How to Set Default Value in Binded Combobox

Hi All,

I have a binded combobox which have a list of values in it i want to set a value as a default value for the combobox how i can do it please put some light on it. my combo box is defined as under

oCB_OrderType = new sap.ui.commons.ComboBox("oCB_OrderType", {  tooltip: 'Order Type',   editable: true,   width: '100%',   selectedKey: "{AUART}",  displaySecondaryValues : true,   required: true,  });  oCB_OrderType.setSelectedKey("ZSRK");  var oOT_Template = new sap.ui.core.ListItem();  oOT_Template.bindProperty("key", "Auart");  oOT_Template.bindProperty("text", "Bezei");  oOT_Template.bindProperty("additionalText", "Auart");  oCB_OrderType.bindItems("/E_TVAKTSet", oOT_Template);

Regards