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  1. #1
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    Default [CLOSED] ComboBox.select before rendering gives NullPointerException

    [CLOSED] ComboBox.select before rendering gives NullPointerException


    If I try to use method select just after creation ComboBox throws a NullPointerException. For example the next code:
    Code:
    ComboBox comboBox = new ComboBox();
                comboBox.setStore(listStore);
                comboBox.setDisplayField("name");
                comboBox.setEditable(true);
                comboBox.select(1);
    gives
    Code:
    [ERROR] Uncaught exception escaped
    java.lang.NullPointerException: null
        at com.extjs.gxt.ui.client.widget.form.ComboBox.select(ComboBox.java:351)
    PS. I have 3 items in the comboBox and it works well without using method select. But I need to select values.

  2. #2
    Sencha - GXT Dev Team darrellmeyer's Avatar
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    Default


    Code:
      /**
       * Select an item in the dropdown list by its numeric index in the list. This
       * function does NOT cause the select event to fire. The list must expanded
       * for this function to work, otherwise use #setValue.
       * 
       * @param index the index of the item to select
       */
      public void select(int index) {}
    You most likely want to be using setValue. select should only be used when the list is expanded. I changed the code so that the null pointer will not be thrown.

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