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Tree control - The Tree control Changed event executes multiple times

  • June 5, 2019
  • 4 replies
  • 18 views
B
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When you click on tree control parent node name and later on click on "+" button to expand that node changed event executes multiple times depends on the child element present inside that parent node.

 

See Below example:- When i click on Parent1(text) and then click on "+" button of Parent1, event fires 2 times. If i do same on Parent2, event fires 3 times.

 

+ Parent1

    +Child 1.1

     +Child 1.2

+Parent2

     +Child 2.1

      +Child 2.2

      +Child 3.3

How to solve this issues in K2 5.3 version?

Best answer by BB33

Below solution works for me and it is work around for Tree View Control:-

  • Keep Load Ahead Level property to 1 (As default setting) or set to none.
  • On Tree Change Event add below Advance Condition to check ID of parent node if it not equal then only execute logic(rules) that you want.
  • Add Data Label(Flag) on View or Form and set Value as 0.
  • Add below condition in Changed Event:-
  • When Tree is Changed
  •    If an Advanced Condition is True (Tree is not empty & Flag is not equal to ID) See image Tree.png
  •           Execute Your Logic Rules.
  •           Set Flag = Tree Current ID (View -->Control-->Tree-->Data Source-->ID) See image Tree1.png

So on changed event it will not loop mutiple time for same ID of your clickable parent node.



    4 replies

    E
    Forum|alt.badge.img+9

    Hi bhushanborole

     

    See the attached linke below for a fix

     

    https://help.k2.com/kbs100103

    https://community.k2.com/t5/K2-Five/Tree-control-The-quot-Tree-is-Changed-quot-event-executes/ta-p/102603

     

    Should you find the information from the article useful or leading you to the answer please mark as "Solution and/or Kudo", as it will assist other k2 developers with relevant information in the near future.

     

    Best Regards

    Elvis

     

    [K2 will not accept any liability for any issues arising from actions taken in respect of the information provided by any forum member]

    B
    Forum|alt.badge.img+7
    • BB33
    • Author
    • Novice
    • June 5, 2019

    I already went through that articles and if i set the Load Ahead Level property to 2, It works only upto 2 levels.

     

    I have more than 9 level of tree structure.  If we setup Load Ahead Level property more than 2 it causes performance issue as well.

    E
    Forum|alt.badge.img+9

    Hi bhushanborole

     

    You can log a ticket to support and request for  assistance 

     

    Regards

    Elvis

    B
    Forum|alt.badge.img+7
    • BB33
    • Author
    • Novice
    • Answer
    • June 5, 2019

    Below solution works for me and it is work around for Tree View Control:-

    • Keep Load Ahead Level property to 1 (As default setting) or set to none.
    • On Tree Change Event add below Advance Condition to check ID of parent node if it not equal then only execute logic(rules) that you want.
    • Add Data Label(Flag) on View or Form and set Value as 0.
    • Add below condition in Changed Event:-
    • When Tree is Changed
    •    If an Advanced Condition is True (Tree is not empty & Flag is not equal to ID) See image Tree.png
    •           Execute Your Logic Rules.
    •           Set Flag = Tree Current ID (View -->Control-->Tree-->Data Source-->ID) See image Tree1.png

    So on changed event it will not loop mutiple time for same ID of your clickable parent node.



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