069_VisualForce Ajax 更多用法解读02

一、同步调用的异常处理：AJAX Toolkit try catch...

<html>

	<head>

	<script src="/soap/ajax/44.0/connection.js" type="text/javascript"></script>

	<script>

		function setupPage() {

			var output = document.getElementById("output");

			var startTime = new Date().getTime()

			try {

			var queryResult = sforce.connection.query("Select Id, Name, Industry From

			Account order by Industry limit 30");

			layoutResults(queryResult, output, startTime);

			} catch(error) {

			queryFailed(error, output);

			}

		}

		function queryFailed(error, out) {

			out.innerHTML = "<font color=red>An error has occurred:</font> <p>" + error;

		}

		function layoutResults(queryResult, out, startTime) {

			var timeTaken = new Date().getTime() - startTime;

			if (queryResult.size > 0) {

				var output = "";

				var records = queryResult.getArray('records');

				for (var i = 0; i < records.length; i++) {

					var account = records[i];

					output += account.Id + " " + account.Name + " [Industry - "

					+ account.Industry + "]<BR>";

				}

				out.innerHTML = output + "<BR> query complexted in: " + timeTaken + " ms.";

			} else {

			out.innerHTML = "No records matched.";

			}

		}

	</script>

	</head>

	<body onload="setupPage()">

		div id="output"></div>

	</body>

</html>

二、VFPage AJAX Toolkit 中的数据迭代形式

  var result = sforce.connection.query("select id, name from account limit 10");

　var it = new sforce.QueryResultIterator(result);

  while (it.hasNext()) {

    var account = it.next();

  sforce.debug.log(account.Name);

}

三、AJAX Toolkit 中字符串单引号的使用方式

Bob's B-B-Q

Apex 中使用方式：SELECT ID from ACCOUNT WHERE Name LIKE 'Bob\'s B-B-Q%'

Ajax：SELECT ID from ACCOUNT WHERE Name LIKE 'Bob\\'s B-B-Q%'

四、使用Base64二进制编码字符串:例子待补充

引用放到static中js 要用：<apex:includeScript value="{!URLFOR($Resource.majac_static, 'js/common.js')}"/>

<apex:page >
<html>

<head>

<script type="text/javascript"

src="//ajax.googleapis.com/ajax/libs/dojo/1.10.4/dojo/dojo.js"></script>

<script src="/soap/ajax/44.0/connection.js"></script>

<script>

function setup() {

var document_ta = document.getElementById("document-ta");

sforce.connection.query("select name, id from document limit 1",

{onSuccess : querySuccess,

onFailure : function(error, doc_ta) {

doc_ta.value = "Oops something went wrong: " + error;

},

source: document_ta});

}

function querySuccess(result, doc_ta) {

var records = result.getArray("records");

if (records.length == 1) {

dojo.io.bind({

url: "/servlet/servlet.FileDownload?file=" + records[0].Id,

load: loadDocument});

} else {

doc_ta.value = "no records found";

}

}

function loadDocument(type, data, event) {

var document_ta = document.getElementById("document-ta");

document_ta.value = data;

}

</script>

</head>

<body onload="setup()">

<textarea id="document-ta" cols="80" rows="20">

</textarea>

</body>

</html>
</apex:page >

　　五、异步调用的超时参数：如果一个异步调用在适当的时间内没有完成，我们可以结束这个调用。要做到这一点，请在任何异步调用的回调部分中指定超时参数。

var account = new sforce.SObject("Account");
account.Name = "my new account";

sforce.connection.create([account], {onSuccess: print, onFailure: printerr, timeout: 100});

　　六、Ajax 委托给Remote Site

新建一个一条 remoete site：

sforce.connection.remoteFunction({

        url : "https://th-apex-http-callout.herokuapp.com",

           onSuccess : function(response) {

           alert("result" + response);

        }

    });

巴特西

069_VisualForce Ajax 更多用法解读02

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