我正在编写一个需要保存一些坐标（纬度和经度值）的程序。写入这些值似乎不是问题，就在我加载它们并将地图图钉应用于加载的坐标时。这是我用来加载的代码：
try
{
//Read the file from the specified location.
fileReader = new StreamReader(new IsolatedStorageFileStream("cords.txt", FileMode.Open, fileStorage));
//Read the contents of the file (the only line we created).
string cords = fileReader.ReadToEnd();
Pushpin car = new Pushpin();
car.Background = new SolidColorBrush(Colors.Green);
car.Foreground = new SolidColorBrush(Colors.Black);
car.Content = "You Parked Here";
car.Tag = "carPushpin";
car.Location = cords; //getting error here...
this.map.Children.Add(car);
this.map.SetView(cords, 18.0); // ...and here
//Write the contents of the file to the TextBlock on the page.
fileReader.Close();
}
catch
{
MessageBox.Show("Debug Errror-no cords.txt");
}
和我得到的错误：
无法将类型“字符串”隐式转换为“System.Device.Location.GeoCoordinate”
'Microsoft.Phone.Controls.Maps.Core.MapBase.SetView(System.Device.Location.GeoCoordinate, double)' 的最佳重载方法匹配有一些无效参数
和
参数 1：无法从 'string' 转换为 'System.Device.Location.GeoCoordinate'
希望你们能帮助我
我已经尽我所能编辑了我的代码，但仍然无法解决问题......编辑后的代码：
try
{
//Read the file from the specified location.
fileReader = new StreamReader(new IsolatedStorageFileStream("latitude.txt", FileMode.Open, fileStorage));
//Read the contents of the file (the only line we created).
string carlatitude = fileReader.ReadToEnd();
fileReader = new StreamReader(new IsolatedStorageFileStream("longitude.txt", FileMode.Open, fileStorage));
//Read the contents of the file (the only line we created).
string carlongitude = fileReader.ReadToEnd();
fileReader.Close();
carlocation = new GeoCoordinate(carlatitude, carlongitude);
Pushpin car = new Pushpin();
car.Background = new SolidColorBrush(Colors.Green);
car.Foreground = new SolidColorBrush(Colors.Black);
car.Content = "You Parked Here";
car.Tag = "carPushpin";
car.Location = carlocation;
this.map.Children.Add(car);
this.map.SetView(watcher.Position.Location, 18.0);
}
catch
{
MessageBox.Show("Debug Errror-no cords.txt");
}