INamingContainer and ClientID for nested Composite Controls -Guidance needed

Discussion in 'ASP .Net Building Controls' started by Greg Woods, Mar 19, 2008.

  1. Greg Woods

    Greg Woods Guest

    I have created a series of Composite Controls, inheriting from
    CompositeControl, which of course implements INamingContainer. Below
    is a snippet of simplified code to show how I'm using these controls
    in the page.
    (The reason I've rolled my own tabcontrol, and why I've used my own
    string translation are out of scope of this question)

    <cc:TabControl ID="TabControl" runat="server">
    <cc:Tab Text="SITE_INC19" ID="TabMain" runat="server">
    <cc:LabelledWrapper ID="EndDateRow" runat="server"
    <cc:DateControl ID="EndDate" Text="ENDDATE"
    format="EditNoLabel" runat="server" />
    NavigateURL="javascript:removeEndDate()" runat="server" Text="REMOVE" /</cc:LabelledWrapper>

    Since I give each nested control its' own unique ID, I have no need
    for the default naming of INamingContainer.

    Also, considering the DateControl, which will render a textbox, I
    would prefer the rendered textbox have the ID of the overall control,
    in this case "EndDate", instead of
    "TabControl_TabMain_EndDateRow_EndDate_EndDate_date". For the
    constituent controls which make up the DateControl, I don't care what
    ID they are given - in fact as they are mostly labels and such which I
    never need to access using javascript, I actually have no need for
    them to have a rendered ID.

    The problem with the default behaviour is that it is
    * not needed, as I give unique Ids where appropriate
    * means i have to have server side code to determine clientIds in my
    javascript, instead of being to simply set it to the id of the control
    - i.e. I cannot hardcode: document.getElementById("EndDate") into a
    static .js file.
    * bloated html - elements - many of which have no need for any id

    As I'm fairly new to .NET, and very new to creating controls, what is
    my best option? Other related posts suggest stick with the official MS
    way of doing it - despite the issues I mention. Do I drop the use of
    CompositeControl, and add lots of 'EnsureChildControls' calls in my
    code? I'm open to suggestions.

    Thanks in advance

    Greg Woods
    Greg Woods, Mar 19, 2008
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  2. Greg Woods

    Teemu Keiski Guest

    You can override the rendering or you can use custom helper solutions such
    as IDOverride:

    Getting the ID for scripting in server-side code isn't too hard, therefore
    controls have ClientID property.
    Teemu Keiski, Mar 19, 2008
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  3. Peter Bucher [MVP], Apr 1, 2008
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