067_VFPage中Js与controller交互方式（二） RemoteAction

上篇文章介绍了Toolkit API，是一种js的前台写法

同步调用格式：
sforce.connection.method("argument1","argument2",...);

异步调用格式：
sforce.connection.method("argument1","argument2",...,"callback_function");

此次介绍的内容仍为JS前台的写法，不过是和controller交互的，他不同与action对应的method，而是一种在js代码中调用的controller 方法；

结构如下：

• Use this to specify whether or not to escape the Apex method’s response. The default value is {escape: true}.

 callbackFunction接收方法调用的状态和结果作为参数。

global with sharing class AccountRemoter {

    public String accountName { get; set; }
	public static Account cc{ get; set; }
    public AccountRemoter() { } // empty constructor

    @RemoteAction
    public static Account getAccount(String accountName) {
       cc = [SELECT Id, name,NumberOfEmployees FROM Account WHERE Name = :accountName];
        return cc;
    }

}

　　

<apex:page controller="AccountRemoter">
<script type="text/javascript">
	function getRemoteAccount() {
		var accountName = document.getElementById('acctSearch').value;

		Visualforce.remoting.Manager.invokeAction(
			'{!$RemoteAction.AccountRemoter.getAccount}',
			accountName,
			function(result, event){
				if (event.status) {
					//alert(result);
//console.log(result);
console.log(event);
					// Get DOM IDs for HTML and Visualforce elements like this
					document.getElementById('remoteAcctId').innerHTML = result.Id
					document.getElementById("{!$Component.block.blockSection.secondItem.acctNumEmployees}")
                                                                     .innerHTML = result.NumberOfEmployees;
				} else if (event.type === 'exception') {
					document.getElementById("responseErrors").innerHTML =
					                    event.message + "<br/>\n<pre>" + event.where + "</pre>";
				} else {
					document.getElementById("responseErrors").innerHTML = event.message;
				}
			},
			{escape: true}
		);
	}
</script>
<input id="acctSearch" type="text"/>
<button onclick="getRemoteAccount()">Get Account</button>
<div id="responseErrors"></div>

<apex:pageBlock id="block">
	<apex:pageBlockSection id="blockSection" columns="2">
		<apex:pageBlockSectionItem id="firstItem">
			<span id="remoteAcctId"/>
		</apex:pageBlockSectionItem>

		<apex:pageBlockSectionItem id="secondItem">
		   <apex:outputText id="acctNumEmployees"/>
		</apex:pageBlockSectionItem>
	</apex:pageBlockSection>
</apex:pageBlock>
</apex:page>