[英]How do I get my hidden field values on Postback
Here is my java script 这是我的Java脚本
$('#geoLocation').click(function () {
alert("I am Here");
if (navigator.geolocation) {
// Get Latitude and Longitude
navigator.geolocation.getCurrentPosition(showPosition);
}
else {
// Hide Locator Panel, if Browser not supported
document.getElementById('panel1').style.display = 'none';
}
});
function showPosition(position) {
// x.innerHTML = "Latitude: " + position.coords.latitude +
// "<br>Longitude: " + position.coords.longitude;
document.getElementById('latitude').innerHTML = position.coords.latitude;
document.getElementById('longitude').innerHTML = position.coords.longitude;
}
I need to get at the latitude and longitude values (which are hidden on the screen), in Postback on the CodeBehind. 我需要在CodeBehind上的回发中获取经度和纬度值(隐藏在屏幕上)。 How do I do this? 我该怎么做呢?
I assume 'latitude' and 'longitude' are HTML elements on the page ? 我假设“纬度”和“经度”是页面上的HTML元素?
That being the case, you should be able to add a runat="server" attribute to them and then they will be available in server-side code. 在这种情况下,您应该能够向它们添加runat =“ server”属性,然后它们将在服务器端代码中可用。 If you're site is ASP.NET 4/4.5 you can also add ClientIDMode="Static" and your showPosition function will work as it is; 如果您的网站是ASP.NET 4 / 4.5,则还可以添加ClientIDMode =“ Static”,并且showPosition函数将按原样运行; if not you could a class to them and use a jQuery class selector to get your two items. 如果不是,您可以给他们一个类,并使用jQuery类选择器来获取两个项目。
You can use $('#HiddenFieldId').val()
to assign data to HiddenField at client side. 您可以使用$('#HiddenFieldId').val()
在客户端将数据分配给HiddenField 。
<div id="geoLocation">Click me to retrieve Geo Location</div>
<asp:HiddenField runat="server" ID="LatitudeHiddenField" />
<asp:HiddenField runat="server" ID="LongitudeHiddenField" />
<script type="text/javascript"
src="//ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script>
<script type="text/javascript">
$('#geoLocation').click(function () {
if (navigator.geolocation) {
// Get Latitude and Longitude
navigator.geolocation.getCurrentPosition(showPosition, geoLocationErrors);
} else {
// Hide Locator Panel, if Browser not supported
document.getElementById('panel1').style.display = 'none';
}
function showPosition(position) {
$('#<%= LatitudeHiddenField.ClientID %>').val(position.coords.latitude);
$('#<%= LongitudeHiddenField.ClientID %>').val(position.coords.longitude);
}
function geoLocationErrors() {
alert("Your browser doesn't support Geo Location.");
}
});
</script>
Then you can retrieve those value from HiddenField at server side as - 然后,您可以从服务器端的HiddenField检索这些值,方法是-
var latitute = LatitudeHiddenField.Value;
var longitude = LongitudeHiddenField.Value;
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