ExtJS 组合框数组

Question

我想用以下数组创建一个组合框：

var operators = new Array(">=",">","=~","","!=","=","<","<=");

问题是我希望第一个元素（有时是最后一个元素）成为组合框的默认值。我找不到如何成功地做到这一点。

非常感谢，如有重复，请见谅。

编辑

var ops = new Array(">=",">","=~","","!=","=","<","<=");
var operators = new Ext.data.ArrayStore({ id: 0, fields: [ 'value' ], data: ops });

Ext.getCmp('variablesAttributesPanel').add({xtype: 'combo',     id: variables[j].getTitle() + 'MinCombo', mode: 'local', valueField: 'value', displayField: 'value', store: operators,  width: 50,  x: 240, y: (j * 20 + 19), editable: false, allowBlank: false});

这是使下拉列表中的选项>，=，，！，

有什么想法吗？

Answer 1

确保在组合框配置中设置了 triggerAction

triggerAction : 'all'

var operators = new Array(">=",">","=~","x","!=","=","<","<=");

var test1 = new Ext.form.ComboBox({
    height:100,
    width:100,
    store: operators
});

var test2 = new Ext.form.ComboBox({
    height:100,
    width:100,
    triggerAction: 'all',
    store: operators
});

var win=new Ext.Window({
    renderTo:Ext.getBody(),
    items:[test1,test2],
    height:300,
    width:300,
    title:'comboWin'
}).show();

test1.setValue(operators[1]);
test2.setValue(operators[2]);

Answer 2

使用组合框的 setValue 方法。在这种情况下，显示和值是相同的，因此您只需传入数组值即可：

comboBox.setValue(operators[0]);