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author's profile photo Former Member
Former Member

default value of DropDownByIndex

Posted on Oct 19, 2006 at 03:29 PM 9 Views

hello,

i am searching for the possibility to access the default value of a dropdown element in java WebDynpro. I exactly mean the "blank" value in the top of a drop down box.

In my scenario i want to display different data in a table related to the selected values in the drop down box. If the user choose the "blank" data should be diplayed as well.

does anyone have a idea??

thanks in advance,

regards,

rene

UI Web Dynpro Java
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3 Answers

  • Best Answer
    author's profile photo Roberto Tagliento
    Roberto Tagliento
    Posted on Oct 19, 2006 at 06:24 PM

    This line set to the default FIRST LINE BLANK

    wdContext.nodeYOUR_NODE().setLeadSelection(-1);

    This control say you if BLANK line is selected

    if (wdContext.nodeYOUR_NODE().getLeadSelection(-1) == -1){

    //BLANK CASE

    }

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    • Former Member Former Member
      Oct 20, 2006 at 08:37 AM

      Hello,

      i solved it. The problem with the null pointer exception was not caused by the coding Arming suggested. Arming your solution helped me. Thanks!

      best regards,

      Rene

  • author's profile photo Former Member
    Former Member
    Posted on Oct 19, 2006 at 05:26 PM

    A DropDownByIndex displays an empty value if the node to which it is bound has no lead selection.

    Example:

    dropdown.texts -> SomeNode.SomeAttribute

if (wdContext.nodeSomeNode().getLeadSelection() == IWDNode.NO_SELECTION)
{
  /* drop-down displays empty value */
}

    Armin

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  • author's profile photo Former Member
    Former Member
    Posted on Oct 19, 2006 at 03:38 PM

    hi

    If I get your problem correctly you are trying to display data in the table that has beeb selected from the dropdown.if this is the case then what do you expect to be displayed when a blank is seleced.

    thanks

    Lohi.

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