Question

我正试图找到一种方法来保持我的会话活着当Controller花了很长时间才能回来结果。单击按钮时我的Javascript如下所示：

function OnClick(s, e) {
        positionDate = ReportingPositionDate.GetDate().toDateString();

        if (true) {
            $.ajax({
                type: "POST",

                url: "@Url.Action("DataFileUpload", "ImportData")",
                data: JSON.stringify({ positionDate: positionDate }),
                dataType: "text",
                contentType: "application/json; charset=utf-8",
                beforeSend: function () { lpImport.Show(); },
                success: function (msg) {
                    debugger;
                    ImportDataGridView.PerformCallback();
                    ImportSuccessMessage.SetVisible(true);
                    ImportSuccessMessage.SetText(msg);
                    lpImport.Hide();
                },
                Error: function (xhr) {
                    alert(xhr)
                    ImportDataGridView.PerformCallback();
                }
            });
        }
    }

在我获得成功之前基本上会话超时。我想默默地保持会话活着。谢谢大家。

Answer 1

我在网上搜索了同样的内容。有回应，但他们是不正确的。我最终能够调整其中一个，这就是结果：

- 创建一个asp.net mvc应用程序; 将以下内容添加到家庭控制器：

[HttpPost]
    public JsonResult KeepSessionAlive()
    {

        return new JsonResult { Data = "Postback " + on " + DateTime.Now};
    }

----将以下内容添加到index.cshtml：

<div id="myDiv"></div>
 @section scripts{
<script src="~/SessionUpdater.js"></script>
<script type="text/javascript">
SessionUpdater.Setup('@Url.Action("KeepSessionAlive","Home")');
</script>

} - 引用以下js文件[除了引用jquery]

SessionUpdater = (function () {
var clientMovedSinceLastTimeout = false;
var keepSessionAliveUrl = null;
//var timeout = 5 * 1000 * 60; // 5 minutes
var timeout = 15000; // 15 seconds for testing

function setupSessionUpdater(actionUrl) {
    // store local value
    keepSessionAliveUrl = actionUrl;
//    alert(actionUrl);
    // setup handlers
    listenForChanges();
    // start timeout - it'll run after n minutes
    checkToKeepSessionAlive();
}

function listenForChanges() {
    $("body").on("mousemove keydown", function () {
        clientMovedSinceLastTimeout = true;
    });
}


// fires every n minutes - if there's been movement ping server and restart timer
function checkToKeepSessionAlive() {
    setTimeout(function () { keepSessionAlive(); }, timeout);
}

function keepSessionAlive() {
    // if we've had any movement since last run, ping the server


   if (!clientMovedSinceLastTimeout && keepSessionAliveUrl != null) {
        $.ajax({
            type: "POST",
            url: keepSessionAliveUrl,
            success: function (data) {
                $('#span').text(data);
                $('#myDiv').append('<br/>' + data);
                // reset movement flag
                clientMovedSinceLastTimeout = false;
                // start listening for changes again
                listenForChanges();
                // restart timeout to check again in n minutes
                 checkToKeepSessionAlive();
            },
            error: function (data) {
                alert("ERROR");
                console.log("Error posting to " & keepSessionAliveUrl);
            }
        });
   }
   else {
       clientMovedSinceLastTimeout = false;
       listenForChanges();
       checkToKeepSessionAlive();
   }

}

// export setup method
return {
    Setup: setupSessionUpdater
};

 })();

ASP.net MVC保持会议活跃

1 个答案: