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Google ASP中的Google地图路线

热度:29   发布时间:2023-06-05 10:34:16.0

我需要在ASP中的2个位置之间获得一条路线,因为我希望变量可以改善我的页面导航。 我在网上找到了一种行之有效的出色方法,但是它激活了onclick函数。 我需要重新加载页面以从数据库中获取变量。

原始版本是这样的:

<script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?sensor=false&libraries=places"></script>
<script type="text/javascript">
    var source, destination;
    var directionsDisplay;
    var directionsService = new google.maps.DirectionsService();
    google.maps.event.addDomListener(window, 'load', function () {
        new google.maps.places.SearchBox(document.getElementById('txtSource'));

        directionsDisplay = new google.maps.DirectionsRenderer({ 'draggable': true });
    });

    function GetRoute() {
        var rome = new google.maps.LatLng(41.918357, 12.485029);
        var mapOptions = {
            zoom: 4,
            center: rome
        };
        map = new google.maps.Map(document.getElementById('dvMap'), mapOptions);
        directionsDisplay.setMap(map);
        directionsDisplay.setPanel(document.getElementById('dvPanel'));

        //*********DIRECTIONS AND ROUTE**********************//
        source = document.getElementById("txtSource").value;
        destination = document.getElementById("txtDestination").value;

        var request = {
            origin: source,
            destination: destination,
            travelMode: google.maps.TravelMode.DRIVING
        };
        directionsService.route(request, function (response, status) {
            if (status == google.maps.DirectionsStatus.OK) {
                directionsDisplay.setDirections(response);
            }
        });

        //*********DISTANCE AND DURATION**********************//
        var service = new google.maps.DistanceMatrixService();
        service.getDistanceMatrix({
            origins: [source],
            destinations: [destination],
            travelMode: google.maps.TravelMode.DRIVING,
            unitSystem: google.maps.UnitSystem.METRIC,
            avoidHighways: false,
            avoidTolls: false
        }, function (response, status) {
            if (status == google.maps.DistanceMatrixStatus.OK && response.rows[0].elements[0].status != "ZERO_RESULTS") {
                var distance = response.rows[0].elements[0].distance.text;
                var duration = response.rows[0].elements[0].duration.text;
                var dvDistance = document.getElementById("dvDistance");
                dvDistance.innerHTML = "";
                dvDistance.innerHTML += "<strong>" + "Distanza:" + "</strong>" + "&nbsp;&nbsp;" + distance + "<br />";
                dvDistance.innerHTML += "<strong>" + "Durata:" + "</strong>" + "&nbsp;&nbsp;" + duration;

            } else {
                alert("Impossibile trovare la distanza stradale");
            }
});
    }
</script>

它由请求表单中的onclick =“ GetRoute()”命令激活,我在两个字段中输入出发地和目的地。 然后,它将在旁边显示带有两个位置的地图以及路线信息。 现在,我想要的是用asp激活它,因为我需要访问我的sql。因此,按钮类型将变为没有onclick指令的提交,页面将被重新加载,我将得到我需要查询数据库的数据并且gmaps脚本将照常运行,自动触发该GetRoute()函数。 我希望我已经很清楚了,我的英语有点生锈了,我可以提供进行中的地址来解决这个坏男孩。

我希望在重新加载页面后自动激活整个脚本,而无需使用onclick命令。 因此,基本上,我想摆脱GetRoute()命令。 只要我拥有脚本所需的数据(txtSource和txtDestination),就可以在页面重新加载后获取我的地图和路线?

您可以使用GetRoute函数对现有代码进行一些修改,而无需onclick

在GetRoute函数中,将source变量和destination变量设置为请求值:

    function GetRoute() 
    {

        source = "<%=Request("txtSource")%>"; 
        destination = "<%=Request("txtDestination")%>"; 


        if( source != "" && destination != "")
        {

            /*the rest of your code as is,except the following change:
            comment out the following two lines, as we are already setting this with the request values
            source = document.getElementById("txtSource").value;
            destination = document.getElementById("txtDestination").value;
            */


        }
     }

在html中,为body标签添加<body onload="GetRoute();">以便在加载所有元素之后调用该函数。

谢谢您的帮助。 我使用了您的建议,地图出现了,但是没有路线,所以也许我在代码中做错了。 我可以确认两个请求(txtsource和txtdestination)已正确传递。

<script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?sensor=false&libraries=places"></script><script type="text/javascript">
    var source, destination;
    var directionsDisplay;
    var directionsService = new google.maps.DirectionsService();
    google.maps.event.addDomListener(window, 'load', function () {
        new google.maps.places.SearchBox(document.getElementById('txtSource'));
        new google.maps.places.SearchBox(document.getElementById('txtDestination'));
        directionsDisplay = new google.maps.DirectionsRenderer({ 'draggable': true });
    });

    function GetRoute() 
    {
    source = "<%=Request.form("txtSource")%>"; 
    destination = "<%=Request.form("txtDestination")%>"; 

    if( source != "" && destination != "")
    {
        var rome = new google.maps.LatLng(41.918357, 12.485029);
        var mapOptions = {
            zoom: 4,
            center: rome
        };
        map = new google.maps.Map(document.getElementById('dvMap'), mapOptions);
        directionsDisplay.setMap(map);
        directionsDisplay.setPanel(document.getElementById('dvPanel'));

        //*********DIRECTIONS AND ROUTE**********************//
        /*source = document.getElementById("txtSource").value;
        destination = document.getElementById("txtDestination").value;
        */

        var request = {
            origin: source,
            destination: destination,
            travelMode: google.maps.TravelMode.DRIVING
        };
        directionsService.route(request, function (response, status) {
            if (status == google.maps.DirectionsStatus.OK) {
                directionsDisplay.setDirections(response);
            }
        });

        //*********DISTANCE AND DURATION**********************//
        var service = new google.maps.DistanceMatrixService();
        service.getDistanceMatrix({
            origins: [source],
            destinations: [destination],
            travelMode: google.maps.TravelMode.DRIVING,
            unitSystem: google.maps.UnitSystem.METRIC,
            avoidHighways: false,
            avoidTolls: false
        }, function (response, status) {
            if (status == google.maps.DistanceMatrixStatus.OK && response.rows[0].elements[0].status != "ZERO_RESULTS") {
                var distance = response.rows[0].elements[0].distance.text;
                var duration = response.rows[0].elements[0].duration.text;
                var dvDistance = document.getElementById("dvDistance");
                dvDistance.innerHTML = "";
                dvDistance.innerHTML += "<strong>" + "Distanza:" + "</strong>" + "&nbsp;&nbsp;" + distance + "<br />";
                dvDistance.innerHTML += "<strong>" + "Durata:" + "</strong>" + "&nbsp;&nbsp;" + duration;

            } else {
                alert("Impossibile trovare la distanza stradale");
            }


        });
    }
    }
    </script>

编辑:我在HTML中有用于地图和路线的div。 因为地图显示了,所以这似乎不是问题,但是我没有路线

<div class="row">
<div class="col-md-6">
<div id="dvMap" style="height: 500px"></div>
</div>
<div class="col-md-6" style="height:500px; overflow-x:hidden; overflow-y:auto;">
<div id="dvPanel" ></div>
</div>

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