asynchronous, callback, dropdownlist, v2.0

Discussion in 'ASP .Net' started by Alexander Widera, Dec 14, 2005.

  1. Hi,

    i have 3 DropDownLists which are all bound to a seperate SqlDataSource.
    How can I realize the following problem?

    The user selects a value from the first dropdownlist... after this the
    other
    2 dropdownlist should be updated without a PostBack...
    They should be updated asynchronous with a callback.

    Is this posible?

    How?

    Thanks a lot.

    Alex
     
    Alexander Widera, Dec 14, 2005
    #1
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  2. > i have 3 DropDownLists which are all bound to a seperate SqlDataSource.
    > How can I realize the following problem?
    >
    > The user selects a value from the first dropdownlist... after this the
    > other
    > 2 dropdownlist should be updated without a PostBack...
    > They should be updated asynchronous with a callback.
    >
    > Is this posible?


    this is possible and, in fact, quite easy. the trick is called "Scripting
    Callbacks" and you will easily find docs and references.

    Wiktor Zychla
     
    Wiktor Zychla [C# MVP], Dec 14, 2005
    #2
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  3. i used now "ajax". thanks a lot.


    "Wiktor Zychla [C# MVP]" <> schrieb im
    Newsbeitrag news:%...
    >> i have 3 DropDownLists which are all bound to a seperate SqlDataSource.
    >> How can I realize the following problem?
    >>
    >> The user selects a value from the first dropdownlist... after this the
    >> other
    >> 2 dropdownlist should be updated without a PostBack...
    >> They should be updated asynchronous with a callback.
    >>
    >> Is this posible?

    >
    > this is possible and, in fact, quite easy. the trick is called

    "Scripting
    > Callbacks" and you will easily find docs and references.
    >
    > Wiktor Zychla
    >
     
    Alexander Widera, Dec 15, 2005
    #3
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