javascript - 强制 JavaScript 启动新的 Controller 操作

Question

在 VB、MVC-5 中使用 VS 2013: 这个问题涉及简单地从 View #1(在 JavaScript 代码中)调用 Controller 方法并传递字符串变量。

然后 Controller 应该永久调用 View #2。关键是我认为使用 AJAX 返回到 View #1 中的函数？

详细信息:

我在 Cesium.ScreenSpaceEventHandler 中捕获了一个左键单击事件，并且我想将确定的值(字符串)传递给 Controller 方法。然后我希望 Controller 方法调用一个新的 View 。

理论上，我的问题与Cesium无关，只是它是从点击事件处理程序中触发的。

这是第一个 View 中的 JavaScript 代码:

var leftClickHandler = new Cesium.ScreenSpaceEventHandler(viewer.scene.canvas);

leftClickHandler.setInputAction(function (action) {
    //reset visibility of selectionIndicator and infoBox
    viewer.selectionIndicator.viewModel.selectionIndicatorElement.style.visibility = 'visible';
    document.getElementsByClassName('cesium-infoBox')[0].style.visibility = "visible";

    var pickedObject = viewer.scene.pick(action.position);
    //don't do anything if we didn't click on an object
    if (!Cesium.defined(pickedObject)) { return; }

    //don't do anything if it's not the entity we care about
    //if (entity !== pickedObject.id) { return; }

    //if this is the entity we care about, hide the selectionIndicator and infoBox
    viewer.selectionIndicator.viewModel.selectionIndicatorElement.style.visibility = 'hidden';
    document.getElementsByClassName('cesium-infoBox')[0].style.visibility = "hidden";

    var myEntity = pickedObject.id;
    //alert('Picked: ' + myEntity.name);

    $.ajax({
        url: '@Url.Action("JobSelected", "Earth")',
        type: "POST",
        dataType: 'text',
        contentType: 'application/json; charset=utf-8',
        cache: false,
        data: myEntity.name,
        success: function () {
            alert("okay!");
        },
        error: function (jqXHR, textStatus, errorThrown) {
            alert("Error: " + errorThrown + jqXHR);
        }
    });
}, Cesium.ScreenSpaceEventType.LEFT_CLICK);

这是我想从第一个 View (或类似的待定)调用的 Controller 操作方法:

<HttpPost>
Public Function JobSelected(jobSpec As String) As ActionResult
    Dim result = edRepository.GetEarthDataByJobNumber(jobSpec).ToList()

    Return RedirectToActionPermanent("EarthData2", result)
End Function

我已经被这个问题困扰了两天了。我已经尝试了所有能找到的方法，包括使用 Ajax(显然)，但没有成功。

摘要:

我捕获了一个左键单击事件，该事件产生一个特定的作业名称。我想将该作业名称传递到一个新的 Controller 操作中，并让该操作启动一个新的 View (其模型包含该特定作业的详细信息)。

我的问题在于简单地调用 Controller 方法，传递一个变量(字符串)，然后让该方法调用一个新 View 。

新信息: 我在 View 中用以下代码替换了 Ajax 调用:

            var myEntity = pickedObject.id;
            //alert("'" + myEntity.name + "'");

            var myUrl = '@Url.Action("JobSelected", "Earth")';
            var newUrl = myUrl + '?=' + myEntity.name.replace(/ /g, "");
            var newUrl2 = newUrl.replace("HTI#", "");
            var newUrl3 = newUrl2.substr(0, newUrl2.indexOf("-"));

            window.location.replace(newUrl3);

其中大部分是对之前返回的 myEntity.name 字符串的一些清理。

好吧，这篇文章很棒(感谢您的帮助)，但现在我似乎无法让我的 Controller 能够使用超链接中现在的查询。换句话说，超链接现在显示； ../Earth/JobSelected?=1511033 但无论我做什么，我似乎都无法提取超链接中的 1511033 。我试过:

            Dim q As String = Request.Url.Query

这是我当前的 Controller 操作方法；

        <ActionName("JobSelected")>
    Function JobSelected() As ActionResult
        Dim q As String = Request.Url.Query
        Dim result = edRepository.GetEarthDataByHtiJobNumber(q).ToList()

        'The following works fine, so my issue is with obtaining the value (q) to be passed...
        'Dim result = edRepository.GetEarthDataByHtiJobNumber("1503069").ToList()

        Return View("EarthData2", result)
    End Function

但这不起作用。我得到一个异常(exception): System.ArgumentOutOfRangeException 有什么建议吗？

嗯，我找到了我需要的答案。以下作品； JavaScript代码:

            var myEntity = pickedObject.id;
            //alert("'" + myEntity.name + "'");

            var myUrl = '@Url.Action("JobSelected", "Earth")';
            var newUrl = myUrl + '?jobNumber=' + myEntity.name.replace(/ /g, "");
            var newUrl2 = newUrl.replace("HTI#", "");
            var newUrl3 = newUrl2.substr(0, newUrl2.indexOf("-"));

            window.location.replace(newUrl3);

Controller 代码；

        <ActionName("JobSelected")>
    Function JobSelected() As ActionResult
        Dim q As String = Request.Url.Query

        q = Replace(q, "?jobNumber=", "")
        Dim result = edRepository.GetEarthDataByHtiJobNumber(q).ToList()

        Return View("EarthData2", result)
    End Function

Answer 1

刚开始在 StackOverflow 上发帖(虽然是长期用户)，抱歉我将答案编辑了。

答案如下: JavaScript:

        var leftClickHandler = new Cesium.ScreenSpaceEventHandler(viewer.scene.canvas);

        leftClickHandler.setInputAction(function (action) {
            //reset visibility of selectionIndicator and infoBox
            viewer.selectionIndicator.viewModel.selectionIndicatorElement.style.visibility = 'visible';
            document.getElementsByClassName('cesium-infoBox')[0].style.visibility = "visible";

            var pickedObject = viewer.scene.pick(action.position);
            //don't do anything if we didn't click on an object
            if (!Cesium.defined(pickedObject)) { return; }

            //don't do anything if it's not the entity we care about
            //if (entity !== pickedObject.id) { return; }

            //if this is the entity we care about, hide the selectionIndicator and infoBox
            viewer.selectionIndicator.viewModel.selectionIndicatorElement.style.visibility = 'hidden';
            document.getElementsByClassName('cesium-infoBox')[0].style.visibility = "hidden";

            var myEntity = pickedObject.id;
            //alert("'" + myEntity.name + "'");

            var myUrl = '@Url.Action("JobSelected", "Earth")';
            //The following is just clean-up code dealing with myEntity.name
            //Take out the spaces, and add the Query question and equals sign
            var newUrl = myUrl + '?jobNumber=' + myEntity.name.replace(/ /g, "");
            //Take out the leading, unwanted header
            var newUrl2 = newUrl.replace("HTI#", "");
            //Take out the trailing text, after the job #
            var newUrl3 = newUrl2.substr(0, newUrl2.indexOf("-"));
            //Redirect to the new page url and fire it up
            window.location.replace(newUrl3);

        }, Cesium.ScreenSpaceEventType.LEFT_CLICK);

Controller 功能；

        <ActionName("JobSelected")>
    Function JobSelected() As ActionResult
        Dim q As String = Request.Url.Query

        q = Replace(q, "?jobNumber=", "")
        Dim result = edRepository.GetEarthDataByHtiJobNumber(q).ToList()

        Return View("EarthData2", result)
    End Function

感谢所有观看或参与的人!