[英]google maps route in ASP
我需要在ASP中的2個位置之間獲得一條路線,因為我希望變量可以改善我的頁面導航。 我在網上找到了一種行之有效的出色方法,但是它激活了onclick函數。 我需要重新加載頁面以從數據庫中獲取變量。
原始版本是這樣的:
<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>" + " " + distance + "<br />";
dvDistance.innerHTML += "<strong>" + "Durata:" + "</strong>" + " " + duration;
} else {
alert("Impossibile trovare la distanza stradale");
}
});
}
</script>
它由請求表單中的onclick =“ GetRoute()”命令激活,我在兩個字段中輸入出發地和目的地。 然后,它將在旁邊顯示帶有兩個位置的地圖以及路線信息。 現在,我想要的是用asp激活它,因為我需要訪問我的sql。因此,按鈕類型將變為沒有onclick指令的提交,頁面將被重新加載,我將得到我需要查詢數據庫的數據並且gmaps腳本將照常運行,自動觸發該GetRoute()函數。 我希望我已經很清楚了,我的英語有點生銹了,我可以提供進行中的地址來解決這個壞男孩。
我希望在重新加載頁面后自動激活整個腳本,而無需使用onclick命令。 因此,基本上,我想擺脫GetRoute()命令。 只要我擁有腳本所需的數據(txtSource和txtDestination),就可以在頁面重新加載后獲取我的地圖和路線?
您可以使用GetRoute
函數對現有代碼進行一些修改,而無需onclick
:
在GetRoute函數中,將source
變量和destination
變量設置為請求值:
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,為body
標簽添加<body onload="GetRoute();">
以便在加載所有元素之后調用該函數。
謝謝您的幫助。 我使用了您的建議,地圖出現了,但是沒有路線,所以也許我在代碼中做錯了。 我可以確認兩個請求(txtsource和txtdestination)已正確傳遞。
<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>" + " " + distance + "<br />";
dvDistance.innerHTML += "<strong>" + "Durata:" + "</strong>" + " " + duration;
} else {
alert("Impossibile trovare la distanza stradale");
}
});
}
}
</script>
編輯:我在HTML中有用於地圖和路線的div。 因為地圖顯示了,所以這似乎不是問題,但是我沒有路線
<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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