused the current page to be replaced with the file being written. This was not the desired behavior, so I added a PostbackUrl element to bring up the other page in a new window. Imagine my dismay to discover that specifying a PostbackUrl causes the page to NOT fire the Click event for the button.

My workaround comprised of two steps:

  1. In the page being navigated FROM, move the code out of the event handler into a public method.
  2. In the page being navigated TO, add the following line to the Page_Load event handler:
    C#
    ((MyPreviousPage)(Page.PreviousPage)).MyPublicMethod();

    or for VB:

    VB
    CType(Page.PreviousPage, MyPreviousPage).MyPublicMethod()

License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


Written By
Software Developer (Senior) Paddedwall Software
United States United States
I've been paid as a programmer since 1982 with experience in Pascal, and C++ (both self-taught), and began writing Windows programs in 1991 using Visual C++ and MFC. In the 2nd half of 2007, I started writing C# Windows Forms and ASP.Net applications, and have since done WPF, Silverlight, WCF, web services, and Windows services.

My weakest point is that my moments of clarity are too brief to hold a meaningful conversation that requires more than 30 seconds to complete. Thankfully, grunts of agreement are all that is required to conduct most discussions without committing to any particular belief system.

Comments and Discussions

 
GeneralReason for my vote of 2 It is not working... Pin
ramakant dewangan18-Aug-11 0:20
ramakant dewangan18-Aug-11 0:20 
GeneralRe: You're doing it wrong. Pin
#realJSOP18-Aug-11 1:23
mve#realJSOP18-Aug-11 1:23 
GeneralReason for my vote of 3 Informative and a workaround only. [... Pin
manish.kungwani30-Jun-11 5:48
manish.kungwani30-Jun-11 5:48 
GeneralRe: That's precisely the nature of tips/tricks. I certainly thin... Pin
#realJSOP30-Jun-11 23:11
mve#realJSOP30-Jun-11 23:11 

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