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    <p>I've run into this problem a couple times. The only way I've actually gotten this resolved was to call <code>setValue</code> on the combobox after the store has loaded, you could just add a listener on the store, but that always seemed somewhat messy to me. I usually have a stand-alone event listener like this:</p> <pre><code>Store.on('load',function(store) { Ext.getCmp('order-qty').setValue(store.getAt('0').get('qty')); }); </code></pre> <p><strong>EDIT:</strong> 18 Jan 2012</p> <p>OK as mentioned here is a complete working example of ComboBox with a default value being set. This is done using ExtJS 4.02, should work fine with 4.07 though, not sure about 4.1.</p> <p>Make sure you put your correct extjs path in the links (see brackets at the top of html), otherwise just put both combo-example and data.json at the same directory level and they should run fine:</p> <p>data.json:</p> <pre><code>[ {"value":1,"name":"Option 1"}, {"value":2,"name":"Option 2"}, {"value":3,"name":"Option 3"} ] </code></pre> <p>combo-example.html:</p> <pre><code>&lt;html&gt; &lt;head&gt; &lt;meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"&gt; &lt;title&gt;Combo Box Example&lt;/title&gt; &lt;link rel="stylesheet" type="text/css" href="[your extjs path]/resources/css/ext-all.css"&gt; &lt;script type="text/javascript" src="[your extjs path]/ext-all.js"&gt;&lt;/script&gt; &lt;script type="text/javascript" &gt; Ext.onReady(function() { // the datastore var myStore = new Ext.data.Store({ fields: ['value', 'name'], proxy: { type: 'ajax', url : 'data.json', reader: { type: 'json' } }, autoLoad: true }); // a window to hold the combobox inside of a form myWindow = Ext.create('Ext.Window', { title: 'A Simple Window', width: 300, constrain: true, modal: true, layout: 'fit', items: [{ // the form to hold the combobox xtype: 'form', border: false, fieldDefaults: { labelWidth: 75 }, bodyPadding: '15 10 10 10', items: [{ // the combobox xtype: 'combo', id: 'myCombo', fieldLabel: 'A Label', valueField: 'value', displayField: 'name', store: myStore, //queryMode: 'local', typeAhead: true, forceSelection: true, allowBlank: false, anchor: '100%' },{ // shows the selected value when pressed xtype: 'button', margin: '10 0 0 100', text: 'OK', handler: function() { alert('Name: ' + Ext.getCmp('myCombo').getRawValue() + '\nValue: ' + Ext.getCmp('myCombo').value); } }] }] }); // show the window myWindow.show(); // function to give the combobox a default value myStore.on('load',function(store) { Ext.getCmp('myCombo').setValue(store.getAt('0').get('value')); }); }); &lt;/script&gt; &lt;/head&gt; &lt;body&gt; &lt;/body&gt; &lt;/html&gt; </code></pre>
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    1. POpre-selecting value from dropdown (Combo box) in extjs?
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    1. COI was going to post a solution along the same lines (+1). Mad-D, you have to make sure Geronimo's snippet is BEFORE any load call to the store. If it still didn't work, any errors in firebug? Can you verify that the store, once loaded, does indeed have records?
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    2. COThis always works fine for me... Is this for ExtJS**4**? Your store and combobox are still configured the same as above? Did you put the example above outside of all other functions but inside of Ext.onReady? If you want to be dirt simple about it (but not dynamic at all) you could always just add a `value` config to the combobox e.g.: `value: '100'` or `value: 100`
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    3. COi tried these things 1. 'store.getAt('0').get('qty'))' in alert and got value as expected i.e 100 but it didn't set defaultvalue. 2. when i tried value:'100' and value:100 it's not showing default set as 100.
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