我可以为您指明正确的方向：导航至此处的 API 页面：http://dojotoolkit.org/api/ http://dojotoolkit.org/api/
并抬头看dojox.validate.isText.有一个minlength可以设置返回布尔值的标志。或者，您可以使用正则表达式：`dojox.validate.regexp可以在同一页面上找到。这是使用 minlength 标志的示例。这不是最优雅的解决方案（如果组合框具有启用/禁用的自动完成限制，那就更好了），但它说明了如何为 dojo 小部件设置属性。
<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/dojo/1.6.0/dijit/themes/tundra/tundra.css"media="screen"/>
<script src="http://ajax.googleapis.com/ajax/libs/dojo/1.7.1/dojo/dojo.js"type="text/javascript" ></script>
<script type="text/javascript">
dojo.require("dojo.parser");
dojo.require("dijit.form.ComboBox");
dojo.require("dojo.store.Memory");
dojo.require("dojox.validate._base");
dojo.require("dijit.form.Form");
dojo.require("dijit.form.Button");
var myBox, myForm, myButton, mainStore, altStore, test;
test = false;
dojo.ready(function(){
buildForm();
});
function buildForm(){
//use this store for your data
mainStore = new dojo.store.Memory({
data: [
{name:"Alabama", id:"AL"},
{name:"Alaska", id:"AK"},
{name:"American Samoa", id:"AS"},
{name:"Arizona", id:"AZ"},
{name:"Arkansas", id:"AR"},
{name:"Armed Forces Europe", id:"AE"},
{name:"Armed Forces Pacific", id:"AP"},
{name:"Armed Forces the Americas", id:"AA"},
{name:"California", id:"CA"},
{name:"Colorado", id:"CO"},
{name:"Connecticut", id:"CT"},
{name:"Delaware", id:"DE"}
]
});
//bind comboBox to an empty store until validation criteria met
altStore = new dojo.store.Memory({
data: []
});
//the comboBox needs to be contained in a form to work
myForm = new dijit.form.Form({
encType: 'multipart/form-data',
onSubmit: function(e){if(!myForm.validate())dojo.stopEvent(e);}
}, dojo.doc.createElement('div'));
//programmatically create the combobox
myBox = new dijit.form.ComboBox({
id: "myComboBox",
name: "state",
store: altStore,
searchAttr:"name"
});
myButton = new dijit.form.Button({
id: "comboBoxButton",
label: "get value",
onClick: function(){alert(dijit.byId('myComboBox').get('value'));}
});
//attach dijit elements the form and the form to the webpage
myForm.domNode.appendChild(myBox.domNode);
myForm.domNode.appendChild(myButton.domNode);
dojo.byId("myDiv").appendChild(myForm.domNode);
//event listener to check comboBox for minimum text length
myBox.on("KeyPress", function(){
test = dojox.validate.isText(dojo.byId("myComboBox").value, {minlength: 2});
if (test){
myBox.store = mainStore;
}
if(!test){
myBox.store = altStore;
}
});
}
</script>
</head>
<body>
<div id="myDiv" class="tundra" ></div>
</body>
