MultiComboBox(多选下拉问题)
MultiComboBox多选下拉问题初始化时不能选中，有会用的请指导一下


var taskstatuscombo = new Ext.form.MultiComboBox({
xtype : "multicombo",
width:200,
id : "tf_orderState",
store:new Ext.data.JsonStore({
url : SPM_PATH+ "/spm/DictionarieAction.do?method=getDictionaryList&dictionaryType=1",
fields : ["value", "name"],
autoLoad : true,
listeners : {
load : function(store, records, options) {
Ext.getCmp("tf_orderState").setValue(Ext.getCmp("tf_orderState").getValue());
}
}
}),
valueField :"value",
displayField: "name",
labelSeparator:'：',
displaySeparator:';',
valueSeparator:',',
mode: 'local',
forceSelection: true,
hiddenName:'value',
editable: true,
triggerAction: 'all',
allowBlank:false,
emptyText:'请选择'
});