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NguyenTien
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issue get items when Webdropdown closing
posted

Hi all.

i have webdropdown search and loadondemand. 

when the search results are just one item. I want the item to be selected.

I've tried checking in DropDownClosing event. If there are 2 items (including blank item), the item second to be selected

but i can't get list item in this event or can't get value this item.

Please see demo behind and help me.

Thanks!

DdlProvider_LoadOnDemand.zip
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  • 16310
    Offline posted

    Hello Nguyen,

    Thank you for your sample. I carefully followed your code and noticed this line:

     var item = sender._elements["List"].childNodes[1];

    This will return a

    • DOM element. Later you are trying to get the value and text by calling item.get_value() and item.get_text(), but these are not functions that you can run on DOM elements. Instead get the item this way:

    var item = sender.get_items()._items[1];

    and then item.get_value() and item.get_text() will return the correct results.

    Please see how this part of your code should look like:

    Code Snippet
    1. var itemSelected = sender.get_selectedItem();
    2. // next line will return true when the search results are 2 items (including blank item) and the selected item is the second item
    3. if (sender.get_items()._items.length == 2 && itemSelected.get_index() == 1) {
    4.     var item = sender.get_items()._items[1];
    5.     if (itemSelected != null) {
    6.         flagInit = true;
    7.         var olistItems = sender.get_items()._items;               // returns an array with the items
    8.         document.getElementById("HD_Entity_ID").value;           // correctly returns the value
    9.         if (itemSelected != null) {
    10.             document.getElementById("HD_Entity_ID").value = itemSelected.get_value();  // will return value of the selected item
    11.             document.getElementById("HD_Entity_Name").value = itemSelected.get_text(); // will return text of the selected item
    12.             document.getElementById("HD_SearchType").value = "";
    13.             sender.set_currentValue(itemSelected.get_text(), true);
    14.             return;
    15.         }
    16.         document.getElementById("HD_Entity_Name").value = itemSelected.textContent; // what do you try to get here ?
    17.         document.getElementById("HD_SearchType").value = "";
    18.         sender.set_currentValue(item.textContent, true);
    19.         return;
    20.     }
    21. }

    Apart from this I am not sure what is the whole idea of the code in the DropDownClosing event. If you clarify these for me maybe I will be able to rewrite the whole function inside:

    1) Do you want to check which is the selected item on dropDownClosing or you want to programmatically select an item ?

    2) What do you want to do if the 2nd item is selected or after you have selected it in code ?

    I hope this helps. If you answer my questions I will be glad to help you further.

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