我开发了一个应用程序来从 mainpage.xaml 获取经度和纬度，现在我在另一个页面 page2.xaml 中，如何获取从 mainpage.xaml 获取的经度和纬度代码？
下面是我的 mainpage.xaml.cs 代码
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
using Microsoft.Phone.Controls;
using Microsoft.Phone.Controls.Maps;
using System.Device.Location;
using System.Threading;
namespace Fyp
{
public partial class MainPage : PhoneApplicationPage
{
/// <summary>
/// This sample receives data from the Location Service and displays the geographic coordinates of the device.
/// </summary>
GeoCoordinateWatcher watcher;
string accuracyText = "";
Pushpin myPushpin = new Pushpin();
/// <summary>
/// Constructor for the PhoneApplicationPage object
/// </summary>
public MainPage()
{
InitializeComponent();
}
#region User Interface
/// <summary>
/// Click event handler for the low accuracy button
/// </summary>
/// <param name="sender">The control that raised the event</param>
/// <param name="e">An EventArgs object containing event data.</param>
private void NextButtonClick(object sender, EventArgs e)
{
// Start data acquisition from the Location Service, low accuracy
NavigationService.Navigate(new Uri("/workshop.xaml", UriKind.Relative));
}
/// <summary>
/// Click event handler for the high accuracy button
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void StartButtonClick(object sender, EventArgs e)
{
// Start data acquisition from the Location Service, high accuracy
accuracyText = "FIT Building Multimedia University, Cyberjaya, 63000 Selangor";
watcher = new GeoCoordinateWatcher(GeoPositionAccuracy.High);
watcher.MovementThreshold = 100;
StartLocationService(GeoPositionAccuracy.High);
watcher.StatusChanged += new EventHandler<GeoPositionStatusChangedEventArgs>(watcher_StatusChanged);
watcher.PositionChanged += new EventHandler<GeoPositionChangedEventArgs<GeoCoordinate>>(watcher_PositionChanged);
myMap.ZoomLevel = 16.0f;
watcher.Start();
}
private void StopButtonClick(object sender, EventArgs e)
{
if (watcher != null)
{
watcher.Stop();
}
StatusTextBlock.Text = "location service is off";
LatitudeTextBlock.Text = " ";
LongitudeTextBlock.Text = " ";
}
#endregion
#region Application logic
/// <summary>
/// Helper method to start up the location data acquisition
/// </summary>
/// <param name="accuracy">The accuracy level </param>
private void StartLocationService(GeoPositionAccuracy accuracy)
{
// Reinitialize the GeoCoordinateWatcher
StatusTextBlock.Text = "starting, " + accuracyText;
watcher = new GeoCoordinateWatcher(accuracy);
watcher.MovementThreshold = 20;
// Add event handlers for StatusChanged and PositionChanged events
watcher.StatusChanged += new EventHandler<GeoPositionStatusChangedEventArgs>(watcher_StatusChanged);
watcher.PositionChanged += new EventHandler<GeoPositionChangedEventArgs<GeoCoordinate>>(watcher_PositionChanged);
// Start data acquisition
watcher.Start();
}
/// <summary>
/// Handler for the StatusChanged event. This invokes MyStatusChanged on the UI thread and
/// passes the GeoPositionStatusChangedEventArgs
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void watcher_StatusChanged(object sender, GeoPositionStatusChangedEventArgs e)
{
Deployment.Current.Dispatcher.BeginInvoke(() => MyStatusChanged(e));
}
/// <summary>
/// Custom method called from the StatusChanged event handler
/// </summary>
/// <param name="e"></param>
void MyStatusChanged(GeoPositionStatusChangedEventArgs e)
{
switch (e.Status)
{
case GeoPositionStatus.Disabled:
// The location service is disabled or unsupported.
// Alert the user
StatusTextBlock.Text = "location is unsupported on this device";
break;
case GeoPositionStatus.Initializing:
// The location service is initializing.
// Disable the Start Location button
StatusTextBlock.Text = "initializing location service," + accuracyText;
break;
case GeoPositionStatus.NoData:
// The location service is working, but it cannot get location data
// Alert the user and enable the Stop Location button
StatusTextBlock.Text = "data unavailable," + accuracyText;
break;
case GeoPositionStatus.Ready:
// The location service is working and is receiving location data
// Show the current position and enable the Stop Location button
StatusTextBlock.Text = " " + accuracyText;
break;
}
}
/// <summary>
/// Handler for the PositionChanged event. This invokes MyStatusChanged on the UI thread and
/// passes the GeoPositionStatusChangedEventArgs
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
void watcher_PositionChanged(object sender, GeoPositionChangedEventArgs<GeoCoordinate> e)
{
Deployment.Current.Dispatcher.BeginInvoke(() => MyPositionChanged(e));
}
/// <summary>
/// Custom method called from the PositionChanged event handler
/// </summary>
/// <param name="e"></param>
void MyPositionChanged(GeoPositionChangedEventArgs<GeoCoordinate> e)
{
// Update the TextBlocks to show the current location
LatitudeTextBlock.Text = e.Position.Location.Latitude.ToString("0.000");
LongitudeTextBlock.Text = e.Position.Location.Longitude.ToString("0.000");
// center the pushpin and map on the current position
myPushpin.Location = e.Position.Location;
myMap.Center = e.Position.Location;
// if this is the first time that myPushpin is being plotted, plot it!
if (myMap.Children.Contains(myPushpin) == false) { myMap.Children.Add(myPushpin); };
}
#endregion
private void PhoneApplicationPage_Loaded(object sender, RoutedEventArgs e)
{
}
}
}