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how to fire a postback event - ASP.NET

Hi, All I design a composite custom control, which has three dropdownlists in it. I find as long as one of the dropdownlist control's id is assigned using uniqueid property of my custom control then a postback event will be fired, but since my dropdownlist has javascript event which does some function and using dropdownlist ids to identify them, since uniqueid is generated dynamaically, it is difficult for my js function know the id, is there any other method to solve the problem, i tried create a hidden type input with id = uniqueid, but it seems postback event can't ...

  1. #1

    Default how to fire a postback event

    Hi, All

    I design a composite custom control, which has three dropdownlists in
    it. I find as long as one of the dropdownlist control's id is assigned
    using uniqueid property of my custom control then a postback event
    will be fired, but since my dropdownlist has javascript event which
    does some function and using dropdownlist ids to identify them, since
    uniqueid is generated dynamaically, it is difficult for my js function
    know the id, is there any other method to solve the problem, i tried
    create a hidden type input with id = uniqueid, but it seems postback
    event can't be fired... needs help thx a lot

    regards
    Kevin
    flashk Guest

  2. #2

    Default Re: how to fire a postback event

    Not much experience with custom controls but this should work. Call
    Page.RegisterRequiresPostBack(control) to request that your parent control
    is notified about the post data. You then need to implement
    IPostBackDataHandler on the control to recieve the postback data.

    hth, Matt

    "flashk" <kevinchu1021> wrote in message
    news:674b2800.0308081128.1e693b1fposting.google.c om...
    > Hi, All
    >
    > I design a composite custom control, which has three dropdownlists in
    > it. I find as long as one of the dropdownlist control's id is assigned
    > using uniqueid property of my custom control then a postback event
    > will be fired, but since my dropdownlist has javascript event which
    > does some function and using dropdownlist ids to identify them, since
    > uniqueid is generated dynamaically, it is difficult for my js function
    > know the id, is there any other method to solve the problem, i tried
    > create a hidden type input with id = uniqueid, but it seems postback
    > event can't be fired... needs help thx a lot
    >
    > regards
    > Kevin

    Matt Dockerty Guest

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