PC版钉钉免登失败

求助:以下代码,手机端免登正常登录,为什么PC版无法登录,好像 DingTalkPC.ready没有运行.是怎么回事?谢谢各位了.


    @{
        string ddstr = "";
        if (ViewBag.client == "dd")
        {
            <script type="text/javascript" src="http://g.alicdn.com/ilw/ding/0.8.9/scripts/dingtalk.js"></script>
            ddstr = "dd";
        }
        else if (ViewBag.client == "ddpc")
        {
            <script type="text/javascript" src="http://g.alicdn.com/dingding/dingtalk-pc-api/2.3.1/index.js"></script>      
            ddstr = "DingTalkPC";
        }
    }
    <script type="text/javascript">
        var _config = {
            agentId: '@ViewBag.appId',
            corpId: '@ViewBag.corpId',
            timeStamp: '@ViewBag.timestamp',
            nonce: '@ViewBag.nonceStr',
            signature: '@ViewBag.signature'
        };
        var ddapi =@ddstr;  
        ddapi.config({
            agentId: _config.agentId,
            corpId: _config.corpId,
            timeStamp: _config.timeStamp,
            nonceStr: _config.nonce,
            signature: _config.signature,
            jsApiList: ['runtime.permission.requestAuthCode']
        });
        ddapi.ready(function () {
             ddapi.runtime.permission.requestAuthCode({
                corpId: _config.corpId,
                onSuccess: function (result) {            
                    location.href = "/Login/DdLoginServer/?code=" + result["code"];
                },
                onFail: function (err) {        
                }
            });
        });      
    </script>